Diagnostic trouble code (DTC) information ECM-921F

Condition 

Fig 1: Identifying Clutch Pedal Push Rod & Position Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Engine control module (ECM) calculates, using engine rpm and vehicle speed, which gear in the transmission is used at the moment. If the Engine control module (ECM), during one operating cycle, detects that more than 5 shifts have occurred at the same time as the clutch pedal, during the same operating cycle, has moved less than 10%, the diagnostic trouble code (DTC) is stored.

For more information about the electronic throttle system and related components such as the electronic throttle module, accelerator pedal position sensor, brake light switch, clutch pedal position sensor, and brake pedal position sensor:Design

See Function

Substitute Value 

None.

Possible Source 

Faulty signal: 

• defective clutch pedal sensor.

Fault symptom[s] 

• the malfunction indicator lamp (MIL) lights.