Question about Volvo S80

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Mi car is a volvo s80 2004 5 cilinders

The check engine light is on the code is p2407 and i change the ldp but the problem is the same i don't know what i can do somebody helpme please

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  • Kyle Steven OHare
    Kyle Steven OHare May 10, 2017

    The computer is still detecting a leak in your evap system. Check for leaks and the following:

    The leak detection pump/solenoid may be malfunctioning
    A faulty purge valve may be present
    A clogged or damaged charcoal canister
    Wiring or connectors associated with the emissions control system could be damaged
    The gas cap could be installed improperly
    A crack in a fuel or vacuum line could be present
    The fuel pressure sensor may be malfunctioning
    The powertrain control module may not be performing properly



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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: engine management light volvo s40 problem

The best thing is to go to your local Volvo maintenance shop or Volvo experts to find out whats the problem..usually the coomon ones I think is the programs inside its ECU try this..ask the volvo experts to reset the ECU and lets see..if problem arise then it is no doubt you might need the sensor..hope this help..

Posted on Nov 03, 2008

  • 3854 Answers

SOURCE: check engine light code PO442

You likely won't notice any drivability problems. P0442 indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. 
The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage.
Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

With a P0442, the most common repair is to Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back. Otherwise, replace the gas cap, or Inspect the EVAP system for cuts/holes in tubes/hoses.

Good luck and hope this helps

Posted on May 07, 2009

  • 2841 Answers

SOURCE: How do you reset the check engine light on a volvo

The Check Engine light has nothing to do with changing the oil. The light is on because there is a problem with the emissions system. Even if you reset the light it will just come back on unless the problem causing it to come on is repaired. You will need to have the ECU scanned with an OBD2 scan tool. That tool will retrieve the code that has been set by the ECU. The code will tell you what part is being effected, but not necessarily what part or parts are defective. To determine that takes training, experience, and diagnostic skills. I suggest you seek professional help. If the engine is running fine there is no hurry but if it is not running as it should, then do not put this off.

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SOURCE: i have honda accord 2001 4 cilinder automatik the

P1705 Automatic Transaxle (Acura, Honda)

Posted on Jul 11, 2010

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SOURCE: 2001 ford taurus 3.0 v6 code p0306 misfire

Please go to this page for engine misfire causes.

Posted on Aug 08, 2012

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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: P1495 Dodge EVAP Leak Detection Pump Solenoid Circuit Condition

Aug 10, 2015 | Dodge Caravan Cars & Trucks

1 Answer


Go to any advanced or discount auto and they will tell you what the code is dont know your model or what you have,You can even go to this helps

Oct 25, 2012 | 2002 Volvo S80

2 Answers

The "check engine" panel light indicator came on

It is a EVAP system leak
Detect pump sens CKT

First thing to try is to replace the gas cap.
Then the evap canister solenoid or the hose that goes to it.

Dec 03, 2010 | Volvo XC90 Cars & Trucks

1 Answer

Leak detection pump sw or mechanical fault

can be caused by failure of the evaporation system leak detection pump or reed switch. When you turn your key on, the LDP sometimes comes on briefly to pressurize the fuel tank. The PCM enables a solenoid value in the pump to allow engine vacuum to shift a diaphram that pressurizes the system. Locate the LDP if the left rear bumper/fender well. With the engine running, remove the vacuum hose to see if vacuum from the engine is being supplied to the pump. If not, check the hose connection at the engine intake manifold. Repair or replace the hose as necessary to restore vacuum to the LDP.
If the engine vacuum is present, the problem may be with the pump or the electrical power to the pump solenoid. You can check the power to the solenoid by removing the connector and probing the connector with a 12 volt test light. Connect the test light clip to a ground point on the frame and probe the cable terminals. With the car running, one of the terminal should light the test light. If not, the problem is the wiring to the alternator. If the test light comes on, replace the LDP. Please let me know if you have any questions.

EVAP Leak Detection Pump Description & Operation
The evaporative emission system is designed to prevent the escape of fuel vapors from the fuel system. Leaks in the system, even small ones, can allow fuel vapors to escape into the atmosphere. Government regulations require onboard Testing to make sure that the evaporative (EVAP) system is functioning properly. The leak detection system tests for EVAP system leaks and blockage. It also performs self-diagnostics. During 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.
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. The diaphragm is powered by engine vacuum. It pumps air into the EVAP system to develop a pressure of about 0.25 psi. A reed switch in the LDP allows the PCM to monitor the position of the LDP diaphragm. The PCM uses the reed switch input to monitor how fast the LDP is pumping air into the EVAP system. This allows detection of leaks and blockage.
The LDP assembly consists of several parts. The solenoid is controlled by the PCM, and it connects the upper pump cavity to either engine vacuum or atmospheric pressure. A vent valve closes the EVAP system to atmosphere, sealing the system during leak Testing. The pump section of the LDP consists of a diaphragm that moves up and down to bring air in through the air filter and inlet check valve, and pump it out through an outlet check valve into the EVAP system. The diaphragm is pulled up by engine vacuum, and pushed down by spring pressure, as the LDP solenoid turns on and off.
The LDP also has a magnetic reed switch to signal diaphragm position to the PCM. When the diaphragm is down, the switch is closed, which sends a 12v (system voltage) signal to the PCM. When the diaphragm is up, the switch is open, and there is no voltage sent to the PCM. This allows the PCM to monitor LDP pumping action as it turns the LDP solenoid on and off.
Diaphragm Downward Movement
Based on reed switch input, the PCM de-energizes the LDP solenoid, causing it to block the vacuum port, and open the atmospheric port. This connects the upper pump cavity to atmosphere through the EVAP air filter. The spring is now able to push the diaphragm down. The downward movement of the diaphragm closes the inlet check valve and opens the outlet check valve pumping air into the evaporative system. The LDP reed switch turns from open to closed, allowing the PCM to monitor LDP pumping (diaphragm up/down) activity.
During the pumping mode, the diaphragm will not move down far enough to open the vent valve. The pumping cycle is repeated as the solenoid is turned on and off. When the evaporative system begins to pressurize, the pressure on the bottom of the diaphragm will begin to oppose the spring pressure, slowing the pumping action. The PCM watches the time from when the solenoid is de-energized, until the diaphragm drops down far enough for the reed switch to change from opened to closed. If the reed switch changes too quickly, a leak may be indicated. The longer it takes the reed switch to change state, the tighter the evaporative system is sealed. If the system pressurizes too quickly, a restriction somewhere in the EVAP system may be indicated.
Diaphragm Upward Movement
When the PCM energizes the LDP solenoid, the solenoid blocks the atmospheric port leading through the EVAP air filter and at the same time opens the engine vacuum port to the pump cavity above the diaphragm. The diaphragm moves upward when vacuum above the diaphragm exceeds spring force. This upward movement closes the vent valve. It also causes low pressure below the diaphragm, unseating the inlet check valve and allowing air in from the EVAP air filter. When the diaphragm completes its upward movement, the LDP reed switch turns from closed to open.

Removal & Installation
The Leak Detection Pump (LDP) is located under the left quarter panel behind the left/rear wheel. It is attached to a two-piece support bracket. The LDP and LDP filter are replaced (serviced) as one unit.

  1. Remove stone shield behind left/rear wheel. Drill out plastic rivets for removal.
  2. Remove 3 LDP mounting bolts.
  3. Remove support bracket brace bolt.
  4. Loosen, but do not remove 2 support bracket nuts at frame rail.
  5. To separate and lower front section of two-piece support bracket, remove 3 attaching bolts on bottom of support bracket. While lowering support bracket, disconnect LDP wiring clip.
  6. Disconnect electrical connector at LDP.
  7. Carefully remove vapor/vacuum lines at LDP.
  8. Remove LDP.

To Install:
  1. Position LDP and carefully install vapor/vacuum lines to LDP and LDP filter.
    WARNING The vapor/vacuum lines and hoses must be firmly connected. Check the vapor/vacuum lines at the LDP; LDP filter and EVAP canister purge solenoid for damage or leaks. If a leak is present, a Diagnostic Trouble Code (DTC) may be set.
  2. Connect electrical connector to LDP.
  3. While raising front section of support bracket, connect LDP wiring clip.
  4. Install 3 LDP mounting bolts.
  5. Join front and rear sections of two-piece support bracket by installing 3 bolts on bottom of support bracket. Do not tighten bolts at this time.
  6. Install support bracket brace bolt. Do not tighten bolt at this time.
  7. Tighten 2 support bracket nuts at frame rail and 3 support bracket bolts and brace bolt.
  8. Position stone shield behind left/rear wheel. Install new plastic rivets.
  9. jturcotte_55.gif

Nov 05, 2010 | 2000 Jeep Grand Cherokee

1 Answer

I have a 2006 Volvo S40 and the check engine light has recently come on. I just had the 60k mi service about a month ago.

Have the vehicle scanned at a local parts store and have them retrieve the code. Once you have the code, let me know and we can diagnose it properly and effectively.

Oct 25, 2010 | 2006 Volvo S40

1 Answer

P1495 Where is the problem???? Check engine ligth is on

Code P1495 is for the LDP solenoid circuit. (LDP-Leak Detection Pump). This is a system that seals off the evaporative system of the car and then pressurizes it with the LDP. The computer looks to see how long it takes to pressurize the system, (depending on fuel level) and then determines if the system is leaking. Emissions regulations require this to cut down on fuel vapours from escaping to the atmosphere. Since the light is on, it means the fault is still there since you replaced a part that has nothing to do with the evaporative system. You will likely have to get a dealer to diag this, unless you can get access to a shop manual and DRB scan tool. Keep in mind, there are a lot of reasons why the check engine light can be turned on. Unless you know what the code is and how to track down the fault, there is no point in replacing any parts as the odds of getting it right the first time is highly unlikely.

Aug 30, 2010 | 1996 Dodge Grand Caravan

2 Answers

03 grand caravan ex 3.8. check engine light - code po456/evap sys small leek. tried new fuel cap, light still on. What hoses can I look for to find a leak?? or could it still be fuel cap and sensor needs...

Customer Concern: MIL on and code P0456 for a leak in the evaporative system. How to test the Leak Detection Pump (LDP). Tests/Procedures: 1. With the engine running, connect a test light to the Violet/White wire at the LDP. The test light should light.

2. Ground the center wire at the LDP. The test light should go out. This is the intake stroke of the pump. The LDP pulls in fresh air when the center wire is grounded with a vacuum supply to the LDP.

3. Remove the ground from the center wire and the test light should light up again. The pump has just pumped air into the evaporative system. The test light lights up when the diaphragm is in the down position.

4. To test the LDP for leaks, cap off the port that goes to the canister or to the vent valve. This is the port that is slightly above the bottom port that goes to the vent filter.

5. Now try to cycle the LDP again by grounding the center wire. The test light will still go out but now when the ground is removed from the center wire, the test light should remain out for at least 20 seconds if the LDP is good. Potential Causes: Leak Detection Pump (LDP)
Vent Valve

Oct 16, 2009 | 2002 Dodge Grand Caravan

1 Answer

2001 durango rear window defog light flashing

What code is it showing for the leak detection pump ? That pump along with all sensors on the vehicle can set more then one code , most can set half a dozen ! Circuit volt high , circuit voltage low , open , short to power , short to ground etc... You probably have a wiring problem , I'd say it's time to find a new mech. Plus you can not just swap PCM/ECM - engine computers , they need to be reconfigured an programmed . Or other problems will pop up . With the check engine light on codes or set !

May 22, 2017 | 2001 Dodge Durango

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