Volt

DTC P0341 or P0366

Each camshaft is equipped with a camshaft position sensor that the engine control module (ECM) monitors. The camshaft position sensor is a hall effect switch that works in conjunction with a 4X reluctor wheel. The reluctor wheels are mounted to the camshaft position actuators that are mounted to the end of the camshafts. The ECM uses the camshaft position sensor signals in order to determine the position of the camshafts. The ECM supplies 5 V to the camshaft position sensors on the 5 V reference circuits and supplies a ground on the low reference circuits. The camshaft position sensors provide a signal to the ECM on the signal circuits.

Condition 1

Condition 2

Condition 1

The ECM detects a signal from the camshaft position sensor, but the number of pulses are less than 4 or greater than 6 of what is expected for one crankshaft revolution.

Condition 2

The number of camshaft pulses received during 100 engine cycles is less than 398 or greater than 402.

DTCs P0341 and P0366 are Type B DTCs.

DTCs P0341 and P0366 are Type B DTCs.

A high resistance condition on the camshaft position sensor circuits may cause a DTC to set.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Hybrid Modes of Operation Description

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle in Service Mode, observe the DTC information with a scan tool. DTC P0641 should not be set.

⇒	If DTC P0641 is set, refer to DTC P0641, P0651, P0697, or P06A3 : ECM .

2. Engine running, observe the scan tool Inlet or Exhaust Camshaft Position Active Counter parameter. The parameters should be incrementing.
3. Observe the DTC information with a scan tool. DTC P0341 or P0366 should not set.
4. 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.

1. Vehicle OFF, inspect the appropriate B23 camshaft position sensor for the correct installation.

⇒	If the B23 camshaft position sensor is loose, inspect the sensor and the O-ring for damage, and replace as necessary.

2. Disconnect the harness connector at the appropriate B23 camshaft position sensor.
3. Vehicle OFF, all systems OFF. It may take 2 minutes for all vehicle systems to power down. Test for less than 5 Ω between the low reference circuit terminal 2 and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.

4. Vehicle in Service Mode, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.

⇒	If less than the specified range, test the 5 V reference 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 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

5. Test for 4.8-5.2 V between the signal circuit terminal 3 and ground.

⇒	If less than the specified range, test the signal 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 signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.

6. Vehicle OFF, connect a 3 A fused jumper wire to the signal circuit terminal 3.
7. Vehicle in Service Mode, momentarily touch the end of the fused jumper wire to ground while monitoring the scan tool parameters listed below. The parameters should increment.

•	Inlet Camshaft Position Active Counter

•	Exhaust Camshaft Position Active Counter

•	If the parameters do not increment, replace the K20 ECM.

8. Inspect the engine for the following conditions:

•	Physical damage to the B23 camshaft position sensor or the reluctor wheel

•	Excessive play or looseness of the B23 camshaft position sensor or the reluctor wheel

•	Excessive camshaft end play

•	Improper installation of the B23 camshaft position sensor or the reluctor wheel

•	Foreign material passing between the B23 camshaft position sensor and the reluctor wheel

•	The timing chain and tensioner for wear or damage

⇒	If any of the above conditions exists, repair as necessary.

9. If all circuits test normal, replace the B23 camshaft position sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.