Powertrain, generic · Fuel and air metering

P01C1 Fuel Rail Pressure Sensor Circuit High Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Sensor ground open or high-resistance
Signal wire open (with pull-up) or shorted to voltage
Connector corroded
Sensor faulty

Symptoms

  • Check engine light on
  • Limp mode or 'Reduced Engine Power'
  • Hard starting, stalling

Repair estimate

DifficultyMediumDIY possible
Parts and labour€80–700
Time0.5–3.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel rail pressure sensor bank2sensor wiringsensor reference voltage

Related codes

P0193P01BEP01BFP01C0P01C2

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.