Advanced Diagnostics

Advanced Diagnostics - DTC P0201: No. 1 Cylinder Injector Circuit Malfunction (Engine Type: R18Z1)
Advanced Diagnostics - DTC P0202: No. 2 Cylinder Injector Circuit Malfunction (Engine Type: R18Z1)
Advanced Diagnostics - DTC P0203: No. 3 Cylinder Injector Circuit Malfunction (Engine Type: R18Z1)
Advanced Diagnostics - DTC P0204: No. 4 Cylinder Injector Circuit Malfunction (Engine Type: R18Z1)

General Description






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

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






Enable Conditions






Malfunction Threshold
The return signal from the injector does not change at least 30 times (counts once per engine cycle).

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

P0201
- No. 1 injector failure
- No. 1 injector INJ_1 line open
- No. 1 injector INJ_1 line short to ground
- No. 1 injector INJ_1 line short to power
- No. 1 injector power supply line open

P0202
- No. 2 injector failure
- No. 2 injector INJ_2 line open
- No. 2 injector INJ_2 line short to ground
- No. 2 injector INJ_2 line short to power
- No. 2 injector power supply line open

P0203
- No. 3 injector failure
- No. 3 injector INJ_3 line open
- No. 3 injector INJ_3 line short to ground
- No. 3 injector INJ_3 line short to power
- No. 3 injector power supply line open

P0204
- No. 4 injector failure
- No. 4 injector INJ_4 line open
- No. 4 injector INJ_4 line short to ground
- No. 4 injector INJ_4 line short to power
- No. 4 injector power supply line open

Common
- ECM/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 ECM/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.