Mechanics

PONTIAC GRAND AM FUEL INJECTOR PROBLEM

2002 Pontiac Grand Am • 175,000 miles

Trouble code p0205
Code definition injector circuit malfunction-cylinder 5

How would I go about checking this an what are some possible problems
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April 4, 2013.



CIRCUIT DESCRIPTION
The powertrain control module (PCM) enables the appropriate fuel injector on the intake stroke for each cylinder. A voltage is supplied directly to the fuel injectors. The PCM controls each fuel injector by grounding the control circuit via a solid state device called a driver. The PCM monitors the status of each driver. If the PCM detects an incorrect voltage for the commanded state of the driver, a fuel injector control DTC sets.

CONDITIONS FOR RUNNING THE DTC
The engine is running.
The ignition voltage is between 9-18 volts.
CONDITIONS FOR SETTING THE DTC
The PCM detects an incorrect voltage on the fuel injector control circuit.
The condition exists for 30 seconds.
ACTION TAKEN WHEN THE DTC SETS
The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
CONDITIONS FOR CLEARING THE MIL/DTC
The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
Clear the MIL and the DTC with a scan tool.
DIAGNOSTIC AIDS
Performing the Fuel Injector Coil test may help isolate an intermittent condition. Refer to Fuel Injector Coil Test. See: Powertrain Management\Computers and Control Systems\Testing and Inspection\Component Tests and General Diagnostics
If the condition is intermittent, refer to Intermittent Conditions. See: Powertrain Management\Computers and Control Systems\Testing and Inspection\Initial Inspection and Diagnostic Overview\Diagnostic Strategies\Intermittent Conditions