Powertrain, generic · Fuel and air metering

P01C2 Fuel Rail Pressure Sensor Circuit Intermittent/Erratic Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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. P01C2 covers jumps or dropouts in the signal of the bank 2 sensor – the counterpart of P0194, for which GM uses a jump of more than 15 MPa between samples 6.25 ms apart. Loose contacts and corroded connectors are the typical causes. No manufacturer document using exactly this code was found; the logic follows the bank 1 sensor and CARB's circuit monitoring requirement.

Likely causes

Corrosion or wear at sensor and harness contacts
Harness chafed or loose contact
Rail pressure sensor faulty internally

Symptoms

  • Check engine light on (depending on manufacturer)
  • Brief stumbling
  • Often no symptoms

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

P0194P01BEP01BFP01C0P01C1

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