OBD-II code · Powertrain (generic)
P01C4 Fuel Pressure Sensor A Circuit Range/Performance
Fuel pressure sensor A reading implausible. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P01C4?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor reading drifted
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Pressure Sensor A
Related codes
- P018BFuel Pressure Sensor B Circuit Range/Performance
- P01C1Fuel Rail Pressure Sensor Circuit High Bank 2
- P01C2Fuel Rail Pressure Sensor Circuit Intermittent/Erratic Bank 2
- P01C3Fuel Pressure Sensor A Circuit
- P01C5Fuel Pressure Sensor A Circuit Low
- P01C6Fuel Pressure Sensor A Circuit High
- P01C7Fuel Pressure Sensor A Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.