Powertrain
generic / SAE
P02A8
Cylinder 4 - Injector Restricted
Cylinder 4 injector flow restricted — partial blockage detected. 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 / A8
Possible causes
- Injector clogged high
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–800 €
- Estimated time: 1–4 h
- Component: injector cyl4
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012