Turbocharger Boost Control Position Sensor A Circuit Low
Position sensor A signal voltage below the lower limit — short to ground in the signal line or open reference voltage at the sensor.
Affected components
- Turbo actuator position sensor a
- Sensor wiring
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: Missing 5 V reference at the sensor
- Low likelihood: Connector pins corroded - high contact resistance
Possible symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.