Powertrain
generic / SAE
P0235
Turbocharger/Supercharger Boost Sensor "A" Circuit
The ECU detected an electrical fault in the primary (A) boost pressure sensor circuit. The signal does not match plausibility checks against MAP, RPM, and load. With no boost feedback, the ECU typically limits boost via the wastegate.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 35
Possible causes
- Boost pressure sensor failed high
- Wiring or connector fault medium
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–400 €
- Estimated time: 0.3–2 h
- Component: boost pressure sensor
- Component: boost sensor wiring
- Component: turbocharger
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012