Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with the turbocharger or supercharger on one side of the engine. It's like when a toy's battery runs out and it can't go fast anymore.
The car's computer monitors the boost pressure from the turbocharger or supercharger. If it detects that the boost is being cut off unexpectedly on Bank 2, it triggers this code.
The P129F code indicates that the Engine Control Module (ECM) has detected an issue with the boost control system for the turbocharger or supercharger on Bank 2. This could be due to a malfunction in the boost pressure sensor, a problem with the wastegate actuator, or a restriction in the intake system.
• Reduced engine power
• Check Engine Light on
• Poor acceleration
• Faulty boost pressure sensor
• Malfunctioning wastegate actuator
• Intake system restriction
Turbocharger: A device that increases an engine's efficiency and power output by forcing extra air into the combustion chamber.
Wastegate: A valve that controls the flow of exhaust gases to the turbocharger, regulating boost pressure.
• Use an OBD-II scanner to confirm the code.
• Inspect the boost pressure sensor and wiring for damage.
• Check the wastegate actuator for proper operation.
• Replace the boost pressure sensor if faulty.
• Repair or replace the wastegate actuator.
• Clear any obstructions in the intake system.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• BMW 3 Series
• Regularly inspect turbocharger components.
• Ensure intake system is free of obstructions.
• Maintain proper oil levels and quality.
Engine Performance
• Avoid heavy acceleration until the issue is resolved.
• Get the vehicle checked by a professional mechanic.
• Monitor for any changes in vehicle performance.
Check with the vehicle manufacturer for warranty coverage on turbocharger components.
This code is often seen in vehicles with forced induction systems and can be caused by both electronic and mechanical failures.
Moderate – It should be addressed soon to prevent further engine performance issues.
Driving with a malfunctioning turbocharger can lead to reduced performance and increased emissions.
• Engine at operating temperature
• Vehicle under load
The turbocharger is typically located near the exhaust manifold on the engine.
Q: Can I drive with a P129F code?
A: It's not recommended to drive for extended periods as it can lead to further engine issues.
Q: What happens if I ignore the P129F code?
A: Ignoring the code can result in decreased performance and potential damage to the turbocharger system.
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