Question about 1999 Jeep Grand Cherokee

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I have a error code for the leak detection pump where is it located i think it is mounted in front of the airbox on the wall the rad is mounted on am i right or wrong thanx

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Most EVAP. leaks are closer to the gas tank, check your vaccuum hoses and purge valve..prob. purge valve ..a common problem

Posted on Jul 19, 2010


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2 Answers

Loosing coolant

Is it leaking externally that you see? If so, you may have leaking freeze plugs on the engine block or cylinder head. If it is not external, then check the exhaust. Are you getting white smoke? Does the exhaust have a sweet smell? You could have a cracked cylinder wall, cylinder head, or blown head gasket. Check the floor inside the vehicle. Is it wet anywhere, especially passenger side front. It could be a leaking heater core. If all else fails, have the system pressure tested by a mechanic to find the source of the leak. Some can be very hard to detect.

Jan 26, 2016 | 2000 Jeep Grand Cherokee

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I rest the code with a scanner after installing the new pcm & ldp still code comes right back also smoke tested & no vissible leaks

That code deals with the leak detection pump , look for leaking hoses under the vehicle coming from the fuel tank , if rotten or torn replace , it can also be the leack detection pump itself which is mounted close to the tank or under the hood if under the hood it will have a black plastic line with a green screw on cap going to thr pump ,it doesnt matter if you cannot find leaks the leak detection pump could be shot and not operating .

Feb 04, 2015 | Cars & Trucks

1 Answer

I have to error code with my jeep grand Cherokee Laredo 1999 the code are 1491,1495,753,136

P1491 Rad Fan Control Relay Circuit An open or shorted condition detected in the radiator fan control relay control circuit. This includes PWM solid state relays.P1495 Leak Detection Pump Solenoid Circuit An open or shorted condition detected in the Leak Detection Pump (LDP) solenoid circuit.P0753 (M) Trans 3-4 Shift Sol/Trans Relay Circuits An open or shorted condition detected in the overdrive solenoid control circuit or Trans Relay Circuit in JTEC RE transmissions. Was MIL code 45. P0753 (M) Trans 3-4 Shift Sol/Trans Relay Circuits An open or shorted condition detected in the transmission 2-4 shift solenoid circuit (4-speed auto. trans. only).P0136 (M) 1/2 O2 Sensor Heater Circuit Malfunction Oxygen sensor heater element malfunction.

Aside from getting into an accident and having your wiring harness severely damaged, the other likely suspect is your PCM. These codes are not related to each other and indicate a much larger problem.

Nov 02, 2013 | 1999 Jeep Grand Cherokee

1 Answer

Check engine light

P1495 indicates a Leak Detection Pump Solenoid Circuit error. The Leak Detection system is located under the hood on the driver's side inner fender. The solenoid is located under or behind the leak detection pump. This system works in conjunction with the EVAP system, and one of the most common error causes is a loose or non-airtight gas cap. Try tightening or replacing your gas cap and see if the code disappears after a normal driving cycle (about 50 miles). Good luck.

Sep 30, 2013 | 2004 Jeep Grand Cherokee

2 Answers

Audi allroad check engine light

This is only a chat room everyone uses the same
There is no info here
With a EURO Car, your going to have to try & google
the codes you have & hope they are on the internet, or
you can even find manfacture suspension codes
I don't think there is any chance you can work on that
yourself & certainly not without factory manuals &
scan tool software for european vehicles

Aug 08, 2013 | Cars & Trucks

1 Answer

I have a dodge grand caravan 96 itruns but wen i stop it just trowes masfires and i run the machine gave me code p1495 i think is a sensor but dont noe were it is

code P1495 leak detection pump solenoid circuit malfunction. the leak detection pump located underneath the vechicle right behind lower left corner of the engine compartment.

Oct 05, 2012 | Cars & Trucks

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

Antifreeze leak

Most sudden leaks are caused by worn water pumps seals or a blown rad hose. depends on amount and location. the water pump has a weep hole on it, just behind the pulley if it is mounted on the front cover of the engine. if it is inside the timing cover the antifreeze will seem to be coming out of the engine. best way to find it is to wash the engine and then try to locate the area where it starts. a small mirror usually helps.

Jan 20, 2010 | 1992 Chevrolet Lumina

1 Answer

Fix P1494 code

This code is caused by the leak detection pump for the evaporative emissions control system, this is a common fault in your year and model, there are factory bullentins about the code, to replace the pump do the following. As noted in the procedure pay close attention to the condition of the vacuum lines to the pump.

The LDP, (leak detection pump) is located in the left/front corner of engine compartment below the air cleaner housing. It is mounted to left/front inner fender sheet metal. The LDP and LDP filter are replaced (serviced) as one unit.

Mar 04, 2009 | 2002 Jeep Grand Cherokee

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