P129F Buick Code - Fuel Pump Driver Control Module Fuel Pump Speed Signal Incorrect
Quick Answer
The Fuel Pump Driver Control Module sends reports of the actual fuel pump speed to the Engine Control Module (ECM) as serial data every 10 ms. Common causes include Faulty Fuel Pump and Level Sensor Assembly, Fuel Pump and Level Sensor Assembly harness is open or shorted, Fuel Pump and Level Sensor Assembly 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
- P129F Buick indicates Fuel Pump Driver Control Module Fuel Pump Speed Signal Incorrect.
- Common causes
- Common causes include Faulty Fuel Pump and Level Sensor Assembly, Fuel Pump and Level Sensor Assembly harness is open or shorted, Fuel Pump and Level Sensor Assembly 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 P129F Buick Description
the calibrated range for greater than 7 s.
What are the Possible Causes of the DTC P129F Buick?
- Faulty Fuel Pump and Level Sensor Assembly
- Fuel Pump and Level Sensor Assembly harness is open or shorted
- Fuel Pump and Level Sensor Assembly circuit poor electrical connection
- Faulty Fuel Pump Driver Control Module
How to Fix the DTC P129F Buick?
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 P129F Buick 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 P129F Buick code?
Need more information on how to fix the P129F Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P129F Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P129F Buick Code
1. What are the common symptoms of OBDII code P129F in a Buick related to the Fuel Pump Driver Control Module?
The common symptoms include rough idling, engine stalling, difficulty starting the vehicle, and decreased fuel efficiency.
2. What could be causing the OBDII code P129F in a Buick related to the Fuel Pump Driver Control Module?
Possible causes include a faulty fuel pump driver control module, wiring issues, a defective fuel pump, or a problem with the fuel pump speed signal.
3. How can I diagnose the OBDII code P129F in my Buick?
Diagnosis involves using a scan tool to read the code, checking the fuel pump driver control module and related wiring for any visible damage, and testing the fuel pump speed signal.
4. What are some repair tips for fixing OBDII code P129F in a Buick?
Repair tips include replacing the fuel pump driver control module if it's faulty, repairing any damaged wiring, testing and potentially replacing the fuel pump, and ensuring proper connection of the fuel pump speed signal.
5. Can OBDII code P129F in a Buick be fixed at home, or should I seek professional help?
While some DIY enthusiasts may attempt to diagnose and repair this code at home, it is recommended to seek professional help, especially if you are not experienced with automotive electrical systems.
6. Is it safe to continue driving my Buick with the OBDII code P129F related to the Fuel Pump Driver Control Module?
It is not recommended to drive your vehicle with this code present, as it can lead to engine performance issues and potentially cause further damage to the fuel system.
7. How much does it typically cost to repair OBDII code P129F in a Buick?
The cost of repair can vary depending on the specific cause of the code, but it may range from $200 to $600 or more, including parts and labor.
8. Can a faulty fuel pump driver control module trigger other OBDII codes besides P129F in a Buick?
Yes, a faulty fuel pump driver control module can potentially trigger other related codes such as P129E or P129D, indicating different issues with the fuel pump speed signal.
9. What steps can I take to prevent OBDII code P129F from occurring in my Buick?
Regularly maintaining your vehicle, including checking the fuel system components, wiring, and fuel pump driver control module, can help prevent this code from occurring.
10. Is OBDII code P129F specific to Buick vehicles, or can it occur in other car makes and models?
While the specific code P129F may be specific to Buick vehicles, similar issues related to the fuel pump driver control module and fuel pump speed signal can occur in other car makes and models as well.
Discuss the causes and fixes for P129F Buick OBDII Code
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at 45mph my 2021 Envision shut off. would not restart. Engine turned over but no fire. Waited about 10 min. and it fired up. Check engine light on. P129F fault code. Dealer says fuel pump module bad?
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According to a national database of repairs and the factory service manual, the fuel pump is the most probable cause of the problem. The Fuel Pump Driver Control Module could also cause this problem, but it's not as common as the fuel pump. The dealer should be able to perform the necessary tests on both components to determine exactly what the problem is.
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