P129A
Charge Air Pressure Sensor Run On Pressure Implausible
P129A is an OBD-II diagnostic trouble code meaning: Charge Air Pressure Sensor Run On Pressure Implausible. Common causes: boost pressure sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Reduced engine power
- Unstable engine operation
- The Check Engine light comes on
- Increased fuel consumption
- Dips during acceleration
Causes
- Boost pressure sensor malfunction
- Open or short circuit in the sensor circuit
- Damage to vacuum hoses
- Turbine or bypass valve malfunction
- Problems with the engine ECU
How to Fix
- Check the integrity of the sensor electrical circuit
- Check vacuum hoses for leaks
- Check the performance of the boost pressure sensor
- Check the mechanical part of the turbocharging system
- If necessary, replace the sensor or repair damage
Related codes
FAQ
What does the P129A code mean?
P129A is an OBD-II diagnostic trouble code that indicates: Charge Air Pressure Sensor Run On Pressure Implausible
What causes a P129A error code?
The most common causes of P129A include: Boost pressure sensor malfunction; Open or short circuit in the sensor circuit; Damage to vacuum hoses; Turbine or bypass valve malfunction.
How do I fix a P129A diagnostic trouble code?
To fix P129A: Check the integrity of the sensor electrical circuit. Check vacuum hoses for leaks. Check the performance of the boost pressure sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P129A?
Limited driving only, diagnose soon
How much does it cost to fix P129A?
The estimated repair cost for P129A is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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