DRIVEABILITY - STREAMLINED DIAGNOSTIC PROCEDURE FOR VEHICLES WITH MIL ON AND DTCS P0401, P0402, P1400 OR P1401 - ADDITIONAL SYMPTOMS MAY INCLUDE RUNS ROUGH, LACKS POWER, SURGE, POOR FUEL ECONOMY
Publication Date: May 25, 2004
2000-2002 TAURUS 2001-2002 CROWN VICTORIA, FOCUS, MUSTANG 2001 EXPLORER USPS 2001-2002 E-SERIES, ESCAPE, EXPEDITION, EXPLORER SPORT TRAC, EXPLORER SPORT, F-150, RANGER, WINDSTAR 2002-2003 EXPLORER
2001-2002 TOWN CAR
2000-2002 SABLE 2001-2002 COUGAR, GRAND MARQUIS 2002-2003 MOUNTAINEER
This article supersedes TSB 04-3-1 to update service part information and applications.
Some vehicles may exhibit a malfunction indicator lamp (MIL) "ON" with or without the following symptoms: Rough Running, Lack of Power, Surge or Poor Fuel Economy, along with diagnostic trouble codes (DTC's) P0401, P0402, P1400 or P1401. This may be caused by an intermittently functioning tube-mounted delta pressure feedback EGR (DPFE) sensor (Figure 1).
For vehicles equipped with a tube-mounted DPFE sensor, perform the following diagnostic procedure and repair action. This procedure supersedes the diagnostic procedure in the PC/ED Manual for the issue described above.
ALL LISTED APPLICATIONS CAN NOW BE SERVICED WITH DPFE SENSOR 4U7Z-9J460-AA
Figure 1 - Article 04-11-1
THIS ARTICLE APPLIES TO THE FULL MODEL YEAR FOR ALL VEHICLES LISTED EXCEPT THE FOLLOWING:
2002 Taurus/Sable 3.0L DOHC - Built After May 2002
2002 Taurus/Sable 3.0L OHV - Built After February 2002
2002 Econoline And F-150 4.2L OHV - Built After April 9, 2002
2003 Explorer 4dr/Mountaineer 4.6L SOHC - Built After February 2, 2003
Retrieve continuous DTC(s).
If P0401, P0402, P1400 or P1401 are present, turn ignition OFF and replace the DPFE sensor.
Clear continuous DTC(s).
Perform key on engine off (KOEO) and key on engine running (KOER) self-test.