P0202
DTC P0201, P0202, P0203, or P0204
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 Descriptor
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
Diagnostic Fault Information
Circuit/System Description
The engine control module (ECM) enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The ECM controls each fuel injector by grounding the control circuit via a solid state device called a driver. The ECM monitors the status of each driver. If the ECM detects an incorrect voltage for the commanded state of the driver, a fuel injector control circuit DTC sets.
Conditions for Running the DTC
* The engine is running.
* The ignition voltage is greater than 11 V for greater than 5 s.
* These DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
* The ECM detects an incorrect voltage on the fuel injector control circuit.
* The above condition is met for greater than 6 s.
Action Taken When the DTC Sets
DTCs P0201, P0202, P0203, and P0204 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0201, P0202, P0203, and P0204 are Type B DTCs.
Diagnostic Aids
* High resistance in the circuits of the injectors may set a misfire DTC without setting an injector DTC. Test the injector circuits of the affected cylinders for a high resistance if you suspect a condition.
* Performing the Fuel Injector Solenoid Coil Test may help isolate an intermittent condition.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
* Fuel System Description Fuel System Description
* Hybrid Modes of Operation Description Hybrid Modes of Operation 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 Programming and Relearning for scan tool information
Special Tools
J 34730-2C - Test Lamp
For equivalent regional tools, refer to Special Tools (Diagnostic Tools) Special Tools (Diagnostic Tools).
Circuit/System Verification
1. Engine running, observe the following control circuit status parameters:
* Cylinder 1-4 Injector Control Circuit Low Voltage Test Status
* Cylinder 1-4 Injector Control Circuit Open Test Status
* Cylinder 1-4 Injector Control Circuit High Voltage Test Status
Each parameter should toggle between OK and Not Run or Not Run and OK.
2. Observe the DTC information with a scan tool. DTCs P0201, P0202, P0203, or P0204 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 you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Vehicle OFF, disconnect the harness connector at the appropriate Q17 fuel injector.
2. Vehicle in Service Mode, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all components connected to the ignition circuit and replace as necessary.
3. Test for 2.5-3.5 V between the control circuit terminal 2 and ground.
• 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 ECM.
• If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
4. Vehicle OFF, connect a J 34730-2C - Test Lamp to the Q17 fuel injector harness connector.
5. Engine running, the test lamp should flash.
• If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.
• 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 K20 ECM.
6. If all circuits test normal, test or replace the Q17 fuel injector.
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 Programming and Relearning for ECM replacement, setup, and programming