Ram Wagon B150

LDP failure due to carbon from vapor canister on Dodge Ram Wagon B150

Problem Description and Possible Solution

Leak detection pump failure can be caused by the internal diaphragm switch sticking, or in some cases, contamination from debris or carbon particles from vapor canister. If black carbon particles are present in the LDP, replace vapor canister in addition to LDP. The purge solenoid should also be checked for debris or carbon contamination and replaced as necessary. All evap system hoses are subject to cracking and splitting causing leaks, Inspect hoses carefully. In cases of contamination from carbon particles or debris, all hoses and tubes must be blown out with compressed air to remove contaminates.

Problem Data
RepairPal Verified
Average mileage: (–)
1 model year affected: 1994
1 person reported this problem