Conditions for illuminating the MIL

Misfire Type 1:

• If a type 1 misfire (catalyst damaging) occurs once, the MIL blinks once per second, a Temporary DTC is stored, and the high rpm fuel injection stop system activates. The fuel injection stops, at high rpm only, on the cylinder that has the highest misfire counts. The MIL then continues to blink and the fuel injection stays off at high rpm, until the drive is completed.
• If a type 1 misfire occurs during a second drive cycle, the MIL and fuel injection behave the same and a DTC is stored.
• After a type 1 misfire has been detected during two drive cycles, the MIL comes on and stays on solid beginning with the third drive cycle, unless the Temporary DTC has been cleared by the ECM/PCM*. Even if the MIL is on, it will start blinking if a type 1 misfire occurs.
• If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.

Misfire Type 2:

If a type 2 misfire (emission-related but not severe enough to immediately damage the catalyst) occurs, a Temporary DTC is stored, but the MIL does come on or blink. If a type 2 misfire occurs during a second drive cycle, the MIL comes on and stays on unless the Temporary DTC has been cleared by the ECM/PCM*.

* The temporary DTC is erased under these conditions:

• The vehicle is operated under the same driving conditions as the first misfire detection, and no misfire is detected.
• 80 drive cycles are completed with no misfire detected.