PGM-FI System

DTC Troubleshooting (cont'd)

11-379  

DTC P0300:

Random misfire and any Combination of the Following:

DTC P0301:

No. 1 Cylinder Misfire

DTC P0302:

No. 2 Cylinder Misfire

DTC P0303:

No. 3 Cylinder Misfire

DTC P0304:

No. 4 Cylinder Misfire


NOTE:

  1. Troubleshoot the following DTCs first if any of them were stored along with the random misfire DTC(s):

    P0107, P0108: Manifold Absolute Pressure (MAP) sensor

    P0131, P0132: Primary Heated Oxygen Sensor

    P0171, P0172: Fuel system

    P0335, P0336: Crankshaft Position (CKP) sensor

    P0401, P1491, P1498: Exhaust Gas Recirculation (EGR) system*

    P0505: Idle control system

    P1259: VTEC system*

    P1361, P1362: Top Dead Centre (TDC) sensor

    P1519: Idle Air Control (IAC) valve

    *: D16W7, D16V1 engines

  2. Test-drive the vehicle to verify the symptom.
  3. Find the symptom in the chart below, and do the related procedures in the order listed until you find the cause.

    Symptom

    Procedure(s)

    Also check for:

    Random misfire only at low RPM and under load

    Check fuel pressure (see page 11-431).

    • Low compression.
    • Low quality fuel.

    Random misfire only during acceleration

    Check fuel pressure (see page 11-431).

    Malfunction in the VTEC system (D16W7, D16V1 engine) (see page 6-9).

    Random misfire at high RPM, under load, or under random conditions

    Check fuel pressure (see page 11-431).

    Correct valve clearance (see page 6-14).