Powertrain
generic / SAE
P0291
Cylinder 11 Injector A Circuit Low
Cylinder 11 injector A control voltage below expected range. A flow-deviating injector throws off cylinder balance — adjacent cylinders run leaner/richer to compensate, often masking the root cause until the trim limit is hit.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 91
Possible causes
- Wiring shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–2 h
- Component: injector cyl11
- Component: injector wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012