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

General Description

The powertrain control module (PCM) monitors the injector driver for electrical malfunctions. The driver of the injector is continuously monitored until the fault counter reaches a defined threshold. If the PCM detects abnormal conditions for a specified time, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
0.5 second or more
DTC Type
One drive cycle, MIL on

Enable Conditions
Condition
Minimum
Maximum
12 volt battery voltage [Battery]
8 V
16 V
Vehicle
ON mode
[ ]: HDS Parameter

Malfunction Threshold
The PCM detects short (short to ground, short to power, or short to another line) or an open in injector circuits at least 3 times.

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.
DTC: P0201
No. 1 injector INJ H1 line open
No. 1 injector INJ H1 line short to power
No. 1 injector INJ H1 line short to ground
No. 1 injector INJ L1 line open
No. 1 injector INJ L1 line short to power
No. 1 injector INJ L1 line short to ground
No. 1 injector INJ H1 line short to No. 1 injector INJ L1 line
No. 1 injector failure

DTC: P0202
No. 2 injector INJ H2 line open
No. 2 injector INJ H2 line short to power
No. 2 injector INJ H2 line short to ground
No. 2 injector INJ L2 line open
No. 2 injector INJ L2 line short to power
No. 2 injector INJ L2 line short to ground
No. 2 injector INJ H2 line short to No. 2 injector INJ L2 line
No. 2 injector failure

DTC: P0203
No. 3 injector INJ H3 line open
No. 3 injector INJ H3 line short to power
No. 3 injector INJ H3 line short to ground
No. 3 injector INJ L3 line open
No. 3 injector INJ L3 line short to power
No. 3 injector INJ L3 line short to ground
No. 3 injector INJ H3 line short to No. 3 injector INJ L3 line
No. 3 injector failure

DTC: P0204
No. 4 injector INJ H4 line open
No. 4 injector INJ H4 line short to power
No. 4 injector INJ H4 line short to ground
No. 4 injector INJ L4 line open
No. 4 injector INJ L4 line short to power
No. 4 injector INJ L4 line short to ground
No. 4 injector INJ H4 line short to No. 4 injector INJ L4 line
No. 4 injector failure

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.