OBD Guide
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P15F8

Automatic Braking Engine Torque Request Signal Message Counter Incorrect

P15F8 is an OBD-II diagnostic trouble code meaning: Automatic Braking Engine Torque Request Signal Message Counter Incorrect. Common causes: problems with the can bus, brake control module malfunction. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Unstable operation of the automatic braking system
  • Disabling Brake Assist
  • Malfunction indicator light comes on
  • Problems with adaptive cruise control
  • Recording an error in the fault log

Causes

  • Problems with the CAN bus
  • Brake control module malfunction
  • Software error in the engine ECU
  • Damage to wiring between modules
  • Low voltage on-board network

How to Fix

  1. Check CAN bus connections
  2. Scan both modules for errors
  3. Check the integrity of the wiring between the modules
  4. Update ECU software
  5. Check the on-board voltage

Related codes

P15F7P15F9P1600

FAQ

What does the P15F8 code mean?

P15F8 is an OBD-II diagnostic trouble code that indicates: Automatic Braking Engine Torque Request Signal Message Counter Incorrect

What causes a P15F8 error code?

The most common causes of P15F8 include: Problems with the CAN bus; Brake control module malfunction; Software error in the engine ECU; Damage to wiring between modules.

How do I fix a P15F8 diagnostic trouble code?

To fix P15F8: Check CAN bus connections. Scan both modules for errors. Check the integrity of the wiring between the modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P15F8?

Yes, but get it checked soon

How much does it cost to fix P15F8?

The estimated repair cost for P15F8 is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat