MITSUBISHI
TSB-12-13-005
Manufacturer communications
- Publication date
- 2012-11-13
- Received by NHTSA
- 2020-01-25
- NHTSA record numbers
- 10170690
Manufacturer summary
Original wording in English
Some affected vehicles may display an illuminated MIL with DTC P0420: Warm Up Catalyst Efficiency Below Threshold, recorded in the ECM. An incorrect parameter in the judgment criteria may cause a false MIL (mis-detection of a fault when an abnormal condition is not present). This TSB provides dealers with a procedure to reprogram the ECM with new software to correct the condition.
Reported code forms
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
Mitsubishi
P0420Warm Up Catalyst Efficiency Below Threshold, recorded in the ECMCheck vehicle applicability
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.