P129E 2014 GMC Sierra 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 2014 GMC Sierra 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 2014 GMC Sierra Description
What are the Possible Causes of the DTC P129E 2014 GMC Sierra?
- 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 2014 GMC Sierra?
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 2014 GMC Sierra 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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Frequently Asked Questions about P129E 2014 GMC Sierra Code
What does the OBDII code P129E mean for a 2014 GMC Sierra?
The code P129E indicates that the Fuel Pump Driver Control Module (FPCM) has detected an incorrect signal message counter, suggesting a communication error within the system.
What are the common symptoms of code P129E in a 2014 GMC Sierra?
Symptoms may include engine stalling, difficulty starting, reduced fuel efficiency, or the check engine light being illuminated.
What causes the P129E code in a 2014 GMC Sierra?
Common causes include a faulty Fuel Pump Driver Control Module, wiring or connector issues, or a software glitch in the control module.
How can I diagnose code P129E on my 2014 GMC Sierra?
Diagnose the issue by scanning the OBDII system, inspecting the FPCM and its wiring for damage, and checking for communication errors between the module and the ECM.
Can a bad fuel pump cause the P129E code?
While a bad fuel pump itself may not directly cause P129E, it can contribute to related issues if the FPCM is unable to properly regulate fuel delivery.
Is it safe to drive with the P129E code on my 2014 GMC Sierra?
Driving with this code is not recommended, as it may lead to engine performance issues, stalling, or further damage to the fuel system.
How do I fix the P129E code on my 2014 GMC Sierra?
Repairs may include replacing the Fuel Pump Driver Control Module, repairing wiring or connector issues, or updating the module’s software.
Can a software update fix code P129E?
Yes, in some cases, a software update for the Fuel Pump Driver Control Module can resolve communication issues causing the P129E code.
How much does it cost to fix code P129E on a 2014 GMC Sierra?
The cost can vary but typically ranges from $200 to $600, depending on whether repairs involve replacing the FPCM or addressing wiring issues.
Can a weak battery cause the P129E code to appear?
Yes, a weak or failing battery can cause voltage fluctuations, potentially triggering communication errors like the P129E code.
Discuss the causes and fixes for P129E 2014 GMC Sierra OBDII Code
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