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.
LDP failure due to carbon from vapor canister on Dodge Ram Van 2500
Average mileage: 168,000 (149,000–187,000)
11 people reported this problem
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havent fixed yet, do to cost im gonna try to clean it up & get working with wd-40. cant locate the part at any auto parts stores. must be dealership only and i wouldnt buy shit from thoes overpriced fools. it seems suspicious to me that the day after i had dealership do the free ignition recall repair ??? that my check engine light came on with this problem code, thats why i vary seldom let anyone work on my stuff!!! dealerships are just as SHADDY as LAWYERS & COPS !!!
Carbon deposit in carborator. cleaned and replaced