Question

What is code the engine code p1494 on my 1999 Dodge Dakota?

Answer 1

This code is normally caused by a failure in the LDP (leak detection pump) The system should be smoke checked as well as the wiring to the pump checked to be sure the LDP is actually working. MOPAR uses the LDC to produce vacuum in the evap control system to see if there is a leak.

Answer 2

P1494 DODGE - EVAP Leak Detection Pump Pressure Switch Condition
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