Close
Dodge Ram 1500 Problems

Check Engine Light Due to Pinched Leak Detection Pump Vacuum Lines on Dodge Ram 1500

Problem Description and Possible Solution

If a Check Engine Light illuminates indicating leak detection pump (LDP) failure, the cause is often pinched or disconnected vacuum lines to the pump. Vacuum lines should be inspected before replacing the leak detection pump. Contamination (carbon or debris) in the pump can cause failure and any hoses should be cleared before a new pump is installed.

(40 people reported this problem)

Dodge Ram 1500 Vehicles With This Problem

RepairPal Verified
Average mileage: 117,313 (25,000–200,000)
Exhaust & Emissions affected: Gasoline
14 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Not Your Dodge Ram 1500 Problem?
Brake problem? Or maybe a faulty head gasket cylinder?
Learn About Your Car Problems
Search For a Specific Car Problem
Viewing 1-10 of 10 comments
Check engine light came on with code P0456 (Emission leak- EVAP system small leak). Gas cap is tight. I have not had a chance to inspect vacuum system.
engine light on but runs fine heard a hissing under the truck and found two air lines cracked and part of the line missing when I took the lines off the crumbled in my hand much like my dash board I replace the lines and the light went out
Replaced leak detection pump. Chech engine light came backb
On about 1000 miles later,cleared dtc. Hasn't been a problem yet
light has been on since 52000 miles cannot find the problem replaced th module and went off for a while then came back had checked and fuel system still a problem dodge would not fix because had just went out of warranty. feel it is there problem and they should still fix