OBD-II code · Powertrain (generic, extended)
P28B6 Cylinder 10 Ion Current Sense Circuit Low
Ion current from cylinder 10 is below the expected window. Spark plug fouled, signal wire shorted to ground, or sensing path interrupted.
Is it safe to drive with P28B6?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySpark plug fouled with carbon or oil
- PossibleSense wire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Spark Plug Cyl 10, Ignition Coil Cyl 10, Ion Sense Module
Related codes
- P2892Cylinder 1 Ion Current Sense Circuit Low
- P2896Cylinder 2 Ion Current Sense Circuit Low
- P289ACylinder 3 Ion Current Sense Circuit Low
- P289ECylinder 4 Ion Current Sense Circuit Low
- P28A2Cylinder 5 Ion Current Sense Circuit Low
- P28A6Cylinder 6 Ion Current Sense Circuit Low
- P28AACylinder 7 Ion Current Sense Circuit Low
- P28AECylinder 8 Ion Current Sense Circuit Low
- P28B2Cylinder 9 Ion Current Sense Circuit Low
- P28BACylinder 11 Ion Current Sense Circuit Low
- P28BECylinder 12 Ion Current Sense Circuit Low
- P28B3Cylinder 9 Ion Current Sense Circuit High
- P28B4Cylinder 10 Ion Current Sense Circuit
- P28B5Cylinder 10 Ion Current Sense Circuit Range/Performance
- P28B7Cylinder 10 Ion Current Sense Circuit High
- P28B8Cylinder 11 Ion Current Sense Circuit
- P28B9Cylinder 11 Ion Current Sense Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.