With A/T

Diagnostic Trouble Code (DTC) P0300: Random misfire.





Troubleshooting
By test-driving, determine the conditions during which misfire occurs. Depending on these conditions, test in the order described in the table.













Advanced Diagnsotic Procedures


NOTE: If misfire doesn't recur, some possible causes are fuel that doesn't meet owners manual spec, lack of fuel, carbon deposits on spark plug, etc.


NOTE: If some of the DTCs listed below are stored at the same time as a misfire DTC, troubleshoot those DTCs first, then recheck for the misfire DTC.

P0107, P0108: MAP sensor
P0131, P0132: HO2S
P0171, P0172: Fuel metering
P0401, P1491, P1498: EGR System*1
P0505: Idle Control System
P1253: VTEC System*2
P1361, P1362: TDC sensor
P1381, P1382: CYP sensor
P1508: IAC valve

Possible Cause
- Fuel pump insufficient fuel pressure, amount of flow
- Fuel line clogging, blockage, leakage
- Fuel filter clogging
- Fuel pressure regulator stuck open
- EGR system malfunction*1
- Distributor malfunction
- Ignition coil wire open, leakage
- Ignition control module malfunction
- Valves carbon deposit
- Compression low
- VTEC system malfunction*2
- Fuel does not meet Owner's Manual spec., lack of fuel
- HO2S
- HO2S circuit

*1: D16Y5 engine
*2: D16Y5, D16Y8, B16A2 engine