OBD-II code · Powertrain (generic)
P0271 Cylinder 4 Injector Circuit High
Cylinder 4 Injector Circuit High: the signal voltage is above the expected range. This affects fueling of the associated cylinders.
Is it safe to drive with P0271?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyInjector circuit shorted to supply
- PossibleWiring or connector fault
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Injector, Injector Wiring
Related codes
- P0262Cylinder 1 Injector Circuit High
- P0265Cylinder 2 Injector Circuit High
- P0268Cylinder 3 Injector Circuit High
- P026ECharge Air Cooler Coolant Pump A Performance
- P026FCoolant Thermostat Performance
- P0270Cylinder 4 Injector Circuit Low
- P0272Cylinder 4 Contribution/Balance Fault
- P0273Cylinder 2 Contribution/Balance
- P0274Cylinder 5 Injector A Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.