OBD-II code · Powertrain (generic)
P0270 Cylinder 4 Injector Circuit Low
Cylinder 4 Injector Circuit Low: the signal voltage is below the expected range. This affects fueling of the associated cylinders.
Is it safe to drive with P0270?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyInjector winding failed open
- 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
- P0261Cylinder 1 Injector Circuit Low
- P0264Cylinder 2 Injector Circuit Low
- P0267Cylinder 3 Injector Circuit Low
- P026DFuel Injection Quantity A Higher Than Expected
- P026ECharge Air Cooler Coolant Pump A Performance
- P026FCoolant Thermostat Performance
- P0271Cylinder 4 Injector Circuit High
- P0272Cylinder 4 Contribution/Balance Fault
- P0273Cylinder 2 Contribution/Balance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.