emissions problems

2003 DODGE DAKOTA
127,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
BLACKSMITH1070
  • MEMBER
  • 1 POST
i have a 2003 godge dacota 3.9 v6 that failed emissions the code came back as p1494 can you help
Mar 14, 2011 at 8:22 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
CARADIODOC
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 34,308 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.
Mar 14, 2011 at 8:28 PM
Advertisement
Avatar
RASMATAZ
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 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.

Mar 14, 2011 at 8:28 PM