EngineLightCodes
Powertrain code

P01C0 Fuel Rail Pressure Sensor Circuit Low Bank 2

Severity
Fix soon
Typical repair cost
$90–$770
Do it yourself
Possible, medium
Shop time
0.5–3.5 hours

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.

How the engine computer detects it

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 liter LT6 (Corvette Z06 2023–2024) with a digital sensor per rail. P01C0 means the signal of the bank 2 sensor is too low – the counterpart of P0192: a signal wire shorted to ground or an open 5 V reference. On bank 1 GM's diesels use below 4.3 % 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.

Written from public technical sources and not yet checked by a mechanic. How we write these pages

Symptoms

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

Common causes

  1. Signal wire shorted to ground, harness chafed Most likely
  2. 5 V reference open or shorted Possible
  3. Connector corroded or loose Possible
  4. Rail pressure sensor faulty internally Possible

How to diagnose P01C0

  1. Read every stored code with an OBD-II scanner. If misfire or fuel trim codes are there too, fix those first: they often cause this one.
  2. Inspect the parts involved: fuel rail pressure sensor bank2, sensor wiring, sensor reference voltage.
  3. Work through the causes above from most to least likely, cheapest checks first.
  4. Clear the code and drive a full drive cycle to confirm the repair held.

Reading the code

P
Powertrain
0
Generic (SAE) code
1
Fuel and air metering
C0
Specific fault

Questions drivers ask

Can I drive with code P01C0?

Drive gently and only as far as you need to. The engine computer may limit power to protect the engine, so avoid highways and heavy traffic until it's fixed. If the check engine light starts flashing, pull over.

Will my car pass an emissions inspection with P01C0?

Probably not in states that test vehicles with an OBD-II scan: an emissions-related code that keeps the check engine light on is usually an automatic fail. Rules differ by state and county, so check yours.

Can I fix P01C0 myself?

Often yes, with an OBD-II scanner and basic tools. Difficulty: medium. Start with the cheapest checks before replacing expensive parts.

This page is general information, not a substitute for a professional diagnosis. Repair costs are rough estimates for parts and labor and vary by vehicle and region.