From my shop manual (also applies to your L94):
DTC P0011
Camshaft Position CMP) System Performance
Circuit/System Description
The camshaft position (CMP) actuator solenoid is controlled by the engine control module (ECM). The ECM
sends a 12 volt, pulse width modulated (PWM) signal to the CMP actuator solenoid. The CMP actuator
solenoid positions the CMP actuator spool valve to control the amount of pressurized engine oil, which enters
into the CMP actuator assembly. A low reference wire circuit between the CMP actuator solenoid and the ECM
completes the electrical circuit. The frequency of the pulse width modulated signal is fixed at 150 Hz. The ECM
can only command the CMP actuator to retard the valve timing from the camshaft park position, or advance the
valve timing back to the park position. The total range of valve timing command is 31 degrees as measured at
the camshaft, or 62 degrees as measured at the crankshaft.
CONDITIONS FOR RUNNING THE DTC
DTC P0010, P0016, P0335, P0336, P0340, or P0341 is not set.
The engine is running.
The system voltage is between 9 and 18 volts.
The CMP actuator is enabled.
The rate of change in the camshaft position is less than, 7.5 degrees for 3.35 seconds.
CONDITIONS FOR SETTING THE DTC
The ECM detects resistance greater than 2 ohms on the low reference circuit.
The ECM detects that the CMP Angle position is more than 8 degrees difference than the Desired CMP position.
ACTION TAKEN WHEN THE DTC SETS
DTC P0011 is a Type B DTC.
The CMP actuator is commanded to the park position.
CIRCUIT/SYSTEM VERIFICATION
1. Observe the engine oil level. The engine oil level should be within the operating range on the oil indicator
stick.
2. Start the engine; allow the engine to reach normal operating temperature.
3. Monitor the engine oil pressure parameter value with the scan tool. The engine oil pressure must be at or
above the minimum hot oil pressure values. Refer to Engine Mechanical Specifications (RPO LY5 VIN
J) or Engine Mechanical Specifications (RPO LC9 VIN 3) or Engine Mechanical Specifications
(RPO LY2 VIN C) or Engine Mechanical Specifications (RPO LH6 VIN M) or Engine Mechanical
Specifications (RPO LMG VIN 0) or Engine Mechanical Specifications (RPO LY6 VIN K) or
Engine Mechanical Specifications (RPO L76 VIN Y) or Engine Mechanical Specifications (RPO
L92 VIN 8) .
4. Using the output control function of the scan tool, command the CMP actuator solenoid to 25 degrees.
The CMP Desired parameter value should match the CMP Angle parameter value.
5. Observe the CMP Variance value, on the scan tool. The CMP Variance value will increment for several
seconds, until the CMP Angle value matches the Desired CMP value. The CMP Variance value should
then return to zero degrees.
6. 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 Fame/Failure Records
Data List.
CIRCUIT/SYSTEM TESTING
1. Ignition OFF, disconnect C112.
2. Test for less than 1 ohm between the low reference circuit ECM side, terminal E and ground.
If greater than 1 ohm, test the low reference circuit for an open/high resistance. If the circuit tests
normal, replace the ECM.
3. Remove the water pump from the engine. Refer to Water Pump Removal (RPO
LY2/LH6/LMG/LY5/LC9) or Water Pump Removal (RPO LY6/L76/L92) .
4. Inspect and test the remaining wire harness from C112 to the CMP solenoid for an open/high resistance,
or a short to ground.
If the circuit tests normal, perform the component testing for the CMP actuator solenoid.
If the CMP solenoid and the circuit test normal, then refer to Camshaft Position Actuator Magnet
Cleaning and Inspection and Camshaft Position Actuator Solenoid Valve Inspection (On-Vehicle) or Camshaft Position Actuator Solenoid Valve Inspection (Off-Vehicle).
COMPONENT TESTING
Static Test
Test for 5.9 and 6.9 ohms at 20°C (68°F) between the solenoid control terminal 2 and the low reference terminal
1 at the CMP actuator solenoid.
If the resistance is not within the specified range, then replace the CMP actuator solenoid. Refer to
Camshaft Position Actuator Magnet Replacement .
Dynamic Test
Point the CMP actuator solenoid vertically, towards a shop towel. Connect one end of a fused jumper wire to
the CMP actuator solenoid control circuit terminal 2 and 12 volts. Connect a second jumper wire to the low
reference circuit terminal 1 and momentarily connect to ground. The CMP actuator solenoid should
immediately extend.
If the CMP actuator solenoid pintle does not extend, then replace the CMP actuator solenoid. Refer to
Camshaft Position Actuator Magnet Replacement .
REPAIR PROCEDURES
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Camshaft Position Actuator Magnet Replacement
Control Module References for ECM replacement, setup, and programming
DTC P0016
helpppp! Please!
