Question about 2001 Volvo S60

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P0300 code The car sputers gets worse when it warms up

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You will have to check for cylinder misfire
codes or just work on that issue
The PO300 if you google it ,is of no use to you
Could be a bad ignition coil or several coils, vacuum leak,
or many other things.

Posted on Jul 22, 2013


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Posted on Jan 02, 2017


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06 dakota 4.7. P0300 replaced plugs,injectors,coils,o2 sensors & all other sensors,intake cleaned.bad ecm? cats show same temp both sides of cat, bad cat? Or??

Have you checked for vacuum leaks? Poor idling when cold that gets better when the engine warms up, or at higher RPMs are symptoms of vacuum leaks. Check all hoses and connectors. If it's a manifold gasket, you will want to use a smoke machine (check when the engine is cold).

Apr 03, 2017 | Dodge Dakota Cars & Trucks

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I have a 97 deville concours with northstar that keeps giving me a P0300 code and SES light?

cars seldom idle rough when warming up if the injectors and electronics are in good condition
P0300 refers to random misfires which is the rough idle when warming up
the history in the fault codes is the fault report generated but not maintained as the fault rectifies itself
the ses is probably telling you to service the system--clean the injectors , fuel filter or check fuel pressure

Jan 05, 2017 | Cars & Trucks

1 Answer

2001 mercury villager runs ok when cold the warmer it gets the worse it misses the codes it give me are po300 po180 po325 not sure what problem is just started this few days ago

code p0300 refers to random misfires---misfires detected==causes ---spark plug/s --HT lead/s ---injector/s---ignition coil/s---low compression---ECM
code p 0180 refers to fuel temperature sensor A --circuit malfunction === causes ---wiring---fuel temp sensor---ECM
code p 0325 refers to knock sensor (KS) 1 bank 1-- circuit malfunction===causes ---wiring---poor connection---KS
as the codes vary to much and are not related , the first thing I would do is to replace the ECM with a known good unit to eliminate a component failure when it gets hot
after that check wiring for injectors and fuel pump
a lot of misfires can be traced to low fuel pressure and in this case, it could be from a fuel pump failing to produce sufficient pressure when it warms up( shorting out internally)
why I suggest the ECM in the first place is the code for the knock sensor which has little to no relevance to the others and could indicate a ECM problem

Apr 13, 2016 | 2001 Mercury Villager

1 Answer

Car will start after cranking but spits and sputers then stops, car jerks on highway.

This could be hundreds of possible issues, so think back--did this start long ago and gradually get worse? Could be either ignition or fuel issue. Test fuel pressure. Test ignition module.

Feb 20, 2016 | Cars & Trucks

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

How To Fix P0300 random misfire codes in your car ...

? 2:56
Feb 5, 2010 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years and counting, shows how to fix your car if the check engine light ...

P0300 - OBD-II Trouble Code - RepairPal > Encyclopedia > OBD II Codes
OBD II Fault Code. OBD II P0300. Fault Code Definition. Random, Multiple MisfireDetected. Symptoms. Check Engine Light flashing; Rough running, hesitation ...

P0300 - Check Engine Light Diagnostic Trouble Code ...
The misfire detection monitor, a software strategy built into the computer, is designed to detect an engine misfire. The computer can also normally identify the ...

Random-Misfire Page

Jan 24, 2016 | Cars & Trucks

1 Answer

Truck sputers when starting when truck plug in does not sputers

its because its cold with it plugged in it stops because it keeps the block warm which helps with the cold starting

Jan 11, 2014 | 1997 GMC Sierra

1 Answer

2003 300m runs rich new 02 sensors and cat converters cam sensor ?

What is the code ?
Have you checked the fuel pressure regulator ? Is the air filter and intake hose clear ? Is the engine warming up ?

Aug 03, 2012 | Chrysler 300M Cars & Trucks

1 Answer

I have a 1999 Chevy Astro that is giving me a P0300 trouble code. So far I've replaced the plugs, wires, cap, rotor, coil, fuel filter, air filter, and catalytic converter. I'm still having the...

P0300 Diagnostic Code - Random Misfire
Technical description:--
Random/Multiple Cylinder Misfire Detected:---
Exactly what does this code means:--
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.
the engine may be harder to start.the engine may stumble / stumble, and/or hesitate.
other symptoms may also be present…There may be rough idle, sputters and stallsand jerks.
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 for this error problem:--
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 vehicle, 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 un-metered air getting past the airflow sensor, or an EGR valve that is stuck open.

Aug 26, 2010 | 1999 Chevrolet Astro

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