OBD-II code · Powertrain (generic)
P03A7 Cylinder 2 Pressure Variation High
Cylinder-to-cylinder pressure variation on cylinder 2 is above the calibrated maximum — combustion is unstable cycle-to-cycle, typical of partial misfire or injector seat erosion.
Is it safe to drive with P03A7?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyPartial misfire or injector seat erosion
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- Parts involved
- Cylinder Pressure Sensor, Fuel Injector
Related codes
- P039DCylinder 1 Pressure Variation High
- P039FCylinder 2 Pressure Sensor Circuit
- P03B1Cylinder 3 Pressure Variation High
- P03BBCylinder 4 Pressure Variation High
- P03C5Cylinder 5 Pressure Variation High
- P03CFCylinder 6 Pressure Variation High
- P03D9Cylinder 7 Pressure Variation High
- P03E3Cylinder 8 Pressure Variation High
- P2350Cylinder 9 Pressure Variation High
- P235ACylinder 10 Pressure Variation High
- P2364Cylinder 11 Pressure Variation High
- P236ECylinder 12 Pressure Variation High
- P03A4Cylinder 2 Pressure Too Low
- P03A5Cylinder 2 Pressure Too High
- P03A6Cylinder 2 Pressure Variation Low
- P03A8Cylinder 2 Combustion Performance
- P03A9Cylinder 3 Pressure Sensor Circuit
- P03AACylinder 3 Pressure Sensor Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.