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P1494 Diagnostic Trouble Code Discussion for September 2012

EVAP Leak Detection Pump Switch Or Mechanical Fault


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Trouble Ticket Help Requests for DTC P1494
Help Request Posted
2001 Dodge Ram 1500 Truck 5.2L Hesitation, MIL Lamp on VIN: 3B7HF13Y91
P1494: EVAP Leak Detection Pump Switch Or Mechanical Malfunction. This one is driving me crazy. After running Mitchell's flow chart for "shorted to voltage codes" and preforming some tests that aren't in the book, everything pointed to a bad PCM. New PCM - No fix. Tried different O2 sensors - No fix. PCM data reads 4...
September 14, 2012
2001 Dodge Ram 1500 Truck 5.2L Hesitation, MIL Lamp on VIN: 3B7HF13Y91
P1494: EVAP Leak Detection Pump Switch Or Mechanical Malfunction. This one is driving me crazy. After running Mitchell's flow chart for "shorted to voltage codes" and preforming some tests that aren't in the book, everything pointed to a bad PCM. New PCM - No fix. Tried different O2 sensors - No fix. PCM data reads 4...
September 14, 2012