Question about 2001 Mitsubishi Montero Sport 4WD

2 Answers

01 montero sport 4x4 p0300 code random misfire very sluggish and idle is lower than normal. will come and go but is getting worse

When the service light is on the vehicle shakes a little and sluggish

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  • fiveftgoddes
    fiveftgoddes Jun 06, 2012

    I'm having the same issue. IT's been at the Mitsubishi dealership for 2 days now and they say they can't find the issue.And will have to keep it another day and it will cost me more money to find the issue. Very unhappy camper right now.

  • Anonymous Jul 06, 2017

    I know this is an old post but it may help someone in the future. This same exact issue just happened to a friend of mine. After many days of research and doing a complete tune-up, the problem was an Ignition Module. This was a $150 part at our local parts store. We pulled the module off and got the manufacturer part number off of it, his was LX604, and ordered a brand new one off eBay for $17 with free shipping. It runs like a brand new vehicle now. No more skipping and throwing the P0300 code.

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  • Mitsubishi Master
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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.

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

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 this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Posted on Feb 10, 2012

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Hi , i had the same problem , with high gas consumption. i fix it .i changed the battery and everything went allright. just check your battery for montero sports it should be at least 70 amp.

Posted on Feb 21, 2013

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localwonder
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SOURCE: check engine light

this light is warning you of a serious issue concerning a failed sensor in the engine. you will need to run this vehicle in the nearest dealership for a diagnostic scan on the ecm/pcm device. this scan will give detailed info on the location of the problem and how to fix it. this scan cpu will also reset the light and it will shut off once the issue is fixed.

If you just want to shut the light off, you can just pull the battery post for a minute. this will reset the ecm but, if the issue is not fixed, the light will come back on in the coming days.

Posted on May 22, 2009

  • 333 Answers

SOURCE: 4x4 light flashes all times(montero mitsh. sport)

The 4WD center diff light will flash when there is a vacuum malfunction in the front axle activating solenoid.

If this is happening, you likely have a bad Freewheel solenoid pack, they fail very regularly due to their location. Is is located on the passenger side fenderwell below the airbox; it is a pack of two solenoids with 6 hoses coming off of it.


Posted on Oct 27, 2009

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SOURCE: 4X4 green inidcator light flashes and ABS light

Hi, you will probably have to take to mitsubishi dealer and have them scan diagnostics....but sounds like the o ring has busted in transfer case. will it shift in and out of 4wheel drive? If not don't drive it...it will cause alot of damage.

Posted on Aug 04, 2009

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SOURCE: My 2002 Montero Sport

Hi,

Normally points to false air/vacuum leaks and contaminated fuel

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel. Also, check the coil connections.

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on Oct 31, 2010

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http://www.obd-codes.com/p0300

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This will help.

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