PCM - MIL ON/DTC's Set/Stalls/Surge/Exhaust Odors: Overview
Article No.98-17-14
09/01/98
^ MALFUNCTION INDICATOR LAMP (MIL)
ILLUMINATED - DIAGNOSTIC TROUBLE CODES
(DTCS) P0133 AND P0153 STORED IN MEMORY -
VEHICLES BUILT WITH 2.5L ENGINE
^ STALL - VEHICLE STALLS WHEN TRANSMISSION
IS ENGAGED AFTER START-UP AT AMBIENT
TEMPERATURES OF -7 TO 10 DEGREES CELSIUS
(20-50 DEGREES FAHRENHEIT) -
VEHICLES BUILT WITH 2.5L ENGINE
^ LAMP - MALFUNCTION INDICATOR LAMP (MIL)
ILLUMINATED - DIAGNOSTIC TROUBLE CODES
(DTCS) P0133 AND P0153 STORED IN MEMORY -
VEHICLES BUILT WITH 2.5L ENGINE
^ EXHAUST - SULFUR ODOR - VEHICLES BUILT
WITH 2.5L ENGINE AND CD4E TRANSMISSION
^ CD4E - FORWARD SURGE ON ENGAGEMENT
AFTER START-UP - VEHICLES BUILT WITH 2.5L
ENGINE
FORD:
1995-97 CONTOUR
LINCOLN-MERCURY:
1995-97 MYSTIQUE
This TSB article is being republished in its entirety to correct the Powertrain Control Module (PCM) service part numbers.
CALIBRATION
Refer to Recalibration Cross Reference Chart for calibrations.
WARNING
THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE(S). PERFORMING THIS MODIFICATION ON OTHER ENGINE CALIBRATIONS IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.
ISSUE
The vehicle may stall after it has been started at ambient temperatures of -7 to 10°C (20-50°F) and transmission engagement occurs approximately 40 seconds after start-up. In addition, some 1996-97 2.5L CD4E vehicles may experience an objectionable exhaust, sulfur, or rotten egg odor may be noticed during various driving conditions, or a forward surge when engaging the transmission after starting the vehicle. Also, on some 1996-97 2.5L vehicles with either a CD4E or MTX-75 transmission, the Malfunction Indicator Lamp (MIL) may illuminate, and Diagnostic Trouble Codes (DTCs) P0133 and P0153 may be stored in memory. These conditions may be caused by the Electronic Engine Control V (EEC V) calibration, the Powertrain Control Module (PCM), and/or the Heated Exhaust Gas Oxygen (HEGO) sensors.
ACTION
Reprogram the PCM for 1996-97 model year vehicles. For 1995 model year vehicles with sulfur smell concern only, replace the PCM. In addition, for vehicles exhibiting the Sulfur Odor Concern, replace both the HEGO sensors. The new calibration addresses the Sulfur Odor Concern by changing the fueling to reduce the sulfur reaction in the catalyst. For engagement surge concerns, the new calibration modifies air adders to control the rpm to match the desired rpm. In addition, the new calibration protects the MIL from illuminating prematurely. Refer to the Service Procedure for details.
Parts Block
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 97-12-3
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage For MIL And HEGO Sensor Concerns
OPERATION DESCRIPTION TIME
981714A Reprogram Powertrain 0.2 Hr.
Control Module (PCM)
981714B Replace Powertrain Control 0.4 Hr.
Module (PCM)
981714C Replace Both Heated 1.0 Hr.
Exhaust Gas Oxygen
(HEGO) Sensors
DEALER CODING
CONDITION
BASIC PART NO. CODE
12A650 42
OASIS CODES: 403000 503000, 504000, 607000, 607400, 612000, 698298