F 250 4WD LD Pickup V8-5.4L SOHC VIN L (1997)
Oxygen Sensor: Customer Interest
MIL ON/Trouble Codes Stored/Driveability Symptoms
Article No.
00-1-7
01/10/00
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DETONATION - MIL ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P0133, P0171 AND/OR P1131 STORED IN MEMORY -
VEHICLES WITH 5.4L ENGINE BUILT BEFORE 11/1/1997
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HESITATION/STUMBLE - MIL ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P0133, P0171 AND/OR P1131 STORED IN
MEMORY - VEHICLES WITH 5.4L ENGINE BUILT BEFORE 11/1/1997
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MALFUNCTION INDICATOR LAMP (MIL) - MIL ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P0133, P0171 AND/OR
P1131 STORED IN MEMORY-VEHICLES WITH 5.4L ENGINE BUILT BEFORE 11/1/1997
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ROUGH IDLE - MIL ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P0133, P0171 AND/OR P1131 STORED IN MEMORY -
VEHICLES WITH 5.4L ENGINE BUILT BEFORE 11/1/1997
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STALL/NEAR STALL - AT IDLE AND/OR LOW SPEEDS - MIL ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P0133, P0171
AND/OR P1131 STORED IN MEMORY - VEHICLES WITH 5.4L ENGINE BUILT BEFORE 11/1/1997
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LAMP - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - DIAGNOSTIC TROUBLE CODES (DTCS) P0133, P0171 AND/OR
P1131 STORED IN MEMORY - VEHICLES WITH 5.4L ENGINE BUILT BEFORE 11/1/1997
FORD:
1997-1998 EXPEDITION, F-150, F-250 LD
LINCOLN:
1998 NAVIGATOR
This TSB article is being republished in its entirety to update the Service Procedure.
ISSUE
The Malfunction Indicator Lamp (MIL) may illuminate and Diagnostic Trouble Codes (DTCs) P0133, P0171 and/or P1131 may be stored in memory.
Additionally, there may be one or more of
the following driveability symptoms:
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Hesitation
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Stumble
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Surge
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Miss
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Rough idle
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Near stall or stall at idle
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Detonation on acceleration
This may be caused by cold condensate from the A/C system dripping onto the Heated Exhaust Gas Oxygen (HEGO) sensor causing thermocycling of
the HEGO sensor
ACTION
Divert water from dripping onto the sensor by installing a fabricated drain tube to the end of the A/C drain. This should reroute the water and reduce the
possibility of the above conditions occurring. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
