Diagnostic Trouble Code (DTC) Information

Condition 

Diagnostic trouble code (DTC) ECM-340D is for the camshaft position (CMP) sensor, intake.

Diagnostic trouble code (DTC) ECM-341D is for the camshaft position (CMP) sensor, exhaust.

The engine control module (ECM) checks the pulse width modulation (PWM) signal from the camshaft position (CMP) sensor.

The diagnostic trouble code (DTC) is stored if the signal from the camshaft position (CMP) sensor is constantly low. This is interpreted by the engine control module (ECM) as a fault. The diagnostic trouble code (DTC) can be diagnosed when the engine is running.

Substitute Value 

• None.

Possible Source 

• Short-circuit to ground in the signal cable
• Open-circuit in the power cable
• Loose connections.

Fault symptom[s] 

• The engine is difficult to start.