DTC P0010, P0013, or P2088-P2091. Buick Regal 2009

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2009 🢒 Regal 🢒 DTC 🢒 DTC P0010, P0013, or P2088-P2091

DTC P0010, P0013, or P2088-P2091 LTD without Turbocharger

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0010: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit

DTC P0013: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Intake CMP Actuator Solenoid Control	P0010	P0010	P0010	P0011
Intake CMP Actuator Low Reference	--	P0010	--	--
Exhaust CMP Actuator Solenoid Control	P0013	P0013	P0013	P0014
Exhaust CMP Actuator Low Reference	--	P0013	--	--

The camshaft position (CMP) actuator is attached to each camshaft and is hydraulically operated in order to change the angle of the camshaft relative to crankshaft position (CKP). The CMP actuator solenoid is controlled by the control module. The control module sends a pulse width modulated 12V signal to a CMP actuator solenoid. The solenoid controls the amount of engine oil flow to a CMP actuator. The CMP actuator can change the camshaft angle a maximum of 25 degrees. The control module increases the pulse width to accomplish the desired camshaft operation.

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

The ECM detects an open, short to ground, or a short to voltage on the high control circuit or an open on the low reference circuit for more than 0.25 second.

Action Taken When the DTC Sets

DTCs P0010 and P0013 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0010 and P0013 are Type B DTCs.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ensure the vehicle has the proper oil viscosity.
Observe the engine oil level. The engine oil level should be within the operating range.
Allow the engine to reach operating temperature.
Increase the engine speed to 1,500 RPM.
Command each CMP actuator to 25 percent. The CMP actuator angle desired parameter should match the CMP actuator actual parameter.
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.

Circuit/System Testing

Ignition OFF, disconnect the harness connector at the Q6 CMP actuator solenoid.
Test for less than 5Ω between the low reference circuit terminal B and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance.

Verify that a test lamp does not illuminate between the low reference circuit terminal B and the control circuit terminal A.

⇒	If the test lamp illuminates, test the control circuit for short to voltage. If the circuit tests normal, replace the K20 ECM.

Remove the test lamp.
Command the CMP Actuator Sol. ON with a scan tool. Verify the scan tool CMP actuator solenoid status is OK.

⇒	If not the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.

Install a 3A fused jumper wire between the control circuit terminal A and the low reference circuit terminal B. Command the CMP Actuator Sol. ON with a scan tool. Verify the scan tool CMP actuator solenoid status is Fault.

⇒	If not the specified value, test the control circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

Determine that the vehicle has the correct engine oil. Refer to Service and Appearance Care in the owner's manual.

⇒	If the engine oil life system monitor displays the Change Oil Soon message, the engine oil is more than one year old, contains additives, or is not the correct viscosity, change the oil.

Test the engine oil pressure. Refer to Oil Pressure Diagnosis and Testing.

⇒	If the oil pressure is low, correct the low pressure first.

Inspect each CMP actuator solenoid valve assembly for the following:

•	Torn screens

•	Debris on the screens

•	Debris clogging the oil ports

•	Missing screens

•	Oil seepage at the solenoid connector pins

Inspect for the following conditions:

•	Excessive timing chain play

•	Proper installation of the CMP actuator assembly

If all circuits test normal, test or replace the Q6 CMP actuator solenoid.

Component Testing

Measure the resistance of each CMP actuator solenoid valve assembly. Resistance should be between 8-12Ω.
Connect a jumper wire between the CMP actuator low reference circuit at the solenoid and a good ground. Connect a fused jumper wire to the CMP actuator high control circuit at the solenoid. Momentarily touch the fused jumper to B+. Observe the spool valve inside the CMP actuator. The spool valve should move from fully closed to fully opened position.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Camshaft Position Actuator Solenoid Valve Replacement - Exhaust

•	Camshaft Position Actuator Solenoid Valve Replacement - Intake

•	Control Module References for replacement, setup, and programming

DTC P0010, P0013, or P2088-P2091 LDK with Turbocharger

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0010: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit

DTC P0013: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit

DTC P2088: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage

DTC P2089: Intake Camshaft Position (CMP) Actuator Solenoid Control Circuit High Voltage

DTC P2090: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit Low Voltage

DTC P2091: Exhaust Camshaft Position (CMP) Actuator Solenoid Control Circuit High Voltage

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Intake CMP Actuator Solenoid Control	P0010, P2088	P0010	P0010, P2089	P0011
Intake CMP Actuator Ignition 1 Voltage	--	P0010	--	--
Exhaust CMP Actuator Solenoid Control	P0013	P0013	P0013	P0014
Exhaust CMP Actuator Ignition 1 Voltage	--	P0013	--	--

Circuit/System Description

The camshaft position (CMP) actuator system enables the engine control module (ECM) to change the timing of the camshafts while the engine is operating. The CMP actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the CMP actuator solenoid duty cycle by controlling the amount of solenoid ON time. The CMP actuator solenoid controls the advance or the retard of each camshaft. The CMP actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.

Ignition voltage is supplied directly to the CMP actuator solenoid. The ECM controls the solenoid by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Camshaft Actuator System Description