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What part do I need to replace if my 1999 Jeep Grand Cherokee reads code P1494?

Vehicle: Jeep,1999,Grand Cherokee,4.0 6 Cylinder

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P1494 Leak detection pump SW or mechanical fault

On the LDP pump there is a vacuum hose that connects to it , majority of the code P1494 is a result of the vacuum hose getting disconnected or rupturing

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