Powertrain
generic / SAE
P029D
Cylinder 1 - Injector Leaking
Cylinder 1 injector leaking fuel between commanded openings. 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 / 9D
Possible causes
- Injector seal or nozzle worn high
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–1000 €
- Estimated time: 1–5 h
- Component: injector cyl1
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012