Question about 2002 Jeep Grand Cherokee

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Trouble code P1494

My check engine light is on ,the code it spit out was p1494.
a friend of mine looked up the code and stated it could be three things :
1-Evap leak
2-Detection pump
3-Pressure switch
I think the first one can be fixed with a new gas cap, but the others I don't have a clue . Can any body help me?

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These are all related sensors and active devices of the evap system, clear the code and replace the fuel cap.

Posted on Nov 12, 2008

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1 Answer

The code p1494 comes on after sets all night


That code is for the leak detection pump, (evap) and there is a bulletin which states to check for any kinked hoses in the system.


The LDP is located (generally) in the left/front corner of engine compartment below the air cleaner housing. It is mounted to left/front inner fender sheet metal.



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Sep 25, 2012 | Cars & Trucks

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

1 Answer

P1494 code engine light on


Leak Detection Pump Switch or Mechanical Fault is P1494, Iit is an evaporative emissions device that is used to pressurize. It is located behind the drivers headlight in the engine compartment. May be loose wiring or faulty sensor. Try resetting it or the battery after inspection and see if it continues

Jan 19, 2011 | 2001 Jeep Cherokee

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

1 Answer

Failed smog the reading shows data trouble codes p1494


If you turn the ignition on does the check engine light come on for a few seconds and then shut off? If it doesn't, perhaps the bulb is burnt out or a previous owner removed the bulb?

Jul 02, 2010 | 1997 Jeep Grand Cherokee

1 Answer

My engine light is on and the 2 codes that came up were P0740 and P1494


740 is transmission solenoid #3 failure

p1494 is a leak detection pump

Feb 24, 2010 | 2001 Jeep Cherokee

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

2 Answers

Trouble codes


P0441
Evaporative Emission System Incorrect Purge Flow
P1494
Jeep: Leak detection pump pressure switch or mechanical fault
U either have a leaking fuel system or the pressure sensor at the gas tank is defective, I would replace the pressure sensor 1st.

Jul 02, 2009 | 2000 Jeep 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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