P230BCylinder 2 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P230B singles out cylinder 2: its individual fuel correction has reached the limit during cylinder balancing and the imbalance remains. Audi is one of the few makers whose use of the code is on record. Its 2020 bulletin 2060348 for the A6 2.0 TFSI of the third EA888 generation explains that a calibration mistake filed a cylinder 2 imbalance under P230E, the cylinder 5 code, instead of the correct P230B; the guided fault finding still tested cylinder 2. P219D is the plain imbalance code for this cylinder and P0302 its misfire counter. Typical root causes are an injector delivering too much or too little, a leaking intake port seal or a valve that no longer closes tightly. The MIL is lit and the engine may idle unevenly.
- What you may notice
- Check engine light on
- Rough idle, possibly misfire on cylinder 2
- Higher fuel consumption or exhaust smell
- Likely causes
- LikelyInjector of cylinder 2 delivering too much or too little (deposits, wear)
- PossibleAir leak at the intake port or injector seal of cylinder 2
- PossibleValve of cylinder 2 not sealing (worn seat or guide), low compression
- RareCalibration error in the cylinder assignment (Audi 2.0 TFSI Gen 3, bulletin 2060348)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.