P129E 2017 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 2017 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 2017 GMC Sierra Description
What are the Possible Causes of the DTC P129E 2017 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 2017 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 2017 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.
Need more information about the P129E 2017 GMC Sierra code?
Need more information on how to fix the P129E 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P129E 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P129E 2017 GMC Sierra Code
1. What does the OBDII code P129E mean on a 2017 GMC Sierra?
P129E indicates that the Fuel Pump Driver Control Module (FPCM) has detected an issue with the signal message counter, suggesting communication errors between the module and other components.
2. What are the common symptoms of code P129E in a 2017 GMC Sierra?
Symptoms may include poor engine performance, difficulty starting, reduced fuel efficiency, or the check engine light illuminating.
3. What causes the P129E code on a GMC Sierra?
Common causes include wiring or connection issues, a malfunctioning Fuel Pump Driver Control Module, or software-related communication errors.
4. Can a faulty fuel pump cause the P129E code?
While the fuel pump itself may not directly cause this code, issues with the fuel pump driver module, which controls the pump, can trigger it.
5. How do you diagnose P129E on a 2017 GMC Sierra?
Diagnosis involves checking for damaged wiring, loose connections, inspecting the FPCM, and using a scan tool to monitor module communication data.
6. Is the P129E code serious?
Yes, it can lead to poor engine performance or starting issues, so it’s important to address it promptly to avoid further complications.
7. How do you fix the P129E code on a GMC Sierra?
Repairs may include fixing damaged wiring, securing loose connections, reprogramming the FPCM, or replacing the module if it’s faulty.
8. Can I drive with the P129E code active?
While the vehicle may still run, driving with this code active isn’t recommended as it may cause reduced performance or further damage to the fuel system.
9. Does the P129E code require module reprogramming?
In some cases, updating or reprogramming the Fuel Pump Driver Control Module with the latest software can resolve communication errors.
10. How much does it cost to repair the P129E code on a 2017 GMC Sierra?
Costs can vary depending on the issue but typically range from $150 to $600, including diagnostics, wiring repairs, or module replacement.
Discuss the causes and fixes for P129E 2017 GMC Sierra OBDII Code
Code P129E 2017 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.
