P230C code meaning
Cylinder 3 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance
Powertrain system Generic code P23xx codes Check engine light
What P230C means
P230C is the balance-limit code for cylinder 3. On three-cylinder engines this is the last cylinder of the row; on fours and larger engines it sits further inside. The engine control trims the fuel of each cylinder separately to even out mixture differences, and P230C means the trim for cylinder 3 is used up. No manufacturer documents this exact code publicly and the NHTSA index lists no bulletin for it. Comparable data come from VW, whose 2014 Beetle table derives the plain imbalance codes from a per-cylinder fuel correction found by deliberate leaning, and from Mercedes, whose M260/M264 bulletins blame a leaking valve seat when cylinder 3 shows irregular mixture formation. A compression and leak-down test on cylinder 3 is worth doing before injectors are swapped.
P230C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 6 hours
- Clears after repairAfter a drive cycle
Symptoms of P230C
- Check engine light on
- Rough idle, possibly misfire on cylinder 3
- Higher fuel consumption or exhaust smell
Common causes of P230C
- Most likelyInjector of cylinder 3 delivering too much or too little (deposits, wear)
- PossibleAir leak at the intake port or injector seal of cylinder 3
- PossibleValve of cylinder 3 not sealing (worn seat or guide), low compression
- Less likelyPoor contact at the connector of injector 3
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injector cyl 3Intake manifoldCylinder compression
What each part of P230C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3 | Area: ignition system or misfire. |
| 0C | The exact fault in that area. |
What to do next
- Note P230C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P230C
What does P230C mean?
P230C means "Cylinder 3 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance". P230C is the balance-limit code for cylinder 3. It is a generic code, so it means the same on every make.
Is it safe to drive with P230C?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P230C fail an emissions test?
Yes, it can. P230C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P230C to fix?
Difficulty: medium. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P230C clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.