P003A OBD-II: Turbocharger/Supercharger Boost Control "A" Position Exceeded
P003A Severity
Should you fix P003A yourself?
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
What causes OBD-II fault code P003A?
The Turbocharger Vane Control Solenoid controls the amount of boost produced by the turbocharger. Every time the key is cycled, the engine computer (PCM) runs a self-check to verify the Turbocharger Vane Control Solenoid and related sensors are working properly. The PCM will command the solenoid to fully open and close. If the PCM does not see the Turbocharger Vane Control Solenoid open and close as requested, the PCM assumes that the calibration has been lost or there is another fault with the turbocharger. Code P003A will set.A relearn procedure must be performed any time the Turbocharger or related components are repaired or replaced.
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What Does P003A Code Mean?
OBD-II Code P003A is defined as a Turbocharger/Supercharger Boost Control "A" Position Exceeded
The Turbocharger Vane Control Solenoid controls the amount of boost produced by the turbocharger. Every time the key is cycled, the engine computer (PCM) runs a self-check to verify the Turbocharger Vane Control Solenoid and related sensors are working properly. The PCM will command the solenoid to fully open and close. If the PCM does not see the Turbocharger Vane Control Solenoid open and close as requested, the PCM assumes that the calibration has been lost or there is another fault with the turbocharger. Code P003A will set.A relearn procedure must be performed any time the Turbocharger or related components are repaired or replaced.
P003A Symptoms
- Engine may enter limp home mode (reduced performance)
- Lack of boost from the turbo/supercharger
Common Problems That Trigger the P003A Code
- Manual turbocharger vane position relearn procedure
- Powertrain Control Module (PCM) failure
- Turbocharger vane control solenoid failure
- Turbocharger vane position sensor failure
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