Captiva

DTC P0341 or P0366

The 4X camshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an output signal circuit. The camshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth rotates past the camshaft position sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with 4 varying width output pulses per camshaft revolution that represent an image of the camshaft reluctor wheel. The frequency of the camshaft position sensor output depends on the velocity of the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses camshaft position sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and for limp-home operation.

P0341 - Near Engine Start, Camshaft Position Fast Event Based Test

P0341 - After Engine Start, Camshaft Position Slow Event Based Test

P0366 - Near Engine Start, Camshaft Position Fast Event Based Test

P0366 - After Engine Start, Camshaft Position Slow Event Based Test

P0341 - Near Engine Start, Camshaft Position Fast Event Based Test

The ECM detects the incorrect number of camshaft position sensor pulses in 2 revolutions of the crankshaft, which is usually within 1 s.

P0341 - After Engine Start, Camshaft Position Slow Event Based Test

The ECM detects the incorrect number of camshaft position sensor pulses in 2,000 revolutions of the crankshaft, which is usually within 4 minutes.

P0366 - Near Engine Start, Camshaft Position Fast Event Based Test

The ECM detects the incorrect number of camshaft position sensor pulses in 2 revolutions of the crankshaft, which is usually within 1 s.

P0366 - After Engine Start, Camshaft Position Slow Event Based Test

The ECM detects the incorrect number of camshaft position sensor pulses in 2,000 revolutions of the crankshaft, which is usually within 4 minutes.

DTC P0341 and P0366 are Type B DTCs.

DTC P0341 and P0366 are Type B DTCs.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. With the ignition OFF, inspect the engine wiring harnesses carrying the camshaft position sensor circuits for the following conditions:

•	Close routing of aftermarket electrical equipment

•	Close to solenoids, motors, and relays

Correct any wire harness routing or component placement conditions, if it is determined to be a possible source of electrical interference.

2. With the ignition ON, engine OFF, use the live plot function on the scan tool. Select the engine speed parameter and the camshaft position sensor parameter. Change the minimum spec to 400 RPM for both parameters. Change the maximum spec to 4,000 RPM for both parameters.
3. Start the engine and observe the scan tool.
4. Quickly accelerate and release the accelerator pedal several times. Do not accelerate past 4,000 RPM. The 2 graphed lines on the live plot display should track together across the screen.
5. 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.

1. Ignition OFF, inspect the camshaft position sensor for correct installation.

⇒	If the sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary.

2. Inspect the engine for the following conditions:

•	The engine oil for debris

•	The camshaft reluctor wheel for damage

•	The timing chain, tensioner, and sprockets for wear or damage

⇒	If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection : LE5 or LE9 and Camshaft Cleaning and Inspection : LE5 or LE9 .

Note: You must perform the Circuit/System Testing before proceeding with Component Testing.

1. Inspect the camshaft position sensor for correct installation. Remove the camshaft position sensor from the engine and inspect the sensor and the O-ring for damage.

⇒	If the sensor is loose, incorrectly installed, or damaged, repair or replace the camshaft position sensor.

2. Connect the camshaft position sensor connector to the camshaft position sensor. Turn ON the ignition, with the engine OFF.
3. Ignition ON, and engine OFF. Observe the Camshaft Position Active Counter parameter on the scan tool. Pass a steel object by the tip of the sensor repeatedly. The Camshaft Position Active Counter parameter should increment.

⇒	If the parameter does not increment, replace the camshaft position sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.