Diagnostic Trouble Code (DTC) Information

Condition 

Fig 1: Detecting Camshaft Flanks On Sensor

Courtesy of VOLVO CARS CORPORATION

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

Diagnostic trouble code (DTC) ECM-341B 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 there is no signal from the camshaft position (CMP) sensor although it appears sporadically. 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 

• The camshaft position (CMP) sensor is in the wrong position
• Damaged camshaft position (CMP) sensor
• Loose connections.
• Incorrectly adjusted camshafts.

Fault symptom[s] 

• The engine is difficult to start.