Diagnostic Trouble Code (DTC) Information

Condition

Courtesy of VOLVO CARS CORPORATION

The Engine control module (ECM) continuously monitors a number of internal signals through calculations and compares them. The aim is to ensure reliability during operation.

The diagnostic trouble code is generated if the control module detects:

Internal fault in the engine control module (ECM).

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

Ignition on.

NOTE:

The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Substitute Value

Various internal signals in the engine control module (ECM) are replaced with default values.

Possible Source

Poorly charged battery or corroded connecting wiring.
Damaged software in the engine control module (ECM).
Damaged engine control module (ECM).

Fault symptom[s]

DL, Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication