CAT Monitor/O2 Sensor - MIL ON/Codes Stored In Memory: Overview

Article No.
98-12-4

06/22/98

^ MALFUNCTION INDICATOR LAMP (MIL) - MIL
ILLUMINATED WITH DIAGNOSTIC TROUBLE
CODES (DTCS) P0136, PO138 AND/OR PO141
STORED IN MEMORY - 2.5L VEHICLES EQUIPPED
WITH CD4E TRANSAXLE

^ LAMP - MALFUNCTION INDICATOR LAMP (MIL)
ILLUMINATED WITH DIAGNOSTIC TROUBLE
CODES (DTCS) P0136, PO138 AND/OR PO141
STORED IN MEMORY - 2.5L VEHICLES EQUIPPED
WITH CD4E TRANSAXLE

FORD:
1996-98 CONTOUR

LINCOLN-MERCURY:
1996-98 MYSTIQUE

ISSUE

The Malfunction Indicator Lamp (MIL) may illuminate and Diagnostic Trouble Codes (DTCs) P0136, P0138 and/or P0141 may be stored in memory. This may be caused by the rear Catalyst Monitor Sensor (CMS) wiring coming into contact with the link shaft. Over an extended period of time this continuous contact can lead to chafing on the wire Insulation resulting in damage to the sensor wires.

ACTION

Replace the CMS sensor and re-route the wiring away from any possible contact with the link shaft. The sensor wiring is routed such that it is not possible for the lead to come into contact with the link shaft. Refer to the following Service Procedure for details.

PART NUMBER PART NAME

F6CZ-9G444-BA Cataylst Monitor Sensor (CMS)
W700465-S305 Clip/Bracket
W7OO219-S300 Clip/connector

OTHER APPLICABLE ARTICLES: NONE

WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage

OPERATION DESCRIPTION TIME

981204A Replace Catalyst Monitor 0.4 Hr.
Sensor (CMS) And
Re-route Wire Harness

DEALER CODING
CONDITION
BASIC PART NO. CODE
9G444 43

OASIS CODES: 206000, 698298