P01BF code meaning
Fuel Rail Pressure Sensor Circuit Range/Performance Bank 2
Powertrain system Generic code P01xx codes Check engine light
What P01BF means
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.
P01BF at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 3.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P01BF
- Check engine light on
- Reduced power
- Starting problems (with P00C6)
- Misfires with injector codes at the same time
Common causes of P01BF
- Most likelyWater or corrosion at the bank 2 intermediate connector (GM LT6: wrong 12-pin connector)
- PossibleBank 2 rail pressure sensor faulty internally
- Less likelyGenuine pressure fault on bank 2 (pump, control valve)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel rail pressure sensor bank2Sensor wiringSensor reference voltage
What each part of P01BF means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1 | Area: fuel and air metering. |
| BF | The exact fault in that area. |
What to do next
- Note P01BF and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P01BF
What does P01BF mean?
P01BF means "Fuel Rail Pressure Sensor Circuit Range/Performance Bank 2". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P01BF?
Drive gently and only to a workshop. With P01BF the car can go into limp mode (reduced power) to protect itself.
Will P01BF fail an emissions test?
Yes, it can. P01BF is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P01BF to fix?
Difficulty: medium. A typical repair takes 0.5 to 3.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P01BF clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.