P0267
DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277 (LAU)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0201
- Cylinder 1 Injector Control Circuit
DTC P0202
- Cylinder 2 Injector Control Circuit
DTC P0203
- Cylinder 3 Injector Control Circuit
DTC P0204
- Cylinder 4 Injector Control Circuit
DTC P0205
- Cylinder 5 Injector Control Circuit
DTC P0206
- Cylinder 6 Injector Control Circuit
DTC P0261
- Cylinder 1 Injector Control Circuit Low Voltage
DTC P0262
- Cylinder 1 Injector Control Circuit High Voltage
DTC P0264
- Cylinder 2 Injector Control Circuit Low Voltage
DTC P0265
- Cylinder 2 Injector Control Circuit High Voltage
DTC P0267
- Cylinder 3 Injector Control Circuit Low Voltage
DTC P0268
- Cylinder 3 Injector Control Circuit High Voltage
DTC P0270
- Cylinder 4 Injector Control Circuit Low Voltage
DTC P0271
- Cylinder 4 Injector Control Circuit High Voltage
DTC P0273
- Cylinder 5 Injector Control Circuit Low Voltage
DTC P0274
- Cylinder 5 Injector Control Circuit High Voltage
DTC P0276
- Cylinder 6 Injector Control Circuit Low Voltage
DTC P0277
- Cylinder 6 Injector Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The control module enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition voltage is supplied directly to the fuel injectors. The control module controls each fuel injector by grounding the control circuit with a solid state device called a driver. The control module monitors the status of each driver. Each driver has a feedback voltage circuit which the Engine Control Module (ECM) monitors. The injector control circuits are pulled-up to voltage within the ECM. The ECM can determine if a control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.
Conditions for Running the DTC
* The engine speed is greater than 80 RPM.
* The ignition voltage is between 10-18 V.
* The fuel injector has been commanded ON and OFF at least once.
* The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
P0201, P0202, P0203, P0204, P0205, or P0206
The ECM detects the injector control circuit is open for greater than 4 s or for a cumulative of 50 s.
P0261, P0264, P0267, P0270, P0273, or P0276
The ECM detects the injector control circuit is shorted to ground for greater than 4 s or for a cumulative of 50 s.
P0262, P0265, P0268, P0271, P0274, or P0277
The ECM detects the injector control circuit is shorted to voltage for greater than 4 s or for a cumulative of 50 s.
Action Taken When the DTC Sets
DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 are Type B DTCs.
Diagnostic Aids
* Performing the fuel injector coil test may help isolate an intermittent condition. Refer to Fuel Injector Solenoid Coil Test (LAU) (Fuel Injector Solenoid Coil Test)Fuel Injector Solenoid Coil Test (LF1, LFW) (Fuel Injector Solenoid Coil Test).
* If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the circuit status for the component with a scan tool. The circuit status parameter changes from OK or Not Ran to Fault if there is a condition with the circuit or a connection.
Reference Information
Schematic Reference
Engine Controls Schematics (LAU) ([1][2]Electrical Diagrams)Engine Controls Schematics (LF1) ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
Fuel System Description (LF1) (Description and Operation)Fuel System Description (LAU or LY7) (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
1. Observe the scan tool Cylinder 1-6 Current Misfire Counter. The Cylinder 1-6 Current Misfire Counters should not increment.
2. Engine operating, observe the scan tool DTC information. DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 should not set.
3. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.
Circuit/System Testing
1. Ignition OFF, disconnect the fuel injector multi-way harness connector X145.
Note: Testing for steps 2 through 4 is performed on the ECM side of the multi-way harness connector.
2. Ignition ON, connect a test lamp between each ignition circuit terminal 1/2 and ground. The test lamp should illuminate at each ignition circuit.
• If the test lamp does not illuminate, test the ignition circuits for a short to ground, or an open/high resistance. If the circuits test normal and the ignition circuit fuse is open, test or replace the appropriate Q17 fuel injector.
3. Test for 2.6-4.6 V between the appropriate fuel injector control circuit listed below and ground.
* Injector 1 terminal 3
* Injector 2 terminal 6
* Injector 3 terminal 4
* Injector 4 terminal 7
* Injector 5 terminal 5
* Injector 6 terminal 8
• If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.
• If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.
4. Probe the appropriate fuel injector control circuit listed below with a test lamp connected to B+. Engine cranking, verify the test lamp flashes.
* Injector 1 terminal 3
* Injector 2 terminal 6
* Injector 3 terminal 4
* Injector 4 terminal 7
* Injector 5 terminal 5
* Injector 6 terminal 8
• If the test lamp remains OFF, test the control circuit for a high resistance. If the circuit/connections test normal, replace the K20 Engine Control Module.
Note: Testing for steps 5 and 6 is performed on the fuel injector side of the multi-way harness connector. It may be necessary to remove the intake manifold to isolate the condition.
5. Ignition OFF, test for infinite resistance between the ignition voltage circuit terminal listed below and ground.
* Injector 1 terminal 3
* Injector 2 terminal 6
* Injector 3 terminal 4
* Injector 4 terminal 7
* Injector 5 terminal 5
* Injector 6 terminal 8
• If not the specified value, repair the ignition voltage, or control circuit, for a short to ground. If the circuits/connections test normal, test or replace the appropriate Q17 fuel injector.
6. Test for 12-16 ohm between the appropriate ignition voltage circuit terminal 1 or 2 and each fuel injector control circuit listed below.
* Injector 1 terminal 3
* Injector 2 terminal 6
* Injector 3 terminal 4
* Injector 4 terminal 7
* Injector 5 terminal 5
* Injector 6 terminal 8
• If less than the specified range, test for a short between the control circuit and the ignition voltage circuit. If the circuits/connections test normal, test or replace the appropriate Q17 fuel injector.
• If greater than the specified range, test the ignition voltage, and fuel injector control circuit, for an open/high resistance. If the circuits/connections test normal, test or replace the appropriate Q17 fuel injector.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Fuel Injector Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for Engine Control Module replacement, setup, and programming