P0856 chevy

The trucks and SUVs made by Chevrolet and GMC are almost identical. GMC vehicles, however, cost more than Chevrolet vehicles because General Motors markets GMC vehicles as more pro...

How to fix a Chevy with a P0451 engine code, "Evaporative Emission Control System Pressure Sensor Range/Performance".CorvetteForum - Chevrolet Corvette Forum Discussion; C5 Corvettes, 1997 - 2004; C5 Tech; Car died while driving, three codes P0856 c1277 b0363; ... Car died while driving, three codes P0856 c1277 b0363. So my car was sitting for a month, I had my wife run it every week, but today when I got home and drove her she was working fine until a …What is the Cost to Diagnose the Code P0856 2016 Chevrolet Silverado? Labor: 1.0. The cost to diagnose the P0856 2016 Chevrolet Silverado code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.U0073 Definition: Control Module Communication Bus”A” Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Express as it would any other. This code appears when something has interrupted the communication between two of your Express’s control modules. The most common causes of U0073 are ...Dec 23, 2023 · So, P0856, huh? Traction control torque request circuit acting up on your '06 Trailblazer. Good news: drives fine and the TC switch is doing its job. Here's the lowdown: First off, check the wiring harness around the traction control system. Look for any wear, breaks, or loose connections. Sometimes it's just a matter of a wire throwing a tantrum.

2017-2018 Acadia, Enclave, Traverse and XT5 models equipped with the 3.6L V6 engine (RPOs LFY, LGX) and all-wheel-drive (AWD). The following DTCs also may be set in the Engine Control Module (ECM): P018B: Fuel Pressure Sensor Performance. P2635: Fuel Pump Flow Performance. P0461: Fuel Level Sensor 1 Performance.The U0121 fault code indicates a communication problem with the Anti-Lock Brake System (ABS) Control Module. The ABS Control Module sends periodic messages to the Controller Area Network (CAN) bus. If the CAN bus does not receive these messages, the U0121 code is set. The CAN bus uses two wires for communication, CAN high and CAN low.DTC C0241 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0283 DTC C0287 DTC C0290 or C0292 DTC C0455 DTC C0550 ... Oct 16, 2006 - I drive a 2000 chevy impala...i have 135,000 miles on my car. ... The problem is that starting in '92, Anti-Lock Brakes are controled electronically, so if there is a problem with the sensor, your ABS might fail …Repair Information for P0856 code. Learn what Traction Control Torque Request Circuit Malfunction means, location and how to repair? The Electronic Brake Control Module (EBCM) and the Engine Control Module (ECM) simultaneously control the traction control.We have the best Sensor - Transmission Oil Pressure for the right price. Buy online for free next day delivery or same day pickup at a store near you.Welcome to the Schumacher Chevrolet Auto Group. Check out our specials, schedule service, or view our new and used vehicles for sale online. Skip to main content The Schumacher Chevrolet Group. Sales: (973) 833-3142; HOME_1_1; New Inventory New Inventory. Shop New Chevy & Buick Vehicles

P0856. The PCM supplies 5 volts through an internal resistor, to the EBCM on the requested torque signal circuit. The EBCM toggles this voltage to ground to create the requested torque signal at the PCM. I'll try to find that in a service manual and maybe try to find some wiring diagrams.P0856 - Traction Control Input Signal, P0856 means the traction control input signal is not functioning properly, possibly due to a faulty ON/OFF switch or defective connectors. P1689 - Traction Control Delivered Torque Output Circuit Conditions. GMC Description With the engine speed over 500 rpm, T/C system has failed, engine runtime …CorvetteForum - Chevrolet Corvette Forum Discussion. C5 Corvettes, 1997 - 2004. C5 Tech. code P0856. C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace.Silverado 3500 HD is offered as a Crew Cab with Standard Bed or Long Bed and is available in a single rear wheel (SRW) or dual rear wheel (DRW) configuration. Front Head Room. 43.03 in. Front Leg Room. 44.54 in. Front Shoulder Room. 66.02 in. Discover the unstoppable 2024 Chevrolet Silverado HD Heavy Duty Truck with an enhanced Duramax 6.6L ...They are ECM U0121,ECM P0856, EBCM C0550, EBCM C0281, EBCM C0899 and Body Control Module U2108. I hope you can assist as many technicians are reluctant to get involved, as the corvette is a rarity in Australia. Thanks. ... Brought to Chevy dealer who replaced hub #88967287 and harness #10332527.

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P0700 Chevy Silverado GuideMechanic.Com The P0700 code on a Chevy Silverado indicates a problem with the transmission control system. The code is a generic powertrain code, which means that it applies to all makes and models of vehicles equipped with an OBD-II system (1996 and newer).Oct 9, 2022 ... Power steering motor never replaced. Reply · Subscribe · Reply to Thread. Related Topics. P0856 Traction Control · Issues with ABS traction&nbs...=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====nonda Auto DIY Center is the biggest ...dr.duck55. The DTC you got is about loss of communication. The sensing and diagnostic module (SDM) is a microprocessor and the control center for the SIR system that contains internal sensors. Usually a DTC related to SDM should set up the Air Bag warning light and not the ABS light. Could be caused by a bad connection.

What is the Cost to Diagnose the Code P0856 2018 GMC Sierra? Labor: 1.0. To diagnose the P0856 2018 GMC Sierra code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type.DTC C0241 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0283 DTC C0287 DTC C0290 or C0292 DTC C0455 DTC C0550 DTC C0558 Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription . • DTC C0035 Left Front …We have the best Sensor - Transmission Oil Pressure for the right price. Buy online for free next day delivery or same day pickup at a store near you.Apr 19, 2021 ... Maybe some help here: U1040 Chevrolet ... ECM is P0856-00. BCM is a TPMS warning (had ... A forum community dedicated to Chevy Colorado and GMC ...First trip to the dealer I had codes p0575, p0700,p0703, p0856 Second trip to the dealer I had codes u0073, p0700, p0856 I picked the car up last night and they said "we can't find anything wrong, just some historical codes". Apparently on Monday morning when I shut off the engine it archived the codes and the car functioned normally upon restart.Summary: This technical bulletin provides a revision of 03-06-03-003B to add the 2010-2014 model years, update the Attention statement, change the terms Claim Type B to Claim Type ZPTI, GM Dealer to GM Service Agent, Repair Order to Job Card, Warran. Communication Number: 99-04-20-002H, Date: 2013-04-11.P0856 - Traction Control Input Signal, P0856 means the traction control input signal is not functioning properly, possibly due to a faulty ON/OFF switch or defective connectors. P1689 - Traction Control Delivered Torque Output Circuit Conditions. GMC Description With the engine speed over 500 rpm, T/C system has failed, engine runtime …DTC C0241 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0283 DTC C0287 DTC C0290 or C0292 DTC C0455 DTC C0550 DTC C0558 Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . ... 2002-2006 Chevrolet TrailBlazer, TrailBlazer EXT 2002-2006 GMC Envoy, Envoy XL,p0700 p0856 both this seem to be a common issue on gm's i have alos goten the range shift inhibitor light on and off. ... I have a 2006 Chevy Tahoe Z71 with the 5.3 liter engine and 105,000 miles on it. The traction control seems to kick in when you pull away from a stop.

P0856 Mercedes-Benz Traction Control Input Signal. OBD Code:System:Subsystem: P0856 Mercedes-Benz - (ASE) Powertrain Transmission Controls. Trouble Code Description: Traction Control Input Signal. Location:Analysis:Possible Causes: Tech description:

The first step to decoding the Chevy engine block code is to locate and identify the code on the engine assembly stamp correctly. Next understand the block code. The code has 15 ch...The engine coolant temperature (ECT) is between 4-30°C (39-86°F). The intake air temperature (IAT) is between 4-30°C (39-86°F). The start up ECT and IAT are within 9°C (16°F) of each other. DTC P0446 runs continuously once the above conditions are met. The FTP is not within a calibrated amount for a calibrated period of time.Apr 18, 2021 · So I put fully charged battery in with all cleaned up grounds/splice packs and same code came up U1040 and U1040-00. I was able to open up actuation tests for each module except the brake control module. I would assume then that this is the problem. A replacement EBCM is about 180 new. 2006 Chevrolet Cobalt SS 2.4L with code P0856, what is the fix? asked Aug 18, 2018 by Dillon. p0856; chevrolet; cobalt +1 vote. 2 answers 766 views. 2006 Chevrolet Cobalt with engine code P0068. asked Aug 16, 2018 by Jim. p0068; chevrolet; cobalt; 36.9k questions 32.1k answers 1.3k comments 22.6k usersP0856 - Traction Control Input Signal, P0856 means the traction control input signal is not functioning properly, possibly due to a faulty ON/OFF switch or defective connectors. P1689 - Traction Control Delivered Torque Output Circuit Conditions. GMC Description With the engine speed over 500 rpm, T/C system has failed, engine runtime …Hey all, Ok well with all the following codes, I am left unsure where to turn and the Local Garage just dinged me with 300 bucks for looking at it with only the advice to replace the EBCM Brake control Module. Not sure that is the right 1st step. Your thoughts? Codes P0446 Vent Performance...Ask Your Own Chevy Question. Chevy Mechanic: Master Auto Tech. the p0700 means you have a code in the transmission control module. Give me a min on the 856Here's what it wants you to do for the other code. 1. Check for Transmission Control Module (TCM) codes/data. 2. If no data, test the TCM power/grounds. 3.Holden 08 VE Fault codes return after driving P0856, P0500. ... Vauxhall Monaro, and Chevrolet Lumina Models. 3 posts • Page 1 of 1. Holden 08 VE Fault codes return after driving P0856, P0500. by chutikitty » Mon Jun 22, 2015 1:35 pm . Hello ladies and gentlemen,Dec 18, 2015 · Aran. I have a problem. Came error P0575, P069E, U0073, P2544, P0856, P0703 P0700. The instrument panel does not read - Answered by a verified Chevy Mechanic P0856 - Engine Control Module (ECM) Indicated TCS Malfunction; These DTCs are an indicator that the ECM receives an invalid message from the EBCM. ... My 2012 Chevy Colorado WT 2.9L has these lights randomly turn on mainly if it sits running too long then my cruise control sometimes doesn't work either ...

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To diagnose the P0856 2017 GMC Sierra code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.DTC C0241 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0283 DTC C0287 DTC C0290 or C0292 DTC C0455 ... Traction Control lights ON, alone with check engine light. ... 2007 Chevy Equinox LT FWD 2007 Saturn Ion 2 Quad Coupe ... HELP - Service Stabilitrak & Service Traction Control Aug 30, 2011 Service Traction Control - Stabilitrak and ABS light ...DTC C0241 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0283 DTC C0287 DTC C0290 or C0292 DTC C0455 DTC C0550 DTC C0558 Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription . • DTC C0035 Left Front Wheel Speed Sensor CircuitRepair Information for P0856 code. Learn what Traction Control Torque Request Circuit Malfunction means, location and how to repair? The Electronic Brake …Welcome to Schumacher Chevrolet of North Palm Beach. Welcome to Schumacher Chevrolet of North Palm Beach, a family-owned Chevrolet dealership that is proud to be serving drivers in Lake Park, West Palm Beach, Greenacres, and Stuart, FL. When you choose our Chevy dealership in West Palm Beach, we are dedicated to "serving customers for life ...Get ratings and reviews for the top 11 gutter guard companies in Chevy Chase, MD. Helping you find the best gutter guard companies for the job. Expert Advice On Improving Your Home...P0856. The ignition is ON. The engine is running at a speed greater than 450 RPM for 5-20 seconds. Conditions for Setting the DTC. C0298. The EBCM receives a serial data message stating that the PCM has lost the ability to reduce engine torque. P0856. The PCM receives an invalid requested torque signal for 3 seconds.Aug 15, 2021 ... P0856: Traction Control Input Signal. Risk Level: DRIVING PERMITTED Repair ASAP · More videos you may like · Related Pages.Welcome to Schumacher Chevrolet of North Palm Beach. Welcome to Schumacher Chevrolet of North Palm Beach, a family-owned Chevrolet dealership that is proud to be serving drivers in Lake Park, West Palm Beach, Greenacres, and Stuart, FL. When you choose our Chevy dealership in West Palm Beach, we are dedicated to "serving customers for life ...A 2012 Chevrolet Colorado 2wd-extended-cab with this code is still drivable. However, since it disables the traction control system, that means your 2012 Chevrolet Colorado 2wd-extended-cab is unsafe to use in icy or wet roads.Dec 12, 2013 · 2004 Chevrolet Chevy C Silverado - 2WD -----Subject: ABS Light On, DTCs C0265, C0201, U1041 Set and/or Loss of Communication with Brake Module (Reground EBCM Ground) #04-05-25-002C - (11/23/2005) Models: 2004-2005 Buick Rainier 2002-2006 Cadillac Escalade, Escalade EXT 2003-2006 Cadillac Escalade ESV 1999-2006 Chevrolet Silverado ….

Ask Your Own Chevy Question. Chevy Mechanic: Master Auto Tech. the p0700 means you have a code in the transmission control module. Give me a min on the 856Here's what it wants you to do for the other code. 1. Check for Transmission Control Module (TCM) codes/data. 2. If no data, test the TCM power/grounds. 3.The engine coolant temperature (ECT) is between 4-30°C (39-86°F). The intake air temperature (IAT) is between 4-30°C (39-86°F). The start up ECT and IAT are within 9°C (16°F) of each other. DTC P0446 runs continuously once the above conditions are met. The FTP is not within a calibrated amount for a calibrated period of time.A 2012 Chevrolet Colorado 2wd-extended-cab with this code is still drivable. However, since it disables the traction control system, that means your 2012 Chevrolet Colorado 2wd-extended-cab is unsafe to use in icy or wet roads.Thank you for the response! In my searches I have found the following recommendations for the codes I have. (1) Electronic Brake & Traction Control Module or wheel speed sensor (2) Timing Chain malfunction (3) Malfunctioning or dirty throttle body (4) Clogged Fuel Injectors (5) Vacuum Leak (6) Battery.DTC C0241 or P0856 Circuit Description The powertrain control module (PCM) supplies approximately 5 volts through an internal resistor to the electronic brake control module (EBCM) on the requested torque signal circuit. The EBCM toggles this voltage to ground in order to create the requested torque signal at the PCM.DTC C0241 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0283 DTC C0287 DTC C0290 or C0292 DTC C0455 DTC C0550 DTC C0558 Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription . • DTC C0035 Left Front …Apr 18, 2021 · So I put fully charged battery in with all cleaned up grounds/splice packs and same code came up U1040 and U1040-00. I was able to open up actuation tests for each module except the brake control module. I would assume then that this is the problem. A replacement EBCM is about 180 new. Fixed 2008 chevy trailblazer with a 4.2 engine will not shut off. Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get …Verify that no other DTCs are set except for C0242 or P0856. If any other DTCs are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle . If no other DTCs are set. Replace the K20 Engine Control Module. Verify that DTC C0242 or P0856 does not set while operating the vehicle within the Conditions for Running the DTC. If DTC C0242 or P0856 ...My chevy 2009 trailblazer V6 had the check engine light appear a few weeks ago. Code came up P2440. I replaced the Secondary Air Check Valve (ACD # 214-2151) and reset the computer. The check engine light went away and the car ran great for about a week. The check engine light reappeared with the same P2440 code (Secondary Air Injection System ... P0856 chevy, First trip to the dealer I had codes p0575, p0700,p0703, p0856 Second trip to the dealer I had codes u0073, p0700, p0856 I picked the car up last night and they said "we can't find anything wrong, just some historical codes". Apparently on Monday morning when I shut off the engine it archived the codes and the car functioned normally upon restart., U0121, U0101, U2100, U104, P0700, P2544, U0073. Before beginning to deep dive into any diagnostics first (If equipped) check the VCIM module (Onstar) connector C3 (Black) to be sure that it has been fully seated. This connector has been increasingly showing up as the root cause for loss of HIGH speed LAN concerns., The cost to diagnose the P0856 2017 Chevrolet Silverado code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour., when the p0856 code is caused The PCM diagnoses the requested torque PWM signal circuit and sends a message to the EBCM indicating a fault is present. A fault exists in the circuit if the PCM detects one of the following conditions: The requested torque PWM signal is less than 5 percent duty cycle or greater than 95 percent duty cycle., 4) Low Tire Pressure. Driving with tires that are underinflated reduces their traction and contact with the road surface, which can activate the traction control system and cause the warning light to come on when accelerating. Low tire pressure allows more tire flex and distortion as you press down on the gas pedal., C0298 DTC C0298 or P0856 Circuit Description C0298 The Powertrain Control Module (PCM) and the Electronic Brake Control Module (EBCM) communicate on the serial data link whenever the ignition is ON. P0856 The PCM supplies 5 volts through an internal resistor, to the EBCM on the requested torque signal circuit. The EBCM toggles this voltage to ground to create the requested torque signal at the ..., Fault code P0856 is called "Traction Control Input Signal Malfunction" but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II. Technical description and explained code P0856. OBD-II fault code P0856 is defined as a faulty traction control input signal., What is the Cost to Diagnose the Code P0856 2016 GMC Sierra? Labor: 1.0. To diagnose the P0856 2016 GMC Sierra code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type., How to fix a Chevy with a P0451 engine code, "Evaporative Emission Control System Pressure Sensor Range/Performance"., Detailed repair manual for the 2013 Chevy Truck Silverado 1500 4WD V6-4.3L. Operation CHARM: Car repair manuals for everyone. Home >> Chevy Truck >> 2013 >> Silverado 1500 4WD V6-4.3L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ... Verify that no DTCs except P0856 are present in the ECM., If you’re in the market for a new or used Chevrolet vehicle, it’s important to find a reputable dealership near you. With so many options available, it can be overwhelming to choos..., Code P0856 2014 Chevrolet Silverado Description. The Electronic Brake Control Module (EBCM) and the Engine Control Module ( ECM) simultaneously control …, From oil changes to tire rotations, brakes, batteries, and multi-point vehicle inspections, we can handle it all at our service department in PRESTONSBURG. Pop's Chevrolet looks forward to serving its esteemed clients, so call us on (606) 263-1564 and schedule your appointment today! Schedule Service., Not for a P0856. This is NOT a transmission issue. As stated above this is an ABS issue. 2013 2500 LML/A1000. Save Share. ... A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, …, Labor: 1.0. The cost to diagnose the U1040 Chevrolet code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour., CorvetteForum - Chevrolet Corvette Forum Discussion. C5 Corvettes, 1997 - 2004. C5 Tech. code P0856. C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace., SOURCE: 2006 Chevy Trailblazer makes THUD when accelerating. ... DTC C0241 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0283 DTC C0287 DTC C0290 or C0292 DTC C0455 DTC C0550 DTC C0558 Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then ., DTC C0241 or P0856 DTC C0244 or P1689 DTC C0245 DTC C0283 DTC C0287 DTC C0290 or C0292 DTC C0455 DTC C0550 ... Oct 16, 2006 - I drive a 2000 chevy impala...i have 135,000 miles on my car. ... The problem is that starting in '92, Anti-Lock Brakes are controled electronically, so if there is a problem with the sensor, your ABS might fail when you ..., The P0856 fault code refers to a malfunction in the Traction Control Torque Request Circuit. This code is set when the Electronic Brake Control Module (EBCM) and the Engine Control Module (ECM) are unable to control the traction control system simultaneously., What is P0856 Engine Code [Quick Guide] 4,831 views. 10. =============================Claim your FREE engine code eraser 👉 …, If your scan tool can access fault codes and the only one you retrieve from other modules is the U0121, try to access the ABS module. If you can access codes from the ABS module, then the U0121 code is either intermittent or a memory code. If unable to access codes for the ABS module, then the U0121 code that the other modules are setting is ..., Chevrolet Trax (2013-2022) Workshop Manual. Brakes. Antilock Brake System. Diagnostic information and procedures. DTC C0186, C0196, OR C0287: Lateral acceleration sensor/yaw rate sensor/lateral acceleration sensor ... DTC C0242 OR P0856: Traction control malfunction/traction control orque request signal Diagnostic Instructions Perform …, Detailed repair manual for the 2005 Chevy Truck Uplander FWD V6-3.5L VIN 8. Operation CHARM: ... P0856 DTC P0856 or C0241 Circuit Description The electronic brake control module (EBCM) and the powertrain control module (PCM) simultaneously control the Traction Control System (TCS). The EBCM sends a Requested Torque message via a …, Hey guys little problem, 2008 Chevy Siverado 3500 w/Duramax & Allison 350k mi. Had four codes,P0571,P0677,P0700&P0960 ,cleared the codes. Installed new glow plug & brake light switch ,checked all the … read more, 748 posts · Joined 2016. #5 · Apr 11, 2019. The initial clicking could've been the speed sensor (located near the wheel) getting pulled/strained/hit by the wheel until it eventually broke off. - Early 2017 Gen 2 Chevy Volt Premier (owned 2016-2019) - 2014 Cadillac ELR (2021-) - Tesla Model S 100D (2019-) J., U2623: Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 11. U2624: Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 12. Chevy has come out with a bulletin on the U codes that are coming up and that the issue is with the Battery Energy control module ..., What is the Cost to Diagnose the Code P0856 2018 Chevrolet Silverado? Labor: 1.0. The cost to diagnose the P0856 2018 Chevrolet Silverado code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour., Aug 3, 2015 · Have not figured out what is needed to resolve this situation. Had codes u0073, u0100, u0121, p0856, c0201, c0292, c0710, & c0870 come up along with traction control light, brake light, & a slight along with driver info display saying service stabilitrak, park assist off,service 4wd, & service trailer brake system. , P0856 DTC C0298 or P0856 Circuit Description C0298 The Powertrain Control Module (PCM) and the Electronic Brake Control Module (EBCM) communicate on the serial data link whenever the ignition is ON. P0856 The PCM supplies 5 volts through an internal resistor, to the EBCM on the requested torque signal circuit. The EBCM toggles this …, U0121-00, U0077-00, U0073-00, U0100-00, P069E-00, P0856-00, P150C-00, P2119-00, U0109-00. Mechanic's Assistant: What's the year and model of your truck? Im sorry I don't recall if it was blinking or solid, I can start it now? It's a 2016 Chevy Colorado Z71 with a 3.6L, It's been my experience with these trucks, that 4 things can generate a P0171. an air leak between the MAF and the throttle body. an intake vacuum leak. a sticking solenoid on the air pump, and a dirty throttle body. You've already looked at 3 of the items, try cleaning the throttle body, it causes a lot of problems on these trucks., First trip to the dealer I had codes p0575, p0700,p0703, p0856 Second trip to the dealer I had codes u0073, p0700, p0856 I picked the car up last night and they said "we can't find anything wrong, just some historical codes". Apparently on Monday morning when I shut off the engine it archived the codes and the car functioned normally upon restart., To diagnose the P0856 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.