OBD-II code · Powertrain (generic)
P012A Turbocharger/Supercharger Inlet Pressure Sensor A Circuit
Generic electrical fault on turbo/supercharger inlet pressure sensor A. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
Is it safe to drive with P012A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Turbo Inlet Pressure Sensor A, Sensor Wiring
Related codes
- P0127Intake Air Temperature Too High
- P0128Coolant Thermostat Below Regulating Temperature
- P0129Barometric Pressure Too Low
- P012BTurbocharger/Supercharger Inlet Pressure Sensor A Circuit Range/Performance
- P012CTurbocharger/Supercharger Inlet Pressure Sensor A Circuit Low
- P012DTurbocharger/Supercharger Inlet Pressure Sensor A Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.