Question about 2000 Jeep Grand Cherokee

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Somg check problem (code p1494)

Somg check fail do to fault (code p1494) . I need help, find what the code mean.

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The code could be set for a number of reasons such as a faulty gas cap, cracked vacuum lines, solenoids & vent valves stuck to the pump itself. It can be a very difficult fault to cure being it doesn’t take a very big leak anywhere in the system to set the code and that’s if it’s a leak and not an electrical or mechanical fault.

Start with the easiest, look at your fuel cap. Is the gasket good? Buy a new one, clean where it seats well, put it on making sure it clicks at least 3 times, and see if that solves it. If not you will have to start looking at hoses for hairline cracks. And yes, although it's rare, sometimes the canister itself gets a crack and needs to be replaced. It will be a dealer only item of course

Posted on Jun 06, 2010

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2 Answers

Que significa codigo p1494


P1494 Leak detection pump pressure switch or mechanical fault

Jul 01, 2014 | 1999 Jeep Grand Cherokee

1 Answer

Engine light stays on code p1494


P1494 code is a leak detection pump switch or mechanical fault, leak detection pump switch does not respond to input. The leak detection pump (if equipped) is located under the air filter housing on models through 2001. Check if the vapor and vacuum lines are securely connected to the leak detection pump or a diagonstic trouble code my be set like this. The leak detection pump switch may be bad and need replaced.

Sep 27, 2011 | 2000 Jeep Cherokee

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Check engine light is on, and OT sensor code is P1494 was diagnosed.


P1494 - LEAK DETECTION PUMP SWITCH OR MECHANICAL FAULT . There is a service bulletin for certain years pertaining to this problem . Some cars will fill the vacuum line going to the LDP with oil , causing this dtc to trip . In most cases you can clear this and it won't come back-also, check your gas cap, it needs to seal the system, if it is loose or leaks, it can set this code.

Jan 30, 2011 | 2001 Dodge Dakota

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I have a 2003 jeep liberty giving the code P1494


http://autorepair.about.com/library/faqs/bl010h.htm The Jeep should still be covered under the 10 year emissions warranty. Bring it in to the dealer.

Dec 14, 2010 | 2002 Jeep Liberty

1 Answer

My service engine soon light is on and I have been told the code is 1494. What does that mean?


P1494 is a Leak Detection Pump Switch or Mechanical Fault. 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). This is a problem with evaporative emissions system and should not affect drivability. If this was helpful please leave positive rating.

Nov 30, 2010 | 1999 Dodge Avenger

2 Answers

P1494


The Dodge P1494 engine light code means Leak Detection Pump Switch or Mechanical Fault. A proper diagnosis must be done, you can't simply replace the LDP and expect that to fix the problem. It shouldn't hurt anything to keep driving it for a while until you can get it fixed.
There is a technical service bulletin that applies to your vehicle and it mentions that code specifically. I'm including it here for your information: TSB-18-01-00
SUBJECT: Misdiagnosed Leak Detection Pump Systems With DTC P1494, P0442, P0455, OR P0456.
MODELS: 1997 - 2000 (LH) Concorde/Intrepid/LHS/300M/Vision and others
DISCUSSION:
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.

Hope helps (remember rated and comment this).

Sep 08, 2010 | Dodge Dakota Cars & Trucks

2 Answers

Engine light on with code 1494runs ok for now but light want stay off when i have it taken off, was told it was sensor to motor, but that there was four different ones and they don't know which one it...


P1494 means Leak Detection Pump Switch or Mechanical Fault - This code appears when there's an issue with the EVAP System (fuel tank fumes) This can be caused by a improperly secured gas cap, faulty gas cap, crack in the vacuum line, etc.

Sep 17, 2009 | 2001 Jeep Grand Cherokee

1 Answer

Code 1494


Did you mean p1494? If so then its your evaporative emission ventilation switch or a mechanical fault, probable causes:

  1. Evaporative Emission Ventilation Solenoid failed
  2. An open or short circuit.
  3. Vacuum hose clogged.
  4. PCM Failed
Check the following:

  1. Check the following connectors: A-109, B-76, B-63, A-107. Repair if needed. If its ok then check:
  2. Check the harness wire between the Evaporative Emission Ventilation Solenoid connector. If its ok then:
  3. Replace PCM
This information was retrieved from AllData :

Sep 10, 2009 | 1998 Dodge Grand Caravan

1 Answer

Codes for durango p0443-0753-1765-1494


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.

Sep 05, 2009 | 1999 Jeep Grand Cherokee

1 Answer

96 dodge caravan code p1494


P1494 Leak detection pump pressure or mechanical fault, hope this helps

May 15, 2009 | 1996 Dodge Caravan

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