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 injector supplies fuel to the engine and is controlled by the powertrain control module (PCM) ON/OFF command. In the PCM, the injector driver receives a drive commands from the CPU and drives the injector. The CPU monitors a terminal voltage of PCM by the return signal circuit. 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
Execution
Continuous
Sequence
None
Duration
5 seconds or more (at idle)
DTC Type
One drive cycle, MIL on

Enable Conditions
Condition
Minimum
Maximum
12 volt battery voltage [BATTERY]
10.0 V
-
State of the engine
Running
Other
Other than during fuel cut-off operation
[ ]: HDS Parameter

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

DTC: 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

DTC: 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

DTC: 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 12 volt battery.