DTC P0300-P0304: Random Cylinder Misfire Detected: Notes

NOTE: If DTCs P0107, P0108, P0131, P0132, P0171, P0172, P0401 (D16Y5 engine), P0505, P1128, P1129, P1253 (B16A2, D16Y5 or D16Y8 engine), P1361, P1362, P1381, P1382, P1491 (D16Y5 engine), P1498 (D16Y5 engine), and/or P1508 are set with random misfire DTCs, trouble shoot DTCs P0300-P0304 last.

If misfiring is frequent enough to trigger detection of increased emission during 2 consecutive driving cycles, Malfunction Indicator Light (MIL) will illuminate, and DTC P0300 and some combination of P0301-P0304 will be stored in memory. If misfiring is frequent enough to damage catalyst, MIL will blink whenever misfiring occurs, and DTC P0300 and some combination of P0301-P0304 will be stored in memory. When misfiring stops, MIL will still remain on.

Start engine and run at 3000 RPM with no loads and transmission in Park or Neutral until radiator fan comes on. Allow engine to idle. Test drive vehicle to verify symptom. If misfire does not recur check for low fuel quality (inadequate octane level), low or no fuel, or carbon deposits on spark plugs. Perform inspection and repair procedures in order listed according to symptom.