P219ECylinder 3 Air-Fuel Ratio Imbalance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P219E points at cylinder 3. Two bulletins show that a mixture code does not always mean a fuel part. Audi stored P219C to P21A1, one code per affected cylinder, on 2010 to 2012 S4, S5 and A6 with the 3.0 TFSI because of an incorrect software setting; the fix was new engine software and, in a later revision, a new crankcase pressure regulating valve. Lexus traced P219A and P219C to P219F on the 2.0 turbo 8AR-FTS (NX, IS, RC, GS 2015 onward) to compression lost through exhaust valves with worn guides, sometimes with misfire codes and reduced engine power, and repaired the cylinder head. Toyota's 2015 Tacoma V6 bulletin also starts with a leak-down test. For a lone P219E, test the cylinder 3 injector and compression before replacing sensors; the bank sensor itself is shared by all cylinders.
- What you may notice
- Check engine light on
- Possible P0303 or rough running
- Reduced engine power in severe cases
- Likely causes
- PossibleExhaust valve leakage at cylinder 3 (e.g. worn guides on Lexus 8AR-FTS)
- PossibleCylinder 3 injector delivering the wrong amount
- PossibleIncorrect ECM software setting (e.g. Audi 3.0 TFSI)
- RareFaulty crankcase pressure regulating valve
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.