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Trouble code 1494 1495 1999 t&c 3.8 - Town and Country Chrysler Cars & Trucks

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P1494
The code refers to the leak detection pump that is part of the gasoline vapor control system which is for pollution minimization. It says either that the pump switch or mechanical operation is faulty. According to a Chrysler manual I have, you would find the pump, probably on the underside of the vehicle by tracing the hoses related to the vapor recovery tank that may be in the right front corner of the engine compartment (I don't know Jeep designs) and then check to see if the pump starts when you turn the ignition to the run position when the vehicle is cold. Then remove the vacuum hose side of the pump and see if it draws a vacuum. If it does, then the vacuum-detecting switch that detects that the pump operation is OK may be faulty. If the pump doesn't start or doesn't draw a vacuum then the power to the pump, the pump itself, or the vacuum line may be leaky. Finally, the powertrain controller could be at fault.
In any case, that is where the issue is, and it should not be a major issue if it is handled by a knowledgeable mechanic. But you could check it over yourself if you are so inclined.
P1495
LEAK DETECTION PUMP DEFECTIVE/INOP
THE ROOT CAUSE HERE IS A DEFECTIVE EVAPORATIVE EMISSIONS LEAK DETECTION PUMP, IT PULLS A VACUUM ON THE GAS TANK TO CHECK FOR FUEL LEAKS. REPLACE IT.

Posted on Jul 24, 2009

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