OBD-II code · Powertrain (generic, extended)
P22F7 Cylinder 8 Alternative Fuel Injector Control Circuit High
Cylinder 8 alternative-fuel injector drive line stuck high — short to B+. 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.
Is it safe to drive with P22F7?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyShort to B+
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- P22DBCylinder 1 Alternative Fuel Injector Control Circuit High
- P22DFCylinder 2 Alternative Fuel Injector Control Circuit High
- P22E3Cylinder 3 Alternative Fuel Injector Control Circuit High
- P22E7Cylinder 4 Alternative Fuel Injector Control Circuit High
- P22EBCylinder 5 Alternative Fuel Injector Control Circuit High
- P22EFCylinder 6 Alternative Fuel Injector Control Circuit High
- P22F3Cylinder 7 Alternative Fuel Injector Control Circuit High
- P22F5Cylinder 8 Alternative Fuel Injector Control Circuit/Open
- P22F4Cylinder 7 Alternative Fuel Injector Control Circuit Range/Performance
- P22F6Cylinder 8 Alternative Fuel Injector Control Circuit Low
- P22F8Cylinder 8 Alternative Fuel Injector Control Circuit Range/Performance
- P22F9NOx Sensor Performance - Slow Response Low to High (Bank 1 Sensor 1)
- P22FANOx Sensor Performance - Slow Response High to Low (Bank 1 Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.