P129E 2014 GMC Sierra Code - Fuel Pump Driver Control Module Signal Message Counter Incorrect
Quick Answer
The P129E diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Fuel Pump Driver Control Module Signal Message Counter is incorrect. Common causes include Faulty wiring or connectors, Malfunctioning fuel pump driver control module, ECM software issues. 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 wiring or connectors, Malfunctioning fuel pump driver control module, ECM software issues.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P129E 2014 GMC Sierra Description
The P129E diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Fuel Pump Driver Control Module Signal Message Counter is incorrect. This code typically points to a communication issue between the fuel pump driver control module and the engine control module (ECM). The fuel pump driver control module is responsible for regulating the fuel pump's operation, ensuring the proper fuel pressure is maintained for the engine's performance. When the signal message counter is incorrect, it means that the communication between these modules is not functioning as expected.
Common Causes of P129E 2014 GMC Sierra
- Faulty wiring or connectors
- Malfunctioning fuel pump driver control module
- ECM software issues
- Corrosion or damage to electrical components
- Poor electrical ground connections
Symptoms of P129E 2014 GMC Sierra
- Engine misfires
- Rough idling
- Poor acceleration
- Stalling
- Difficulty starting the vehicle
How to Fix P129E 2014 GMC Sierra
- Begin by inspecting the wiring and connectors between the fuel pump driver control module and the ECM. Look for any signs of damage, corrosion, or loose connections. Repair or replace any faulty wiring or connectors.
- Test the fuel pump driver control module to determine if it is functioning correctly. If the module is faulty, replace it with a new one.
- Check the ECM for any software issues or updates that may be required. Update the ECM software if necessary.
- Inspect the electrical ground connections for the fuel pump driver control module and ensure they are secure and free of corrosion. Clean or repair any faulty connections.
- Clear the DTC and perform a test drive to verify that the issue has been resolved.
Cost to Fix P129E 2014 GMC Sierra
The typical repair costs for addressing a P129E code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts for a new fuel pump driver control module can range from $150 to $300, while labor costs can range from $100 to $200. Additional costs may apply if wiring repairs or ECM software updates are needed. Overall, the total repair cost for this issue could range from $250 to $500. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate.
Need more information about the P129E 2014 GMC Sierra code?
Need more information on how to fix the P129E 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P129E 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
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
Code P129E 2014 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.