DTC Troubleshooting: P0301 (71), P0302 (72), P0303 (73), P0304 (74)
  1. Check for continuity between body ground and the appropriate ECM connector terminal of the problem cylinder (see table).
    PROBLEM CYLINDER
    DTC
    ECM TERMINAL
    WIRE COLOR
    No. 1
    P0301
    C15
    YEL/GRN
    No. 2
    P0302
    C16
    BLU/RED
    No. 3
    P0303
    C17
    WHT/BLU
    No. 4
    P0304
    C18
    BRN

Is there continuity?
YES -
Repair short in the wire between the ECM and the ignition coil, then go to Step 60 .
NO -
Go to Step 38 .