P2092
DTC P2088, P2090, P2092, or P2094
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 P2088
- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1
DTC P2090
- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 1
DTC P2092
- Intake Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 2
DTC P2094
- Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Bank 2
Circuit/System Description
The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is operating. The Camshaft Position Actuator Solenoid Valve signal from the ECM is pulse width modulated (PWM). The ECM controls the Camshaft Position Actuator Solenoid Valve duty cycle by controlling the amount of solenoid valve ON time. The Camshaft Position Actuator Solenoid Valve controls the advance or the retard of each camshaft. The Camshaft Position Actuator Solenoid Valve controls the oil flow that applies the pressure to advance or retard the camshafts.
The ECM controls the Camshaft Position Actuator Solenoid Valve by supplying a 12 V pulse width modulated (PWM) signal. The ECM supplies a ground to the low reference circuit.
Conditions for Running the DTC
* The ignition voltage is greater than 11 V.
* The ignition switch is in the Crank or Run position.
* The ECM commanded the Camshaft Position Actuator Solenoid Valve ON.
* DTCs P2088, P2090, P2092 and P2094 run continuously when the above conditions are met.
Conditions for Setting the DTC
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
Action Taken When the DTC Sets
DTCs P2088, P2090, P2092 and P2094 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P2088, P2090, P2092 and P2094 are Type B DTCs.
Diagnostic Aids
If the condition is intermittent, move the related harnesses and connectors, with the engine operating, while monitoring the scan tool circuit status parameters for the component. The circuit status parameters 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 ((LFX)) [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Camshaft Actuator System Description 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 Control Module References for scan tool information
Circuit/System Verification
Note: If a crankshaft or camshaft position sensor DTC is set, the Camshaft Position Actuator output control will not function.
1. Ignition ON.
2. Verify DTC P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, or P0391 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. Observe the appropriate control circuit status parameters listed below with a scan tool:
* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status Bank 1 or 2
* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status Bank 1 or 2
* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status Bank 1 or 2
• If Malfunction is displayed
Refer to Circuit/System Testing
• If OK or Not Run is displayed
4. Engine idling, command the appropriate Camshaft Position Actuator from 0-25° and back to 0° while observing the appropriate control circuit status parameters listed below with a scan tool:
* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status Bank 1 or 2
* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Open Test Status Bank 1 or 2
* The Intake/Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit High Voltage Test Status Bank 1 or 2
• If Malfunction is displayed
Refer to Circuit/System Testing
• If OK or Not Run is displayed
5. 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.
6. Verify a DTC does not set.
• If any DTC sets
Refer to Circuit/System Testing for further diagnosis.
• If a DTCs does not set
7. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the appropriate harness connector at the camshaft position actuator solenoid valve. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 5 ohms between the control circuit terminal 1 and ground.
• If 5 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K20 engine control module.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K20 engine control module.
• If less than 5 ohms
3. Ignition ON.
Note: A test lamp must be used for this test. The control circuit is pulled-up to a low current voltage, 1.5-3.5 V on the control circuit is normal.
4. Verify that a test lamp does not illuminate between the control circuit terminal 1 and ground.
• If the test lamp illuminates
1. Ignition OFF, disconnect the harness connector at the K20 engine control module, ignition ON.
2. Test for less than 1 V between the 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 test lamp does not illuminate
5. Remove the test lamp.
6. Connect the DMM black lead to the control circuit terminal 1. Connect the DMM red lead to B+. Set the DMM on the diode setting. Command the CMP actuator solenoid ON and OFF with a scan tool. The DMM should transition from a higher voltage to a lower voltage when commanded ON.
• If the circuit voltage does not correspond to the specified values
1. Ignition OFF, disconnect the harness connector at the K20 engine control module.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance or short to ground in the circuit
• If less than 2 ohms, replace the K20 engine control module.
• If the circuit voltage corresponds to the specified values
7. Test or replace the appropriate camshaft position actuator solenoid valve.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate Q6 camshaft position actuator solenoid valve.
2. Test for 5-12 ohms between the control terminal 1 and the low reference circuit terminal 2.
• If not between 5-12 ohms
Replace the Q6 camshaft position actuator solenoid valve.
• If between 5-12 ohms
3. Test for infinite resistance between each terminal and the Q6 camshaft position actuator solenoid valve housing.
• If less than infinite resistance
Replace the Q6 camshaft position actuator solenoid valve.
• If infinite resistance
4. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake Service and Repair
* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust Service and Repair
* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake Service and Repair
* Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust Service and Repair
* Control Module References Control Module References for Engine Control Module replacement, setup, and programming