Powertrain, generic · Fuel and air metering

P01BF Fuel Rail Pressure Sensor Circuit Range/Performance 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. P01BF is the plausibility fault of the bank 2 sensor, the counterpart of P0191. GM documents it on the LT6 as an 'internal component fault' of the sensor, appearing together with codes for low rail pressure at start (P00C6), pressure regulation at its limit and injector faults: a wrong 12-pin intermediate connector to the bank 2 rail let water in. The fix was a new engine/injector harness and rail pressure sensor. Thresholds are not published; GM's dual-channel comparison on bank 1 (1.0 MPa) suggests similar logic. On a fault the module uses a substitute value and usually limits power.

Likely causes

Water or corrosion at the bank 2 intermediate connector (GM LT6: wrong 12-pin connector)
Bank 2 rail pressure sensor faulty internally
Genuine pressure fault on bank 2 (pump, control valve)

Symptoms

  • Check engine light on
  • Reduced power
  • Starting problems (with P00C6)
  • Misfires with injector codes at the same time

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

P0191P01BEP01C0P01C1P01C2P00C6

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