Diagnostic Trouble Code (DTC) Information

ECM-7120 ENGINE CONTROL MODULE (ECM), INTERNAL FAULT
DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION




Condition
After a short delay after ignition has been switched on, a check is performed to check if the heated oxygen sensor (HO2S) guide circuit in the control module is active. Diagnostic trouble code (DTC) ECM-7120 is stored if the control signal in the control module does not vary.

Condition
Fuel trim is disabled after three restart attempts by the sensor guide circuit.

Possible source

Faulty signal:
- defective sensor guide sensor.

Condition
None.