Advanced Diagnostics

Advanced Diagnostics - DTC P0201: No. 1 Injector Circuit Malfunction
DTC P0202: No. 2 Injector Circuit Malfunction
DTC P0203: No. 3 Injector Circuit Malfunction
DTC P0204: No. 4 Injector Circuit Malfunction

General Description






The injector supplies optimum fuel injection to the engine which is controlled by the powertrain control module (PCM) ON/ OFF command. The PCM monitors the injector condition, and if the return signal from the injector does not change for a specified time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






[ ]: HDS Parameter

Malfunction Threshold
The return signal from the injector does not change at least 31 times (counts once per one engine cycle). Possible Cause

Possible Cause

P0201
- No. 1 injector failure
- No. 1 injector INJ1 line open
- No. 1 injector INJ1 line short to ground
- No. 1 injector INJ1 line short to power
- No. 1 injector power supply line open

P0202
- No. 2 injector failure
- No. 2 injector INJ2 line open
- No. 2 injector INJ2 line short to ground
- No. 2 injector INJ2 line short to power
- No. 2 injector power supply line open

P0203
- No. 3 injector failure
- No. 3 injector INJ3 line open
- No. 3 injector INJ3 line short to ground
- No. 3 injector INJ3 line short to power
- No. 3 injector power supply line open

P0204
- No. 4 injector failure
- No. 4 injector INJ4 line open
- No. 4 injector INJ4 line short to ground
- No. 4 injector INJ4 line short to power
- No. 4 injector power supply line open

Common
- PCM internal circuit failure

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.