Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a sensor that checks the pressure where air goes into the turbocharger. It's like a sensor that tells if the air is being sucked in properly, and right now it's saying the pressure is too low.
The P012C code indicates that the Engine Control Module (ECM) has detected a low voltage signal from the turbocharger/supercharger inlet pressure sensor. This sensor measures the pressure of the air entering the turbocharger or supercharger.
The turbocharger/supercharger inlet pressure sensor is responsible for measuring the pressure of the air as it enters the forced induction system. A low circuit condition means that the sensor is sending a voltage signal to the ECM that is below the expected range. This could be due to a faulty sensor, wiring issues, or a problem with the ECM itself.
• Check Engine Light is on
• Reduced engine performance
• Poor acceleration
• Unusual engine noises
• Faulty turbocharger/supercharger inlet pressure sensor
• Wiring issues such as shorts or open circuits
• Faulty ECM
• Vacuum leaks
• Blocked or restricted air intake
ECM: Engine Control Module
Turbocharger: A device that increases an engine's efficiency and power output by forcing extra air into the combustion chamber
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connections to the sensor
• Check the sensor for damage or contamination
• Test the sensor's voltage output
• Inspect for vacuum leaks or intake obstructions
• Replace the faulty sensor
• Repair or replace damaged wiring
• Clear any obstructions in the air intake
• Repair any vacuum leaks
• Replace or reprogram the ECM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
• Vacuum gauge
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regular maintenance of air intake system
• Regular inspection of sensor wiring
• Ensure proper installation of aftermarket parts
Sensor Issue
• Do not ignore the Check Engine Light
• Avoid driving the vehicle hard until the issue is resolved
Check if the vehicle's powertrain warranty covers sensor issues.
This code has been reported in vehicles with forced induction systems, especially when sensors are exposed to harsh conditions.
Moderate – Address the issue soon to prevent further engine performance problems.
Driving with a faulty sensor may lead to increased emissions and reduced fuel efficiency.
• Engine at operating temperature
• Vehicle in a safe location
The turbocharger/supercharger inlet pressure sensor is typically located near the air intake of the turbocharger or supercharger.
Q: Can I drive with a P012C code?
A: It's not recommended to drive for extended periods with this code, as it can affect engine performance.
Q: How do I clear a P012C code?
A: After fixing the issue, use an OBD-II scanner to clear the code from the ECM.
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