P01C1Fuel Rail Pressure Sensor Circuit High Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The bank 2 rail pressure sensor measures the pressure in a second, separate high-pressure rail on V engines that have one rail with its own sensor per bank. Many V engines connect both rails and use only one sensor (P0190–P0194); the only documented user of the bank 2 codes is GM's 5.5 litre LT6 (Corvette Z06 2023–2024) with a digital sensor per rail. P01C1 means the signal of the bank 2 sensor is too high – the counterpart of P0193: an open sensor ground, a short to voltage or, with a pull-up, an open signal wire. On bank 1 GM's diesels use above 94.8 % of supply. No manufacturer document using exactly this code was found; the logic follows the bank 1 sensor and CARB's circuit monitoring requirement. On a fault the module uses a substitute value and usually limits power.
- What you may notice
- Check engine light on
- Limp mode or 'Reduced Engine Power'
- Hard starting, stalling
- Likely causes
- LikelySensor ground open or high-resistance
- PossibleSignal wire open (with pull-up) or shorted to voltage
- PossibleConnector corroded
- PossibleSensor faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.