Question about 2002 Chrysler PT Cruiser
P1494 Leak detection pump pressure switch or mechanical fault
P1495 Leak detection pump solenoid circuit
you have a problem with the fume extraction circuit like a motor or something
Posted on Apr 24, 2011
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Posted on Jan 02, 2017
SOURCE: i have a 1999 mitsubishi
I kept getting this code on my 2001 stratus it had the 3.0. The problem for me was my egr valve. I was able to clean mine with card cleaner and it worked for me. But every six months it came back and had to clean it again. Later found out I had some vacuum leaks which were causing car to run rich as cause more junk to clog egr. After fixing those the problem stopped. Good luck.
Posted on Jun 18, 2011
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During evaporative system diagnosis, Leak Detection Pumps have mistakenly been replaced. A thorough inspection for pinched, kinked, or disconnected supply vacuum lines (as currently listed in the Powertrain Diagnostic Procedures) is a critical step in diagnosing DTC P1494 (LDP SW OR MECHANICAL FAULT). Additionally, the other evaporative leak faults (DTC P0442 - SMALL LEAK, P0455 - LARGE LEAK, and P0456 - VERY SMALL LEAK) should have the supply vacuum lines examined for pinches or kinks prior to any LDP component replacement.
The supply vacuum lines should be checked from the engine compartment all the way to the fuel tank, including the LDP and purge system.
NOTE: VERIFY ALL RELATED SUPPLY VACUUM LINE ROUTINGS FOR PINCHES, KINKS, OR DISCONNECTION'S BEFORE REPLACING LDP SYSTEM COMPONENTS.
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