Powertrain
generic / SAE
P0271
Cylinder 4 Injector Circuit High
The cylinder 4 injector control circuit voltage is below the lower diagnostic threshold — open winding, short to ground, or wiring fault. The ECU disables the injector to protect the driver stage.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 71
Possible causes
- Injector circuit shorted to supply high
- Wiring or connector fault medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–3 h
- Component: fuel injector
- Component: injector wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012