Code Enable Criteria
- Engine has been off for longer than 7 hours and 30 minutes.
- Start-up IAT is greater than 50°F (10°C).
- Vehicle has traveled at greater than 10 MPH.
- IAT has increased by at least 5.4°F (3°C).
- No IAT or ECT DTCs are set.
DTC sets when the difference between start-up ECT and IAT is greater than 27°F (15°C).