Diagnostic Report: P219C
Cylinder 1 Air-Fuel Ratio Imbalance - Precision Analysis
Recommended Device
iCarsoft CR Pro S
iCarsoft CR Pro S
Technical Insight
The P219C fault code indicates that the Engine Control Module (ECM) has detected that Cylinder 1 is contributing significantly more or less to the overall air-fuel mixture than the other cylinders. Unlike generic lean/rich codes, this is气缸-specific, meaning the issue is isolated to the fueling or ignition of the first cylinder.
* Precision Diagnosis required to avoid unnecessary parts replacement *
Deep Dive Diagnostic Links
- Pro Tool: Elevate your garage with the iCarsoft CR Pro S - Shop Now.
- Related Guide: Dealing with low fuel pressure? Check our P228C Diagnostic Article.
- Technical Reference: Understand more about Vehicle Maintenance Standards at Car Care Council.
P219C FAQ
Will P219C cause a failed smog test?
Yes. Any AFR imbalance code will illuminate the CEL and lead to an immediate emissions test failure.
Can I swap fuel injectors to test?
Yes! A great diagnostic trick is swapping the Cyl 1 injector with Cyl 2. If the code changes to **P219D** (Cylinder 2 Imbalance), you've confirmed a bad injector.
