Question about 2004 Chrysler Concorde

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How do i service the gas evaporative system. It sets the MIL light, please ?

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First, replace the fuel cap. Check all EVAP vacuum hoses for disconnection, cracks or breaks. If all hoses are good, clear the codes with an OBD II scan tool and recheck after two days. If the MIL light comes back on after you clear it then replace the NVLD assembly and charcoal filter.

Posted on Sep 06, 2010

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Posted on Jan 02, 2017

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Codes351/420/442/455 what do they mean


(M) Check Engine Light ("Malfunction Indicator Light" or "Check Engine") will illuminate during engine operation if this Diagnostic Trouble Code was recorded (depending if required by CARB and/or EPA). MIL is displayed as an engine icon on the instrument cluster.

P0351 (M)
Ignition Coil A Primary/Secondary Circuit
Peak primary circuit current not achieved with maximum dwell time.

P0420 (M)
Catalyst System Efficiency Below Threshold (Bank 1)
Catalyst 1/1 efficiency below required level.

P0442 (M)
Evaporative Emission Control System Leak Detected (medium leak)
A 0.040 leak has been detected in the evaporative system. (A faulty gas cap may cause this code). Also see TSB 25-001-02A. Note: The respective Powertrain Diagnostic Procedures Manual will direct the technician to determine if the vehicle evaporative system has an external system leak. Examples of some external system leaks are: a loose gas cap, a disconnected evaporative system hose, or a loose hose connection. Remember that the evaporative system may also have an internal system leak. This internal leak may be caused by an intermittent or permanently stuck open Duty Cycle Purge (DCP) valve. This leak source is considered to be internal because any escaping emissions enter into the engine system and not directly into the atmosphere, unlike an external leak. An internal leak may cause one of the above DTC?s. Possible causes of a stuck open (intermittent or permanent) DCP valve are: 1. Corrosion due to system moisture or possible water intrusion into the system.

P0455 (M)
Evaporative Emission Control System Leak Detected (large leak)
A large leak has been detected in the evaporative system. See TSB 25-001-02. Also, possible faulty or loose gas cap. Note: The respective Powertrain Diagnostic Procedures Manual will direct the technician to determine if the vehicle evaporative system has an external system leak. Examples of some external system leaks are: a loose gas cap, a disconnected evaporative system hose, or a loose hose connection. Remember that the evaporative system may also have an internal system leak. This internal leak may be caused by an intermittent or permanently stuck open Duty Cycle Purge (DCP) valve. This leak source is considered to be internal because any escaping emissions enter into the engine system and not directly into the atmosphere, unlike an external leak. An internal leak may cause one of the above DTC?s. Possible causes of a stuck open (intermittent or permanent) DCP valve are: 1. Corrosion due to system moisture or possible water intrusion into the system.

May 01, 2014 | Jeep Grand Cherokee Cars & Trucks

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Emissions Code


Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
- Purge control VSV connector disconnected.
- Evaporative Emission (EVAP) Canister Purge Regulator Valve is faulty/jammed.
- Evaporative Emission (EVAP) Canister Purge Solenoid Valve faulty/jammed.
- Evaporative Emission (EVAP) Canister Sealing faulty.
- Pipes between Tank Breathing and Throttle Body leaky/blocked.
- Hose connection(s).
- Intake leak.
Solutions:
- Check Evaporative Emission (EVAP) Canister Purge Regulator Valve.
- Perform Output Test.
- Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve.
- Check Evaporative Emission (EVAP) Canister.
- Perform Basic Setting.
- Check Pipes between Tank Breathing and Throttle Body.

Jan 10, 2014 | Toyota Cars & Trucks

1 Answer

Ran completely out of gas last week - put gas in - car started fine- ran a little rough and idled rough. Now 10 days later MIL light on in dash and perform service message. Won't go out after several


have the fuel filter changed and have the computer checked for codes incase something else is going on and they can be cleared to turn off the light.any dirt in the lines should be out of them by now.its possible that there is dirt in the injectors and a fuel system service should be done to clean them which is a recomended service on all cars anyways.you can have the fuel pressure checked while its in the shop to make sure the pressure is within specs.

Nov 01, 2011 | 2004 Jeep Grand Cherokee

2 Answers

My gascap light on my 2008 jeep liberty came on today and i took off the gas cap and put it on again but the light remains on. how can i turn it off?


If the cap is good and the venting system is working properly the code should re-set itself in about twenty miles of driving.

Dec 28, 2010 | 2008 Jeep Liberty

2 Answers

Check Engine lite comes on Code PO440


16824/P0440/001088 - EVAP Emission Control Sys: Malfunction Possible Symptoms
  • Malfunction Indicator Light (MIL) active
Possible Causes
  • Evaporative Emission (EVAP) System leaking
  • Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80) faulty
  • Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115) faulty
Possible Solutions
  • Check Evaporative Emission (EVAP) System Sealing
  • Check Evaporative Emission (EVAP) Canister Purge Regulator Valve (N80)
  • Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve (N115)

Jun 17, 2010 | 2000 Volkswagen Beetle

1 Answer

Went on trip, drove a little over 500 miles to destination. When went from one freeway to another car seemed to go into a limp mode after slowing to bout 20- 25 mph. I reset by putting it in park turning...


PO456 is most times a gas cap or gasket,
to get an incorrect gear ratio the transmission has probably started to slip.

Change the fluid and filter first off in the transmission and use only atf+4 fluid and possibly the govenor pressure sensor,and change gas cap.

Jun 02, 2010 | 2003 Dodge Intrepid

2 Answers

El ploblema es que prende la luz de las mil y sale el codigo p2420 y p0441


P0441 Evaporative Emission Control System Incorrect Purge Flow
P2420 Evaporative Emission System Switching Valve Control Circuit High

Ambos avisos estan referidos al sistema de emisiones y las valvulas de pruga que lo componen. Revisa alguna fuga en el canister, a veces un caniester defectuoso causa falla en las valvulas.

Se pueden hacer unas pruebas inyectando gas a presion para detectar posibles fugas.

Aqui hay un TSB (Technical Service Bulletin) referido a estas fallas, aplicable a ciertos modelos 2005.

Espero haberlo ayudado (recuerda calificar esta ayuda) Buena suerte.

Nov 26, 2009 | 2008 Toyota Yaris Sedan

2 Answers

Service engine light comes on 2006 pontiac blonnie, code 0440, what is it and how do I fix it


First thing to check is whether the gas cap is on tightly. If it is, the next would be to replace the gas cap. That solves 90% of these problems.

P0440 is a generic code for Evaporative Emission Control System Malfunction... pretty much for all makes. It takes 1 malfunction to create a pending DTC... at 2 consecutive malfunctions the MIL(Malfunction Indicator Light,Check Engine Light, etc.} Ok, after you fix it, it should take 3 trips to turn off the light, then 40 more to Remove the code from the computers memory

Oct 04, 2009 | 2005 Pontiac Bonneville

2 Answers

P0441 EVAP Control System Incorrect Purge Flow


Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Evaporative Emission (EVAP) Canister Purge Regulator Valve faulty/jammed.
Evaporative Emission (EVAP) Canister Purge Solenoid Valve faulty/jammed.
Evaporative Emission (EVAP) Canister Sealing faulty.
Pipes between Tank Breathing and Throttle Body leaky/blocked.
Hose connection(s).
Intake leak.
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve.
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.
VSV connector near air filter box disconnected.

Jun 15, 2009 | 1996 Chevrolet Monte Carlo

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