Grand Caravan FWD V6-3.3L VIN 3 Flex Fuel (2002)
Engine Control Module: All Technical Service Bulletins
Emissions - MIL ON/Erroneous DTC P0456 (EVAP)
NUMBER: 18-028-03
GROUP: Vehicle Performance
DATE: July 25, 2003
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-010-02, DATED APR. 22, 2002, WHICH SHOULD BE REMOVED
FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDES ADDITION OF THE A MODEL YEAR,
EXPANDED NOTES, ADDITIONAL PARTS, ADDITIONAL REQUIRED EQUIPMENT AND A UPDATED REPAIR PROCEDURE STEP.
SUBJECT:
MIL Illumination, Erroneous DTC P0456 - Evap Leak Monitor 0.020 Leak Detected
OVERVIEW:
This bulletin involves diagnosing an erroneous Evap Leak Monitor (DTC) P0456 and replacing the Powertrain Control Module (PCM) if necessary.
MODELS:
2001 - **2003** (RS) Town & Country/Caravan/Voyager (Domestic Markets)
NOTE:
This bulletin applies to 2001 and 2002 vehicles equipped with a 2.4L, 3.3L and 3.8L engine (sales code EDZ, EGA, EGH or EGM), **and 2003
vehicles equipped with 3.3L and 3.8L engine (sales codes EGA, EGH or EGM).**
SYMPTOM/CONDITION:
Vehicle with properly functioning evaporative emissions system repeatedly sets DTC P0456 when customer regularly commutes on a steep grade
(downgrades in excess of 10%).
DIAGNOSIS:
If DTC's other than P0456 are present record them on a repair order and repair as necessary before proceeding with this bulletin. Verify that the
evaporative emissions system is functioning as designed, i.e. no leaks can be detected using the Evaporative Emissions Leak Detector (EELD), Miller
Special Tool # 8404. If leaks are detected they must be repaired and it will not be necessary to perform this bulletin. If no leaks are detected and the
owner regularly commutes on a steep grade and DTC P0456 repeatedly sets, perform the Repair Procedure.
WARNING:
This service only PCM's should only be installed to fix this exact condition. This PCM should not be installed for any other purpose.
PARTS REQUIRED:
