OBD-II code · Powertrain (generic, extended)
P22E8 Cylinder 4 Alternative Fuel Injector Control Circuit Range/Performance
Cylinder 4 alternative-fuel injector is electrically OK but its response (current ramp, dwell, peak voltage) is off-spec — typically winding ageing.
Is it safe to drive with P22E8?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyWinding ageing
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Alternative Fuel Injector
Related codes
- P22DCCylinder 1 Alternative Fuel Injector Control Circuit Range/Performance
- P22E0Cylinder 2 Alternative Fuel Injector Control Circuit Range/Performance
- P22E4Cylinder 3 Alternative Fuel Injector Control Circuit Range/Performance
- P22E5Cylinder 4 Alternative Fuel Injector Control Circuit/Open
- P22ECCylinder 5 Alternative Fuel Injector Control Circuit Range/Performance
- P22F0Cylinder 6 Alternative Fuel Injector Control Circuit Range/Performance
- P22F4Cylinder 7 Alternative Fuel Injector Control Circuit Range/Performance
- P22F8Cylinder 8 Alternative Fuel Injector Control Circuit Range/Performance
- P22E6Cylinder 4 Alternative Fuel Injector Control Circuit Low
- P22E7Cylinder 4 Alternative Fuel Injector Control Circuit High
- P22E9Cylinder 5 Alternative Fuel Injector Control Circuit/Open
- P22EACylinder 5 Alternative Fuel Injector Control Circuit Low
- P22EBCylinder 5 Alternative Fuel Injector Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.