Code 25

DTC 25 - Air-Fuel Ratio Lean Malfunction

Purpose of the driving pattern:
* To simulate diagnosis code detecting condition after diagnosis code is recorded.
* To check that the malfunction is corrected when the repair is completed confirming that the diagnosis code is no longer detected.

DTC 25 - Air-Fuel Ratio Lean Malfunction & DTC 26 - Air-Fuel Ratio Rich Malfunction:

1. Disconnect the fuse EFI (15 A) for 10 seconds or more, with IG switch OFF.
2. Initiate test mode (Connect terminal TE2 and E1 of check connector with IG switch OFF.
3. Start the engine and warm the engine up, with all ACC switch OFF.
4. After the engine is warmed up, let it idle for 3 minutes.
5. After performing idling in step 4, perform sudden racing to 4,000 rpm three times.
6. After performing sudden racing in step 5, perform driving at 31 - 60 mph (Engine rpm 2,000 rpm) for 90 seconds.

HINT: If a malfunction is detected, the "CHECK" engine warning light will light up during step 6.

NOTICE: If this procedure is not strictly followed, you can not detect the malfunctions.