OBD-II code · Powertrain (generic, extended)
P2194 System Too Rich at Higher Load (Bank 2)
Bank 2 fuel trim hits the rich limit only at higher load. Often excessive fuel pressure, a stuck-closed MAF reading low, or coolant temperature signal stuck cold causing over-fuelling.
Is it safe to drive with P2194?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyFuel pressure too high
- PossibleMAF reads low under load
Symptoms
- Check engine light on
- Increased fuel consumption
- Black smoke from exhaust on acceleration
- Smell of unburned fuel, fouled spark plugs
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Pressure Regulator, Mass Air Flow Sensor, Coolant Temperature Sensor
Related codes
- P0175System Too Rich (Bank 2)
- P2192System Too Rich at Higher Load (Bank 1)
- P2191System Too Lean at Higher Load (Bank 1)
- P2193System Too Lean at Higher Load (Bank 2)
- P2195O2 Sensor Signal Stuck Lean (Bank 1, Sensor 1)
- P2196O2 Sensor Signal Stuck Rich (Bank 1, Sensor 1)
- P2197O2 Sensor Signal Stuck Lean (Bank 2, Sensor 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.