Thunderbird V8-281 4.6L SOHC (1994)
Powertrain Control Module: Customer Interest
PCM - MIL ON/Multiple DTC's Set
Article No.
97-17-7
08/18/97
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MALFUNCTION INDICATOR LAMP (MIL) - MIL LAMP
ILLUMINATED - O/D LIGHT FLASHING - ON VEHICLES BUILT
THROUGH 5/16/94
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MALFUNCTION INDICATOR LAMP (MIL) - MIL LAMP
ILLUMINATED - O/D LIGHT FLASHING - ON
VEHICLES BUILT THROUGH 5/16/94 WITH EEC-V SYSTEM
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LAMP - MALFUNCTION INDICATOR LAMP (MIL)
ILLUMINATED - O/D LIGHT FLASHING - ON VEHICLES BUILT
THROUGH 5/16/94 WITH EEC-V
SYSTEM
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O/D LIGHT FLASHING - ON MUSTANGS WITH A
3.8L ENGINE AND THUNDERBIRDS AND COUGARS
WITH A 4.6L ENGINE BUILT THROUGH 5/16/94
FORD:
1994 MUSTANG, THUNDERBIRD
LINCOLN-MERCURY:
1994 COUGAR
CALIBRATION:
4-15E-R00, 4-15P-R00, 4-16E-R00, 4-16P-R00, 4-18A-R05, 4-18A-R10, 4-18B-R05, 4-18P-R05
WARNING:
THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE. PERFORMING THIS MODIFICATION ON OTHER ENGINE
CALIBRATIONS IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.
This TSB article is being republished in its entirety to include reference to TSB 95-8-3 issue and to add a Caution for 1994 Thunderbird and Cougar.
ISSUE:
A stack up of production tolerances, in combination with sensitivity of EEC-V (OBD II) calibrations, may result in the Malfunction Indicator Lamp
(MIL) illuminating and/or the O/D light flashing. When this occurs, the following Diagnostic Trouble Codes (DTCs) may appear:
ENGINE CODES
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1403 DPFE hoses reversed
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1406 downstream hose off or plugged
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1473,1479,1481 Mustang, continuous fan
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1473,1480,1481 Thunderbird/Cougar, continuous fan
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1505 Idle Air Control (IAC) airflow exceeds specifications
TRANSMISSION CODES
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P1731 1-2 shift concern
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P1732 2-3 shift concern
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P1733 3-4 shift concern
ACTION:
On a customer concern basis, the following procedure is recommended: