P2194System Too Rich at Higher Load (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2194 means bank 2 has reached the lower limit of its trim in the upper load zone: the ECM is removing as much fuel as permitted, yet that bank still runs rich. Because air mass, fuel pressure and canister purge feed both banks, a rich error caused by them usually brings P2192 along. When P2194 stands alone, look at bank 2 itself: a leaking or over-delivering injector, an injector of the wrong flow class after a repair, or a bank 2 front sensor that reads lean so the controller keeps adding fuel. Comparing the trims of both banks while holding a high load on the road or a dynamometer separates the two cases. No manufacturer publishes P2194 criteria; GM uses P2180 with a factor limit of 0.78 for the corresponding range. The driver mainly sees higher consumption.
- What you may notice
- Check engine light on
- Increased fuel consumption
- Bank 2 long-term trim strongly negative at high load
- Likely causes
- LikelyLeaking or over-delivering injector on bank 2
- PossibleBank 2 front sensor reading lean
- PossibleAir mass sensor reading high or fuel pressure too high (usually with P2192)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.