P0262
DTC P0201-P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P1248, P1249, P124A, P124B, P2147, P2148, P2150, P2151, P2153, P2154, P2156, or P2157
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 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 P1248
- Cylinder 1 Injector High Control Circuit Shorted to Control Circuit
DTC P1249
- Cylinder 2 Injector High Control Circuit Shorted to Control Circuit
DTC P124A
- Cylinder 3 Injector High Control Circuit Shorted to Control Circuit
DTC P124B
- Cylinder 4 Injector High Control Circuit Shorted to Control Circuit
DTC P2147
- Cylinder 1 Injector High Control Circuit Low Voltage
DTC P2148
- Cylinder 1 Injector High Control Circuit High Voltage
DTC P2150
- Cylinder 2 Injector High Control Circuit Low Voltage
DTC P2151
- Cylinder 2 Injector High Control Circuit High Voltage
DTC P2153
- Cylinder 3 Injector High Control Circuit Low Voltage
DTC P2154
- Cylinder 3 Injector High Control Circuit High Voltage
DTC P2156
- Cylinder 4 Injector High Control Circuit Low Voltage
DTC P2157
- Cylinder 4 Injector High Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The engine control module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel injector by grounding the high voltage control circuit of the fuel injector. The ECM monitors the status of the injector high voltage supply circuits and the fuel injector high voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled.
Conditions for Running the DTC
* DTC P062B is not set.
* The engine is running for greater than 5 s.
* The ignition voltage is greater than 11 V.
* The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
P0201, P0202, P0203, or P0204
The ECM detects the injector high voltage supply circuit or the injector high voltage control circuit is open for greater than 1 s.
P0261, P0264, P0267, or P0270
The ECM detects the injector high voltage control circuit is shorted to ground for greater than 1 s.
P0262, P0265, P0268, or P0271
The ECM detects the injector high voltage control circuit is shorted to voltage for greater than 1 s.
P1248, P1249, P124A, or P124B
The ECM detects the injector high voltage supply circuit is shorted to the injector high voltage control circuit for greater than 1 s.
P2147, P2150, P2153, or P2156
The ECM detects the injector high voltage supply circuit is shorted to ground for greater than 1 s.
P2148, P2151, P2154, or P2157
The ECM detects the injector high voltage supply circuit is shorted to voltage for greater than 1 s.
Action Taken When the DTC Sets
DTCs P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P1248, P1249, P124A, P124B, P2147, P2148, P2150, P2151, P2153, P2154, P2156, and P2157 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P1248, P1249, P124A, P124B, P2147, P2148, P2150, P2151, P2153, P2154, P2156, and P2157 are Type A DTCs.
Diagnostic Aids
* Performing the fuel injector coil test may help isolate an intermittent condition. Refer to Fuel Injector Solenoid Coil Test Fuel Injector Solenoid Coil Test.
* If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool Injector Control Circuit Status parameters. An Injector Control Circuit Status parameter will change from OK or Not Run to Malfunction if there is a condition with the circuit or a connection.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Sunshade - Left
Description and Operation
Fuel System Description Fuel System Description
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 Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify DTC P0685 or P1682 is not set.
• If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
• If none of the DTCs are set
3. Verify DTC P0201, P0202, P0203, P0204, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P1248, P1249, P124A, P124B, P2147, P2148, P2150, P2151, P2153, P2154, P2156, or P2157 is not set.
• If any of the DTCs are set
Refer to Circuit/System Testing
• If none of the DTCs are set
4. Engine running.
5. Verify the scan tool Current Misfire Counter parameters are not incrementing.
• If the Current Misfire Counters are incrementing
Refer to Circuit/System Testing
• If the Current Misfire Counters are not incrementing
6. Verify the scan tool Cylinder 1-4 Injector Control Circuit Status parameters display OK.
• If the Cylinder 1-4 Injector Control Circuit Status parameters display Malfunction
Refer to Circuit/System Testing.
• If the Cylinder 1-4 Injector Control Circuit Status parameters display OK
7. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
8. Verify the DTC does not set.
• If the DTC sets
Refer to Circuit/System Testing
• If the DTC does not set
9. All OK.
Circuit/System Testing
1. Ignition OFF, disconnect the fuel injector multi-way harness connector X160, ignition ON.
2. Verify the scan tool Cylinder 1-4 Injector Control Circuit Status parameters display Open.
• If the parameters do not display Open
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
2. Test for infinite resistance between the appropriate high voltage supply circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 1 V between the high voltage control circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K20 Engine Control Module.
• If the parameters display Open
3. Ignition ON, connect a test lamp between the appropriate high voltage supply circuit and the high voltage control circuit.
4. Verify the scan tool Injector Control Circuit Status transitions from Open to OK.
• If the parameter displays Open
1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
2. Test for less than 2 ohms in the high voltage supply circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms
3. Test for infinite resistance between the high voltage control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
4. Test for less than 1 V between the high voltage supply circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K20 Engine Control Module.
• If the parameter displays OK
Note: Testing for the following steps 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.
6. Test for infinite resistance between the high voltage supply circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, test or replace the Q17 fuel injector(s).
7. Test for 2-3 ohms between the high voltage supply circuit and high voltage control circuit.
• If less than 2 ohms
1. Test for infinite resistance between the appropriate high voltage supply circuit or high voltage control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, test the Q17 fuel injector for a short and replace as necessary.
• If greater than 3 ohms
1. Disconnect the harness connector at the Q17 fuel injector.
2. Test for less than 2 ohms in the high voltage supply circuit or high voltage control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, test the Q17 fuel injector for an open/high resistance and replace as necessary.
• If between 2-3 ohms
8. Test or replace the Q17 fuel injectors.
Component Testing
* Fuel Injector Solenoid Coil Test Fuel Injector Solenoid Coil Test
* Fuel Injector Balance Test Fuel Injector Balance Test
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Fuel Injector Replacement Service and Repair
* Control Module References Control Module References for ECM replacement, setup, and programming