P129E Chevrolet Code - Fuel Pump Driver Control Module Signal Message Counter Incorrect
Quick Answer
The Fuel Pump Power Control Module is constantly sending serial data messages to the Engine Control Module (ECM) regarding the operating state of the fuel pump power control system. Common causes include Faulty Fuel Pump Power Control Module, Fuel Pump Power Control Module harness is open or shorted, Fuel Pump Power Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P129E Chevrolet indicates Fuel Pump Driver Control Module Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Fuel Pump Power Control Module, Fuel Pump Power Control Module harness is open or shorted, Fuel Pump Power Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P129E Chevrolet Description
What are the Possible Causes of the DTC P129E Chevrolet?
- Faulty Fuel Pump Power Control Module
- Fuel Pump Power Control Module harness is open or shorted
- Fuel Pump Power Control Module circuit poor electrical connection
How to Fix the DTC P129E Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P129E Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Chevrolet Models
- P129E 2014 Chevrolet Silverado — Fuel Pump Driver Control Module Signal Message Counter Incorrect
- P129E 2015 Chevrolet Silverado — Fuel Pump Driver Control Module Signal Message Counter Incorrect
- P129E 2016 Chevrolet Silverado — Fuel Pump Driver Control Module Signal Message Counter Incorrect
- P129E 2017 Chevrolet Silverado — Fuel Pump Driver Control Module Signal Message Counter Incorrect
- P129E 2018 Chevrolet Silverado — Fuel Pump Driver Control Module Signal Message Counter Incorrect
Frequently Asked Questions about P129E Chevrolet Code
1. What does the OBDII code P129E mean on a Chevrolet?
The P129E code indicates that the Fuel Pump Driver Control Module (FPCM) has detected an issue with the signal message counter, which could affect fuel pump communication.
2. What are the common symptoms of a P129E code?
Symptoms may include engine stalling, difficulty starting, reduced engine power, or an illuminated check engine light.
3. What causes the P129E code to appear on a Chevrolet?
Common causes include a faulty Fuel Pump Driver Control Module (FPCM), wiring issues, poor electrical connections, or software glitches in the module.
4. Can I drive my Chevrolet with a P129E code?
It’s not recommended to drive with this code for extended periods, as it can lead to fuel delivery issues and potentially leave you stranded.
5. How is the P129E code diagnosed?
A technician will scan for codes, inspect the FPCM and related wiring, check for proper voltage signals, and verify communication between the FPCM and ECM.
6. How do I fix a P129E code on my Chevrolet?
Repairs may include replacing the Fuel Pump Driver Control Module, repairing damaged wiring, cleaning or tightening electrical connections, or reprogramming the module if a software issue is identified.
7. Can a P129E code be caused by a low battery voltage?
Yes, low battery voltage or power interruptions can cause communication errors and trigger this code.
8. Is the Fuel Pump Driver Control Module the same as the fuel pump?
No, the FPCM is an electronic module that controls the fuel pump's operation, while the fuel pump physically delivers fuel to the engine.
9. How much does it cost to fix a P129E code on a Chevrolet?
Repair costs can vary but typically range from $150 to $600, depending on whether the FPCM needs replacement or if wiring repairs are required.
10. Can a software update fix the P129E code?
In some cases, a software update to the Fuel Pump Driver Control Module or ECM may resolve the issue if the problem is related to programming errors.
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