P01C2 code meaning
Fuel Rail Pressure Sensor Circuit Intermittent/Erratic Bank 2
Powertrain system Generic code P01xx codes Check engine light
What P01C2 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. 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.
P01C2 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 3.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P01C2
- Check engine light on (depending on manufacturer)
- Brief stumbling
- Often no symptoms
Common causes of P01C2
- Most likelyCorrosion or wear at sensor and harness contacts
- PossibleHarness chafed or loose contact
- PossibleRail pressure sensor faulty internally
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 P01C2 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. |
| C2 | The exact fault in that area. |
What to do next
- Note P01C2 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 P01C2
What does P01C2 mean?
P01C2 means "Fuel Rail Pressure Sensor Circuit Intermittent/Erratic 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 P01C2?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P01C2 fail an emissions test?
Yes, it can. P01C2 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 P01C2 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 P01C2 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.