Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-220F

Condition





Note! This diagnostic trouble code (DTC) is only used for development purposes and is not to be fault-traced. This diagnostic trouble code (DTC) can be ignored and erased with no additional remedial action.

The engine control module (ECM) compares the front and rear heated oxygen sensor (HO2S) adaptation values. In order to check front oxygen sensor regulation, check the engine control module (ECM) output signals from the rear oxygen sensor. If the control system for the heated oxygen sensors is working correctly, the control signals from the rear oxygen sensor must be within a predefined statistical interval.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The measured signals from the rear oxygen sensor (bank 1) is over or under the permissible range for a long period of time.
The diagnostic trouble code can be generated after 35 minutes of normal driving (not with heavy load).
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Engine running.

Note! This diagnostic trouble code (DTC) is primarily used for development purposes and has little or no information value during fault-tracing.

Substitute value
- None.

Possible source
- Leakage in the exhaust system.
- Contact resistance in the terminals.
- Damaged cable harness.
- Damaged heated oxygen sensor (HO2S).

Fault symptom[s]
- None