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Emissions problems

Tiny
BLACKSMITH1070
  • MEMBER
  • 2003 DODGE DAKOTA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 127,000 MILES
I have a 2003 godge dacota 3.9 v6 that failed emissions the code came back as p1494 can you help
Monday, March 14th, 2011 AT 8:22 PM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
"Leak Detection Pump Switch or Mechanical Fault". That's the pump that puts the fuel supply system into two pounds of pressure, then it watches to see how fast that pressure leaks down. Not sure which switch the code is referring to but the Check Engine light should be on too unless this was an intermittent problem that has stopped acting up.
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Monday, March 14th, 2011 AT 8:28 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P1494 Leak Detection Pump Switch or Mechanical Fault. Incorrect input state detected for the Leak Detection Pump (LDP) pressure switch.

The Evaporative LDP switch may be bad or the pump itself has a problem. Check the pump, the wire connections, and the hoses attached to it.
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Monday, March 14th, 2011 AT 8:28 PM

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