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 thinks the sensor that checks how much boost the turbo or supercharger is making is reading too high. It's like when a thermometer says it's way hotter than it really is.
The P25F5 code is triggered when the Engine Control Module (ECM) detects a voltage signal from the turbocharger/supercharger boost sensor C that is higher than the specified range.
The boost sensor C is responsible for monitoring the pressure generated by the turbocharger or supercharger. If the sensor signal is too high, it indicates that the sensor might be faulty or there is an issue with the wiring or connections, leading to incorrect pressure readings.
• Check Engine Light is on
• Poor engine performance
• Reduced fuel efficiency
• Faulty boost sensor C
• Wiring issues such as shorts or open circuits
• Faulty ECM
Turbocharger: A device that increases an engine's efficiency and power output by forcing extra air into the combustion chamber.
Supercharger: A device that increases the pressure of air entering the engine to increase power.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the boost sensor C.
• Test the boost sensor C for proper operation.
• Replace the boost sensor C if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regular maintenance checks
• Ensure proper sensor installation
• Keep wiring and connectors clean
Sensor Issue
• Have the vehicle inspected by a professional.
• Avoid heavy acceleration until repaired.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been more common in turbocharged engines as they rely heavily on accurate boost pressure readings.
Moderate – It's important to address this issue to prevent further engine performance problems.
Driving with a faulty boost sensor can lead to reduced performance and increased emissions, which may not comply with local regulations.
• Engine running
• Turbocharger engaged
The boost sensor C is typically located near the intake manifold or on the turbocharger/supercharger itself.
Q: Can I drive with a P25F5 code?
A: It's possible, but not recommended as it can lead to poor performance and increased emissions.
Q: How do I clear the P25F5 code?
A: After repairs, use an OBD-II scanner to clear the code. If it returns, further diagnosis is needed.
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