P0263
HighP0263 — Cylinder 1 Contribution Fault
Description
What P0263 Means
P0263 indicates that cylinder 1 isn't contributing its share of engine power. A faulty fuel injector, low compression, or other mechanical problems can cause this. Injector problems are common on diesel engines.
Symptoms
Symptoms
- Misfires
- Rough idle
- Power loss
- Check Engine light
Causes and fixes
Diagnosis and Repair
- Run an injector test.
- Check fuel pressure.
- Inspect the injector for leaks or clogging.
- Replace the injector if needed.
Possible secondary damage
Downstream Problems
Ignoring OBD codes and the related symptoms can lead to complete failure of the injection system and leave the car immobile.