Engine Controls - MIL ON/DTC P0420 Set
No.: TSB-11-13-010DATE: December, 2011
MODEL: See below
SUBJECT:
ECM REPROGRAMMING FOR DTC P0420 - WARM UP CATALYST EFFICIENCY BELOW THRESHOLD
PURPOSE
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 mis-detection of a fault without there being an abnormal condition.
This TSB provides dealers with a procedure to reprogram the ECM with new software to correct the condition.
IMPORTANT:
If an affected vehicle has a Malfunction Indicator Lamp (MIL) illuminated, and DTCs other than those described in this TSB are stored in the ECM, diagnose and repair those DTCs per the service manual before reprogramming. DO NOT reprogram the ECM until the reason for any other DTCs being set is corrected.
AFFECTED VEHICLES
2008-2010 Lancer equipped with 2.01 non-turbo engine certified to U.S Federal and Canadian Federal emissions standards.
REQUIRED OPERATIONS
OVERVIEW
1. Confirm MUT-III software contains the latest reprogramming database.
2. Reprogram the ECM with new software per the Reprogramming Procedure.
3. Perform "Erase and Read All DTCs."
4. Perform a test drive to confirm DTCs do not return.
5. Correct any fault found during diagnosis.
REPROGRAMMING EQUIPMENT
The following equipment is needed to reprogram the ECM.
^ MEDIC laptop computer with A/C power adaptor - 520924, or MIT547708.
^ VCI (Vehicle Communication Interface) - MB991824.
^ MUT-III main harness 'A' (blue DLC connector) - MB991910.
^ USB 2.0 cable - MB991827.
^ "Engine Compartment/Control Module" label - p/n M55F024G00.
^ Reprogramming Database N11121 or higher
^ MEDIC 3 update at 096 or higher.
^ Standalone MUT-III laptop with Reprogramming CD 2/11 installed.
ECM REPROGRAMMING CHART
REPAIR PROCEDURE
REPROGRAMMING PROCEDURE
PARTS INFORMATION
WARRANTY INFORMATION