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I have a 2002 Grand Cherokee with a P1494 code. Is this serious requiring immediate attention?

1 Answer

Jeffrey Turcotte

Jeep Master 8,991 Answers
Posted on Apr 13, 2011

Jeffrey Turcotte

Jeep Master

Joined: Aug 22, 2010

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Hi, you can drive the car with this code, and there is no safety or drivability issue. The Jeep uses a pump to test the fuel vapor emission control system, and your pump is acting up. So the computer will not be able to test your system for vapor leaks.
Please let me know if you would like troubleshooting procedures to determine the exact problem, and thanks for using FixYa.

Trouble Code: P1494 EVAP Leak Detection Pump Switch Or Mechanical Fault
Possible Causes:

LDP switch signal circuit is open or shorted to ground LDP switch power circuit is open (test power to Fused Ignition) LDP vacuum hose is clogged, loose or restricted LDP assembly is damaged or has failed (the switch has failed)

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Check the answer in other post mine: Grand Cherokee Jeep code P1494

Hope helps (remember to rate this).

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danbalue, a code P1765 means Transmission 12V Supply Relay Control Conditions and P1494 means EVAP LDP Pressure Switch Fault Conditions.

I found info on the following codes:
P0443 - http://www.obd-codes.com/p0443
P1494 - http://www.check-engine-light.com/dodge

Good luck.

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The LDP, (leak detection pump) is located in the left/front corner of engine compartment below the air cleaner housing. It is mounted to left/front inner fender sheet metal. The LDP and LDP filter are replaced (serviced) as one unit.

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