Question about 2002 Dodge Durango

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Evap system errors, cylinder misfires....

Hi. i bought a 2002 dodge durango used. the next day the engine light come on. i get a obd tool and it tells me that i have an evap system low flow, cylinder misfire. i changed the spark plugs and it helped the truck start up better but still poor. i ran a fuel system cleaner through it and it isnt idling horrible anymore. but the engine light keeps coming on. plz help

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  • obryan_valen May 22, 2009

    thank you. i'll go and get one.
    one quick question.....
    a friend of mine told me that it could be my fuel filter, could he be right?


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It is VERY common for the gas cap seals to go bad and cause an EVAP leak that generates a code.. i have seen alot of this in recent years, these cars now have pressurized systems....good luck! it could be a quick and cheap repair!

Posted on May 22, 2009

  • MARTY
    MARTY May 22, 2009

    IT IS POSSABLE, however the filer is in the fuel feed line, and is not pressure monitored by the computer..

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P0506, P0411, P0171


For OBD code problems check the list of help links below. Click the link below to go through its procedure.

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This will help.

Thanks.


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1 Answer

In my 2002 dodge durango myh check engine light is on and I took it to auto zone to have them check the engine codes. Upon the completion of the test I got 4 engine codes P300 P301 P302 and P0442. The...


Do you know how to test electrical circuits ? Is the PCM - engine computer controlling the coils ? Test with a test light ! One side has B+ voltage the dark green with orange stripe wire ,the other goes to the PCM , which will suppy a ground when triggered . You can test this with a test light . or you can buy a noid light at the parts store . If you replaced the coil an spark plug an that code comes back ,could have a burnt driver inside the computer , test it first !
How to test computer transistor driver without scan tool

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1 Answer

2005 Dodge Durango


The p0300 What does that mean? Basically this means that the the car's computer has detected that not all of the engien's cylinders are firing properly.
A P0300 OBD DTC code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-
==================================
The p0430 What does that mean? Basically this means that the O2
downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions
system.

Apr 26, 2009 | 2005 Dodge Durango

1 Answer

Engine light comes on - Code shows P0300 and then


OBD II 300 Random/Multiple Cylinder Misfire Detected

When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.

Possible Causes:

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

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