Question about 2000 Hyundai Accent

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My 2000 hyundai acc

I did a full tune up on my car (2000 accent 1.5) im getting codes p0300 random misfire.....p0301misfire cylinder 1..... p0302 misfire cylinder 2
since i already change sparkplugs,wires, fuel filter, airfilter,pcv valve, im thinking it could be the ignition coils going bad but im not sure...can somebody please help

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  • clrivera05 Mar 04, 2009

    is it possible for plugs to be wrong ones or is it possible the coils can be goingv bad and car still starts

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Possibly coils check compression make sure the plugs are the proper ones some engines are particuler about the plugs

Posted on Mar 04, 2009

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1998 Hyundai Accent p0300 random multiple misfire


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Me aparecio el problema p0300, p0301, p0302 y p0600


p0300 random multiple cylinder misfire, 301 is cylinder 1 misfire and 302 is cylinder 2 misfire. p0600 is a communication link fault.

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1 Answer

P0300


Im assuming your asking about the ODB-II codes, this code,P0300 Random/Multiple Cylinder Misfire Detected.
A P0300 diagnostic 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-firing, nor why.
Here are a few things that could be the cause.
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  • Stuck/blocked EGR valve / passages
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    I would start things out with a tune up, new plugs and wires, wires break down after time and could be grounding out, or arcing between themselves causing a misfire.
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    2002 elantra cyl 2 random misfire


    Hi there:A P0300 diagnostic 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-firing, nor why.

    For example, a P0302 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #2; same condition in P0301 - cyl #1, P0303 - cyl #3 and P0304 - cyl #4.

    A code P0300 (or 301, 302, 303 or 304) may mean that one or more of the following has happened:
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    Burned exhaust valve
    Faulty catalytic converter(s)
    Stuck/blocked EGR valve / passages
    Faulty camshaft position sensor
    Defective computer

    About your possible solutions, if there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

    If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

    Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.


    Hope this helps.

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    Hi there,

    A P0300 diagnostic code indicates a "random" or "multiple" misfire.


    Unfortunately, P0300 doesn't tell you specifically which cylinders are mis-firing, nor why (code P0301 would indicate cylinder #1; P0302 would indicate cylinder # 2 etc). This means there could be an issue with any number of components/circuits relating to the ignition/combustion circuits.


    I would recommend you check for the following:

    • Faulty spark plugs and/or HT leads
    • Faulty coil (pack)
    • Faulty oxygen sensor(s)
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    • Faulty catalytic converter
    • Stuck/blocked EGR valve / passages
    • Faulty camshaft position sensor

    Sometimes the underlying cause of a random misfire is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold, unmetered air getting past the airflow sensor, or even an EGR valve which is stuck open.



    Hope this helps...




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    You describe a 'Misfire' condition. You'll need and OBD!! scanner to retireve any throuble codes stored in the ECU (Engine Control Unit). Once you know which/what code (i.e., P0300 - Random Misfire Detected, or P0302 - Cylinder #2 misfire detected, etc). then you'll know where to go from there - plugs, wires, coil(s), etc.

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