P0204

DTC P0201, P0202, P0203 or P0204 Injector Control Circuit

Circuit Description

The ECM calculates the optimum fuel injection ON time using data sent from various engine sensors. The ECM supplies a high-voltage along with grounding the fuel injector control circuit when it needs to energize the fuel injector (turn it ON). The ECM also supplies battery voltage at all times to the charge voltage circuit in order to verify circuit integrity. If the fuel injector charge voltage circuit or solenoid control circuit is open circuit DTC P0201 P0202 P0203 or P0204 will set depending upon which cylinder circuit failed.

Condition for Running the DTC

^ The battery voltage is between 10 to 16 volts.
^ The ignition switch is ON.
^ The engine is running.

Condition for Setting the DTC

^ The ECM detects an open circuit on the fuel injector solenoid circuits.

Action Taken When the DTC Sets

^ The ECM illuminates the MIL when the diagnostic runs and fails. Refer to DTC Type Definitions for Action Taken When the DTC Sets - Type A.
^ The ECM limits fuel injection quantity.
^ The ECM inhibits EGR control.
^ The ECM inhibits DPF regeneration control.
^ The ECM inhibits cruise control.

Condition for Clearing the DTC

^ Refer to DTC Type Definitions for Condition for Clearing the MIL/DTC - Type A.

Diagnostic Aids

^ If an intermittent condition is suspected refer to Intermittent Conditions in this section.

Notice: Each DTC agrees with engine cylinder order.

^ P0201: Cylinder #1
^ P0202: Cylinder #2
^ P0203: Cylinder #3
^ P0204: Cylinder #4

Circuit/System Testing DTC P0201, P0202, P0203 or P0204