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P0856 Hummer Code - Traction Control Torque Request Circuit Malfunction

- Code Popularity: 2,733 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P0856 Hummer?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Electronic Brake Control Module (EBCM)
  • Electronic Brake Control Module Harness is open or shorted
  • Electronic Brake Control Module Circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
⚠ Does your Hummer have Safety Recalls? → Check here

How to Fix the DTC P0856 Hummer?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0856 Hummer 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.

What are Code Possible Symptoms?

  • ABS Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code P0856 Hummer Description

The Electronic Brake Control Module (EBCM) and the Engine Control Module (ECM) simultaneously control the traction control. The electronic brake control module sends a serial data message to the engine control module requesting torque reduction. When certain engine control module Diagnostic Trouble Codes (DTC) are set, the engine control module will not be able to perform the torque reduction for traction control. A serial data message is sent to the electronic brake control module indicating that traction control is not allowed.
The DTC will be set when the engine control module diagnoses a condition preventing the engine control portion of the traction control function and sends a serial data message to the electronic brake control module indicating that torque reduction is not allowed.

OBDII Code P0856 Hummer - Traction Control Torque Request Circuit Malfunction - AutoCodes.com
P0856 Hummer Code - Traction Control Torque Request Circuit Malfunction

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Code P0856 Hummer comments

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