Question about 1991 Jeep Wrangler

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Missing the leak detection pump. where can I get one

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  • juk4 Sep 10, 2010

    I found this in formation in a manual for a TJ. would it apply to a YJ as well? I found connections for the pump from the fuel tank, but no pump exists.

    The Leak Detection Pump (LDP) is attached to a
    bracket located to the rear of the right / rear tire
    under the plastic wheelhouse liner. The main purpose of the LDP is to pressurize the
    fuel system for leak checking. It closes the EVAP system
    vent to atmospheric pressure so the system can
    be pressurized for leak testing.

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  • Jeep Master
  • 22,133 Answers

Please explain what you mean by leak detection ?? for what ---

Posted on Sep 09, 2010

  • Colin Stickland
    Colin Stickland Sep 10, 2010

    to be honest never even knew it had one ,my best advice is if the vehicle performs ok and is reliable then leave well alone and do not worry about it

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3.3l engine. What are the probable causes of DTC P1495?


answer courtesy of engine codes .com Engine-Codes OBDII Code List P1495 Dodge
P1495 Dodge P1495 Dodge - EVAP Leak Detection Pump Solenoid Circuit Condition 3 ' Add Comment Possible causes
- Faulty Leak Detection Pump (LDP)
- Leak Detection Pump (LDP) harness is open or shorted
- Leak Detection Pump (LDP) poor electrical connection
What does this mean? When is the code detected?
Malfunction is detected when the Powertrain Control Module (PCM) detected the pump solenoid did not change status when activated,
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors
P1495 Dodge Description
The Evaporative emissions system is design to prevent the escape of fuel vapors from the fuel system. Leaks in the system, ca allow vapors to escape into the atmosphere. The leak detection system tests for EVAP system leaks and blockage.
During the self-diagnostics, the Powertrain Control Module (PCM) first checks the Leak Detection Pump (LDP) for electrical and mechanical faults. If the first checks pass, the PCM then uses the LDP to seal the vent valve and pump air into the system to pressurize it. If a leak is present, the PCM will continue pumping the LDP to replace the air that leaks out. The PCM determines the size of the leak based on how fast/long it must pump the LDP as it tries to maintain pressure in the system.

Read more: http://engine-codes.com/p1495_dodge.html#ixzz3iQ8P3JII P1495 Dodge EVAP Leak Detection Pump Solenoid Circuit Condition

Aug 10, 2015 | Dodge Caravan Cars & Trucks

1 Answer

What is a P2404 code mean from a suzuki sx4


Trouble Code: P2404 (2.0L L4 VIN 5 Automatic CVT)
Evaporative Emission System Leak Detection Pump Sense Circuit Range / Performance
Number of Trips to Set Code: 1
Trouble Code Conditions:
EVAP vent valve stuck open: EVAP leak check pressure is lower than -0.14 kPa even if EVAP vent valve is operated from OFF (OPEN) to ON (CLOSE) with EVAP leak detection pump ON. EVAP vent valve stuck closed: EVAP leak check pressure is unstable (difference between maximum and minimum is 0.36 kPa or more) when EVAP vent valve is OFF (OPEN) with EVAP leak detection pump ON. EVAP leak detection pump stuck OFF: EVAP leak check pressure is higher than -0.14 kPa even if EVAP leak detection pump is ON. EVAP leak detection pump flow high: Reference pressure of EVAP leak check pressure is lower than specified value (depending on BARO) EVAP leak detection pump flow Low: Reference pressure of EVAP leak check pressure is higher than specified value (depending on BARO).
Possible Causes:
  • EVAP leak detection pump (in EVAP leak check module) and/or its circuit
  • EVAP vent valve (in EVAP leak check module) and/or its circuit
  • EVAP leak check module and/or its circuit
  • ECM

Jul 11, 2014 | 2010 Suzuki SX4

1 Answer

What does the code p0456 mean?


Here's what comes up.click on link.Trouble Code: P0456

EVAP Small Leak (0.020") Detected

Possible Causes:


EVAP fuel tank or canister vapor hoses leaking or damaged.EVAP system component leaking, fuel cap loose or missing.Leak detection pump damaged or leaking.

Oct 22, 2012 | 2001 Chrysler Concorde

2 Answers

Code po455 2004 chrysler sebring 2.4l sohc G vin code


The code is for a large leak in the fuel tank or evap system.

Some possible cause are - a leaking fuel tank, gas cap, hoses to and from the vapor canister and engine, and a faulty canister.
It's possible a valve is stuck open and allowing the engine to pull fumes in when the system is supposed to be closed, but if this were the case the computer should also set a code for that valve.

Here is the definition.

P0455 CHRYSLER Description The Evaporative emissions (EVAP) system is design to prevent the escape of fuel vapors from the fuel system. Leaks in the system, ca allow vapors to escape into the atmosphere. The leak detection system tests for EVAP system leaks and blockage.


During the self-diagnostics, the Powertrain Control Module (PCM) first checks the Leak Detection Pump (LDP) for electrical and mechanical faults. If the first checks pass, the PCM then uses the LDP to seal the vent valve and pump air into the system to pressurize it. If a leak is present, the PCM will continue pumping the LDP to replace the air that leaks out. The PCM determines the size of the leak based on how fast/long it must pump the LDP as it tries to maintain pressure in the system.
Read more: http://engine-codes.com/p0455_chrysler.html#ixzz24EH3F11s

Aug 21, 2012 | Chrysler Sebring Cars & Trucks

1 Answer

Where is the location of code p1495 leak detection pump solenoid circuit


The Solenoid circuit is part of Emission control.To get more info i suggest you to check the two help links given below:---Click the link below:----How to replace Leak detection pump solenoid circuit?
http://repairhelpcenter.blogspot.in/2012/05/leak-detection-pump-solenoid-circuit.html
-----------------P1495 Leak Detection Pump Solenoid Circuit?
http://howtobyme.blogspot.in/2012/05/p1495-leak-detection-pump-solenoid.html

-----------------
This will help.
Thanks.

May 31, 2012 | Chrysler 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

P0455 is coming up what can be the problem on a pacifica


P0455 - Evaporative Emission Control System Leak Detected (Gross Leak)


Possible causes - Missing Fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- Incorrect fuel tank vacuum relief valve
- Leak is in line between intake manifold and evap pressure pump

Feb 18, 2011 | 2006 Chrysler Pacifica

1 Answer

How do i replace the natural vacuum leak detection pump on a 2005 dodge dakota?


Vehicles equipped with NGC engine control modules use an NVLD pump and system. Vehicles equipped with JTEC engine control modules use a leak detection pump. Refer to Leak Detection Pump (LDP) for additional information.
The Natural Vacuum Leak Detection (NVLD) system is the next generation evaporative leak detection system that will first be used on vehicles equipped with the Next Generation Controller (NGC). This new system replaces the leak detection pump as the method of evaporative system leak detection. This is to detect a leak equivalent to a 0.020 (0.5 mm) hole. This system has the capability to detect holes of this size very dependably.


Removal & Installation
  1. Raise and support vehicle.
  2. Remove left-rear tire.
  3. Remove plastic shield (4) in front of left-rear tire. Access to both the EVAP canister (1) and NVLD pump (6) is from the area in front of the removed tire.
  4. Disconnect electrical connector at NVLD pump.
  5. Remove vapor line at NVLD pump. Pry outward on tab (3) and rotate pump (6) clockwise about 70 for removal.
  6. Remove NVLD pump O-ring (5) from EVAP canister (1).
To Install:
  1. Install new NVLD pump O-ring (5) to EVAP canister (1).
  2. Position NVLD pump (6) into EVAP canister (1).
  3. Rotate pump (6) until tab aligns with notch in EVAP canister (1).
  4. Carefully install vapor/vacuum lines to NVLD pump.
    WARNING The vapor/vacuum lines and hoses must be firmly connected. Check the vapor/vacuum lines at the NVLD pump, filter and EVAP canister purge solenoid for damage or leaks. If a leak is present, a Diagnostic Trouble Code (DTC) may be set.
  5. Connect electrical connector to pump.
  6. Install plastic shield in front of left-rear tire.
  7. Install left-rear tire.

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    Fig.


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    Fig.

Have a nice day (remember rated this help).


Mar 05, 2010 | 2004 Dodge Dakota

3 Answers

What is the error code p0455 on Chrysler Town and Country?


P0455....Evaporative Emission Control System Leak Detected (gross leak
the first thin to check is your gas cap

Nov 14, 2009 | 2003 Chrysler Town & Country

1 Answer

NEED TO FIX THE LEAK DETECTION PUMP ON A 1999 JEEP GRAND CHEROKEE


it may not be the leak detection pump..what codes did it show...a cracked hose going to the pump..the purge solenoid or the fuel pump can cause a leak

Nov 13, 2008 | 1999 Jeep Grand Cherokee

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