P219A fault code: what it means
P219A: Bank 1 air-fuel ratio imbalance between cylinders; one cylinder is running richer or leaner than the others.
Usual causes, most likely first
- leaking, clogged or sticking injector on one cylinder
- intake leak at one runner
- worn spark plug or failing coil on one cylinder
Not sure what P219A means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.