P0201
DTC P0201, P0202, P0203, or P0204
Circuit Description
The control module enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The control module controls each fuel injector by grounding the control circuit via a solid state device called a driver. The control module monitors the status of each driver. If the control module detects an incorrect voltage for the commanded state of the driver, a fuel injector control circuit DTC sets.
DTC Descriptors
This diagnostic procedure supports the following DTCs:
* DTC P0201 Injector 1 Control Circuit
* DTC P0202 Injector 2 Control Circuit
* DTC P0203 Injector 3 Control Circuit
* DTC P0204 Injector 4 Control Circuit
Conditions for Running the DTC
* The engine is running.
* The ignition voltage is more than 11 volts for 5 seconds.
* DTC P0201-P0204 run continuously once the above conditions are met.
Conditions for Setting the DTC
* The control module detects an incorrect voltage on the fuel injector control circuit.
* The above condition is met for 5 seconds.
Action Taken When the DTC Sets
* The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
* The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
Conditions for Clearing the MIL/DTC
* The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
* A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
* A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
* Clear the MIL and the DTC with a scan tool.
Diagnostic Aids
* Performing the Fuel Injector Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis (w/J39021 or w/Tech 2) Fuel Injector Diagnosis (w/CH47976). Fuel Injector Diagnosis (w/J39021 or w/Tech 2) Fuel Injector Diagnosis (With CH 47976)
* For an intermittent condition, refer to Intermittent Conditions. Intermittent Conditions
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