How to test and replace a leak detection pump (LDP) on a Ram 1500 p0456 p0440
Channel: TR Rehab
Date: 2020-09-29

This video shows how to test a leak detection pump (LDP) on a 2003 Ram 1500 and confirm if it is functioning properly and sealing during EVAP emission system tests. The trouble code p0456 is a small leak in the EVAP system. Other common causes of p0456 and sometimes p0440 are 1. A faulty gas cap, 2. Fuel vapor leak detection pump hose, 3. Vapor canister purge valve solenoid or the Charcoal fuel vapor canister. The leak detection pump (LDP) test is being performed on a 2003 Ram 1500 5.7L. This same test can be performed on the Dodge, Jeep and Chrysler vehicles listed below.

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Replacement part: Dorman 310-500 Leak Detection Pump 

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Leak Detection Pump To Canister Crankcase Breather Hose - Compatible with 2002-2005 Dodge Ram 1500

2003 Dodge Ram 1500
2003 Dodge Grand Caravan
2003 Dodge Caravan
2003 Dodge Durango
2003 Dodge Neon
2003 - 2004 Dodge Dakota
2003 - 2005 Dodge Ram 2500
2003 - 2005 Dodge Ram 3500
2005 - 2006 Dodge Magnum
2006 Dodge Charger

2004 - 2006 Jeep Liberty
2005 - 2006 Jeep TJ
2005 - 2006 Jeep Wrangler

2003 Chrysler Voyager
2003 - 2009 Chrysler PT Cruiser
2004 - 2006 Chrysler Pacifica
2004 - 2007 Chrysler Town & Country
2005 - 2006 Chrysler 300