OBD Guide
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P129E

Fuel Pump Driver Control Module Signal Message Counter Incorrect

P129E is an OBD-II diagnostic trouble code meaning: Fuel Pump Driver Control Module Signal Message Counter Incorrect. Common causes: malfunction of the fuel pump control module, wiring harness damage. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Unstable engine operation
  • Problems starting the engine
  • Power Loss
  • Increased fuel consumption
  • Check Engine Light Is On

Causes

  • Malfunction of the fuel pump control module
  • Wiring harness damage
  • Bad contacts in connectors
  • Module power problems
  • ECU malfunction

How to Fix

  1. Check the integrity of wiring and connectors
  2. Diagnose the fuel pump control module
  3. Check the power supply and ground of the module
  4. Replace the control module if necessary
  5. Flash or replace the ECU if a malfunction is detected

Related codes

P129FP129DP0230

FAQ

What does the P129E code mean?

P129E is an OBD-II diagnostic trouble code that indicates: Fuel Pump Driver Control Module Signal Message Counter Incorrect

What causes a P129E error code?

The most common causes of P129E include: Malfunction of the fuel pump control module; Wiring harness damage; Bad contacts in connectors; Module power problems.

How do I fix a P129E diagnostic trouble code?

To fix P129E: Check the integrity of wiring and connectors. Diagnose the fuel pump control module. Check the power supply and ground of the module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P129E?

Limited driving only, diagnose soon

How much does it cost to fix P129E?

The estimated repair cost for P129E is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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