Diagnosing Fault Codes EFI-611 and EFI-612

BACKGROUND:

Some customers have seen the Malfunction Indicator Lamp (MIL) coming on. The cause has been leakage in the fuel evaporative system. Fault codes EFI-611, EFI-612.

In many cases the root cause is, that the customer fills up the gas tank with the engine running, or does not tighten the gas cap.

This is a quick test to perform when fault tracing these DTC:s, before performing any other repair.





Method

- Check and tighten the gas cap.
- Ignition on.
- Erase DTC:s.
- Gear in P or N position.
- Warm up engine (above 7O°C / 158°F).
- Let engine idle.
- A/C off.
- Use menu of diagnose test.
^ Select Activate Diagnosis
^ Select Leakage Diagnosis
- Run the diagnose. Can take up to 2 minutes.
- If the run doesn't go through switch off the engine and restart.
- Read fault codes.

Note: If the texts "START CONDITIONS NOT MET" or "DIAGNOSTIC INTERRUPT" appears, this can have several causes: High fuel evaporation, high canister charge, high tank pressure, fuel trim not active or a DTC posted after the diagnostic has been activated. Check that no DTC:s are stored, restart the car and activate the diagnostic. Several attempts can be required.

Does the fault code reoccur?

No:
^ The DTC was posted due to idling during filling up, or the gas cap was not tightened.

Yes:
^ Perform the remaining fault tracing proceedures within this section.
^ See: Trouble Code Conditions