Grand Prix V8-5.3L (2007)
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The engine is running.
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The ignition voltage is more than 11 volts.
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DTC P0201-P0208 runs continuously when the above conditions are met.
Conditions for Setting the DTC
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The control module detects an incorrect voltage on the fuel injector control circuit.
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The above condition is met for 1 second.
Action Taken When the DTC Sets
DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0207, and P0208 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0207, and P0208 are Type B DTCs.
Diagnostic Aids
Performing the Fuel Injector Diagnosis may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis (w/J39021 or w/Tech 2) Fuel Injector
Diagnosis (w/CH47976). See: Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector
Diagnosis (w/J39021 or w/Tech 2) See: Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel
Injector Diagnosis (With CH 47976)
Special Tools Required
J 34730-405 Injector Test Lamp
Circuit/System Testing
1. Ignition OFF, disconnect the affected fuel injector harness connector at the fuel injector.
2. Ignition ON, verify that a test lamp illuminates between the ignition 1 voltage circuit terminal A and ground.
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If the test lamp does not illuminate, test the ignition 1 voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal
and the ignition 1 voltage circuit fuse is open, test or replace the fuel injector.
3. Connect the J 34730-405 between the control circuit terminal B and the ignition 1 voltage circuit terminal A.
4. Command the fuel injector ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
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If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the ECM.
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If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the
ECM.
5. If all circuits test normal, test or replace the fuel injector.
Component Testing
Important: The engine coolant temperature (ECT) sensor must be between 10-32°C (50-90°F) for an accurate measurement.
Measure for 11-14 ohms of resistance between the terminals of the fuel injector.
If the resistance is not within the specified range, replace the fuel injector.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. See: Computers and Control Systems/Testing and
Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification Tests and Procedures
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Control Module References for ECM replacement, setup, and programming See: Testing and Inspection/Programming and Relearning
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Fuel Injector Replacement
