DTC Troubleshooting: P0201 (71), P0202 (72), P0203 (73), P0204 (74)
  1. Check for continuity between body ground and the appropriate ECM connector terminal (see table).
    PROBLEM CYLINDER
    DTC
    ECM TERMINAL No. (CONNECTOR)
    WIRE COLOR
    No. 1
    P0201
    74 (No. 1)
    BRN
    No. 2
    P0202
    49 (No. 1)
    RED
    No. 3
    P0203
    73 (No. 1)
    BLU
    No. 4
    P0204
    50 (No. 1)
    YEL

Is there continuity?
YES -
Go to Step 19 .
NO -
Repair open in the wire between the injector and the ECM, then go to Step 14 .
  1. Replace the problem injector.
  1. Reconnect all connectors.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Do the INJECTOR TEST in the INSPECTION MENU with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0201, P0202, P0203, and/or P0204 indicated?
YES -
Check for poor connections or loose terminals at the injector and the ECM, then go to Step 1 .
NO -
Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■
  1. Reconnect all connectors.
  1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
  1. Do the INJECTOR TEST in the INSPECTION MENU with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0201, P0202, P0203, and/or P0204 indicated?
YES -
Check for poor connections or loose terminals at the injector and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 21 . If the ECM was substituted, go to Step 1 .
NO -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■