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I have several codes in my car, it is a 2004 optra 2.0 litre, code is p0300, random misfire detected, another code is p1405, exhaust gas recurlation sensor a circuit low, p0342, crank shaft shat position sensor a circuit low input bank one or single sensor, p0700, transmission control system, mil request, could u tell me the repair for each of these problems, thanks

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  • Regal Lace Jun 06, 2010

    thank you very much for your help greatly appreciate it, regal

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Random misfire error code p0300 is solved by replacing the spark plugs and spark plug wires. Error code p1405 is solved by replacing the EGR valve. Error code p0342 is solved by replacing the camshaft sensor. Error code p0700 is a trans control problem in the trans computer.
You will need to get it on a trans capable scanner to see what the trans code and problem is inside the transmission

Posted on Jun 06, 2010

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Starts up but runs rough, exhaust smells, and when you give it gas it wants to shut off.


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2005 Buick Las 4 door Code p0300


Not much.
Code 300 is for a random miss. The engine computer has detected more than one cylinder that is not producing power, but no one cylinder is constant.
Until you get a code like 301 or 303 its a guessing game. 301-306 would tell you which cylinder is being the problem.
The cause could be fuel or spark.

Aug 30, 2015 | Buick Cars & Trucks

2 Answers

Has p0300 code misfire cyl 2 and 3


If it was just cylinder 2 or 3, the code would be 0302 or 0303. Instead, you have random misfires (probably) such that you should be checking things that affect the whole engine. Vacuum leaks, bad plug wires, bad coil(s) or ignition module are most likely, but even clogged exhaust, O2 sensors and bad battery can cause these problems. Yes, a battery can be good enough to start your car but still be bad enough to affect performance. If I had to guess, I would start by testing the ignition module. Most parts stores can test this if you remove it and carry it to them.

May 04, 2015 | 1998 Chevrolet Blazer

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.
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer

    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.
  • Jul 05, 2012 | Cars & Trucks

    1 Answer

    When my car is ran on computer is has cose PO300 PD. What does this indicate?


    DTC P0300 - Random/Multiple Cylinder Misfire Detected
    Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.

    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.

    Hope this helps.

    Oct 03, 2011 | 2004 Chevrolet Malibu

    2 Answers

    What does code p0300 mean for a 2004 chevrolet cavalier-car is sputtering and stalling when idiling


    P0300 - Random/Multiple Cylinder Misfire Detected

    Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.

    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.

    Symptoms may include:
    * the engine may be harder to start
    * the engine may stumble / stumble, and/or hesitate
    * other symptoms may also be present

    Causes: A code P0300 may mean that one or more of the following has happened:
    * Faulty spark plugs or wires
    * Faulty coil (pack)
    * Faulty oxygen sensor(s)
    * Faulty fuel injector(s)
    * Burned exhaust valve
    * Faulty catalytic converter(s)
    * Stuck/blocked EGR valve / passages
    * Faulty camshaft position sensor
    * Defective computer

    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.

    Keep us updated and remember to rate this answer.

    Jan 01, 2011 | 2004 Chevrolet Cavalier

    1 Answer

    Mazda mpv 2004 code p0304


    Engine missfire Cylinder #4

    P0300 at P0304 Diagnostic Code - Random Misfire
    Technical Description
    Random/Multiple Cylinder Misfire Detected

    What does that mean?
    Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.

    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.

    Symptoms may include:
    * the engine may be harder to start
    * the engine may stumble / stumble, and/or hesitate
    * other symptoms may also be present

    Causes
    A code P0300 may mean that one or more of the following has happened:
    * Faulty spark plugs or wires
    * Faulty coil (pack)
    * Faulty oxygen sensor(s)
    * Faulty fuel injector(s)
    * Burned exhaust valve
    * Faulty catalytic converter(s)
    * Stuck/blocked EGR valve / passages
    * Faulty camshaft position sensor
    * Defective computer

    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 help with this (remember comment and rated this).

    Apr 24, 2010 | 2005 Mazda MPV

    2 Answers

    Obd codes p0300 p0301 p0303 p0305 p0401


    P0401 Exhaust Gas Recirculation Insufficient Flow Detected

    P0300 Random/Multiple Cylinder Misfire Detected
    P0301 Cylinder 1 Misfire Detected
    P0303 Cylinder 3 Misfire Detected
    P0305 Cylinder 5 Misfire Detected


    I would check out the EGR valve. That maybe what is causing all the misfires.

    Mar 24, 2009 | 1997 Toyota Camry

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