2003 Dodge Caravan Code P0456

Tiny
BHAINES08016
  • MEMBER
  • 2003 DODGE CARAVAN
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 52,000 MILES
Can you tell me where to look to find the problem for this code. I have checked the gas cap and it is sealing fine. Could it be hoses that are cracked?
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Saturday, November 15th, 2008 AT 2:19 PM

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Tiny
BMRFIXIT
  • EXPERT
This is what I have on this code

TECHNICAL SERVICE BULLETIN
MIL ILLUMINATION, ERRONEOUS DTC P0456 - EVAP LEAK MONITOR 0.020 LEAK DETECTED
TECHNICAL SERVICE BULLETIN
Reference Number(s): 18-028-03, Date of Issue: July 25, 2003
Related Ref Number(s): 18-028-03
ARTICLE BEGINNING
SUBJECT
GROUP:Vehicle Performance
NOTE: 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.
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

MIL ILLUMINATION, ERRONEOUS DTC P0456 - EVAP LEAK MONITOR 0.020 L.

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
Prior approval is required through the STAR center before ordering parts and completing repair.

Engine Old PCM Part Number New PCM Part Number 3.3L 04727318AA Thru AD 05134542AA "
REPAIR PROCEDURE
1.**Replace the PCM. Refer to the service information available in TechCONNECT or the appropriate service manual in Section 8E, Electronic Control Modules.**
NOTE: The following is required by law.
2. Type the necessary information on the "Authorized Modification Label" p/n 04275086AB and attach near the VECI label.

Reimbursable within the provisions of the warranty.
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Saturday, November 15th, 2008 AT 5:14 PM

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