P129E 2017 GMC Sierra Code - Fuel Pump Driver Control Module Signal Message Counter Incorrect
Quick Answer
The P129E code on a 2017 GMC Sierra indicates a problem with the Fuel Pump Driver Control Module (FDCM) signal message counter being incorrect. Common causes include Faulty fuel pump driver control module, Wiring or connection issues in the fuel pump system, Malfunctioning fuel pump. 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 driver control module, Wiring or connection issues in the fuel pump system, Malfunctioning fuel pump.
- 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.
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Code P129E 2017 GMC Sierra Description
The P129E code on a 2017 GMC Sierra indicates a problem with the Fuel Pump Driver Control Module (FDCM) signal message counter being incorrect. The FDCM is responsible for controlling the fuel pump operation in the vehicle. When this code appears, it means that the signal message counter for the FDCM is not within the expected range, which can lead to issues with the fuel pump's functionality. This can result in a variety of performance issues and potentially cause long-term damage if not addressed promptly.
Common Causes of P129E 2017 GMC Sierra
- Faulty fuel pump driver control module
- Wiring or connection issues in the fuel pump system
- Malfunctioning fuel pump
- Electrical problems in the vehicle's system
- Software or programming issues in the control module
Symptoms of P129E 2017 GMC Sierra
- Engine misfires or hesitation during acceleration
- Reduced fuel efficiency
- Engine stalling or difficulty starting
- Illumination of the check engine light
- Rough idling or uneven engine performance
How to Fix P129E 2017 GMC Sierra
- Diagnose the specific cause of the P129E code using a diagnostic scanner to pinpoint the exact issue.
- Inspect the wiring and connections in the fuel pump system for any damage or loose connections.
- Test the fuel pump driver control module to determine if it is functioning correctly or needs replacement.
- Replace any faulty components, such as the fuel pump driver control module or the fuel pump itself.
- Clear the code from the vehicle's computer system and perform a test drive to ensure the issue has been resolved.
Cost to Fix P129E 2017 GMC Sierra
The cost of repairing a P129E code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the cost of parts and labor. In general, replacing a faulty fuel pump driver control module can range from $200 to $500, while a new fuel pump can cost between $150 and $400. Labor costs can add another $100 to $300 to the total repair bill. Overall, the total repair cost for addressing a P129E code can range from $350 to $1000. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of your vehicle.
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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.
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