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2005 saturn ion 3 trouble code P0300

Check engine light came on with trouble code P0300. Replaced ignition control module, coils, spark plugs. Check engine light came on again with same P0300 code again.

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  • Anonymous Mar 14, 2014

    p0300

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  • Cars & Trucks Master
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A P0300 code indicates random, multiple misfires were detected. You eliminated the possibility of ignition system faults by replacing the ignition module, the coils, and the spark plugs (unless the replacement part(s) were no good). However you did not mention the ignition wires which are another probable cause. In addition, there could be vacuum leaks due to damaged hoses or improper routing. Consider also fuel contamination or a problem with the fuel system.

Posted on Dec 24, 2013

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Posted on Jan 02, 2017

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RJones1125

Rick Jones

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SOURCE: 91 mazda 626dx 2.2liter shuts off while driving

sounds like the fuel pump relay

Posted on Feb 23, 2009

daves944

Dave C

  • 1050 Answers

SOURCE: 1991 honda accord "no spark"

There is a relay mounted way up under the dash on the driver side. It is about 1"x1"x2" and it says Mitsuba on it. This is the PGMFI relay, sometimes called the main relay or fuel injection relay. It is very likely the problem. You can buy another one, or there was a bulletin on how to repair it. You need to take it out, pop the cover off, and resolder the cracked solder joints on the pc board that the relays are mounted on. Really not that hard if you have a little soldering experience. If not, just buy another one, about 50 bucks.cb28323.jpg

Posted on Mar 26, 2009

Anonymous

  • 14 Answers

SOURCE: my check engine light on my 07 saturn ion keeps

1174 is a lean code, and would have to been set first because it will not set when the 0300 is there. 0300 is a random misfire, because it read after the lean code, it was probably caused by the lean condition. 1st check for vacuum leaks from hoses or intake gaskets, you cal listen for a hissing sound, or spray carb cleaner around intake systems, a change in rpm will be noticed when spraying near a vac leak. other probable causes are the upstream 02 sensor, map sensor, or fuel delivery problems. does the vehicle idle porly, or does it miss at the top end?

Posted on Dec 20, 2009

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2006 grand prix gxp 5.3. When you are driving normally it will miss from 50mph and up. When you punch it it doesn't miss a beat. I cleaned the maf sensor and air filter, Plugs were replaced.


It's probably a coil breaking down , have a scan tool hooked up an have misfires checked to see which cylinder is missing .
Ignition Coils
Each ignition coil has an ignition 1 voltage feed and a ground. The engine control module (ECM) supplies a low reference and an ignition control (IC) circuit. Each ignition coil contains a solid state driver module. The ECM will command the IC circuit ON, this allows the current to flow through the primary coil windings for the appropriate time or dwell. When the ECM commands the IC circuit OFF, this will interrupt current flow through the primary coil windings. The magnetic field created by the primary coil windings will collapse across the secondary coil windings, which induces a high voltage across the spark plug electrodes. The coils are current limited to prevent overloading if the IC current is held high too long. The spark plugs are connected to their respective coils by a short secondary wire. The spark plugs are tipped with iridium for long life and efficiency.
Drive it long enough like that (with it misfiring ) the check engine light will flash . This is to warn that a catalytic converter damaging event is taking place . This would also set a DTC - diagnostic trouble code
DTC Descriptors ?€¢
DTC P0300 Engine Misfire Detected


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DTC P0301 Cylinder 1 Misfire Detected


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DTC P0302 Cylinder 2 Misfire Detected


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DTC P0303 Cylinder 3 Misfire Detected


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DTC P0304 Cylinder 4 Misfire Detected


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DTC P0305 Cylinder 5 Misfire Detected


?€¢
DTC P0306 Cylinder 6 Misfire Detected


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DTC P0307 Cylinder 7 Misfire Detected


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DTC P0308 Cylinder 8 Misfire Detected

Apr 26, 2016 | Cars & Trucks

1 Answer

I have a 2005 Nissan Sentra 1.8L Special Edition and I'm having trouble starting the car. The check engine light came up and got a troubled code P0300. I have recently changed the spark plug, MAF sensor...


DTC P0300: Random multiple misfire detected. Probable cause:
1, Vacuum leaks. Damaged hoses or incorrect routing
2. Fuel contamination
3. Ignition system problem. Check ignition module, coil, spark plugs and wires
4. Fuel system problem

Oct 07, 2014 | Cars & Trucks

2 Answers

2008 Cadillac CTS returning P0303 after replacing spark plug and coil pack


Error Code: P0303
Description:
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression, cylinder No.3. (check valve clearance and throttle plate for excessive wear)
Engine control module (ECM).

Feb 27, 2014 | 2008 Cadillac Cts

1 Answer

Random multiple misfire P0300, P0302, P0304 on 2006 Kia Rio


A competent mechanic will check all probable causes associated with these DTC codes.
Code P0300: Random-Multiple misfire detected. Probable causes:
1. Vacuum leaks, damaged hoses, or improper routing
2. Fuel contamination
3. Ignition system - Ignition module, coil, spark plugs and wires
4. Fuel system
Code P0302: Cylinder 2 misfire detected. Probable causes:
1. Control unit software in need of updating
2. Faulty PCM or ECM
3. Faulty fuel injector
4. Ignition system
5. Fuel system
Code 0304: Cylinder 4 misfire detected. Probable causes:
1. Control unit software in need of updating
2. Faulty PCM or ECM
3. Faulty fuel injector
4. Ignition system
5. Fuel system

Be sure the invoice enumerates all of these probable causes as having been checked. Also, some of the replacement parts installed earlier may be faulty.

Jan 19, 2014 | Kia Cars & Trucks

1 Answer

P0300 trouble code


Did you replace the wires? What kind of car?

Dec 24, 2013 | Cars & Trucks

2 Answers

My 2003 impala check engine light is blinking when i go above 30 miles


Hello and welcome, when the check engine light flashes, this means a engine miss that can cause damage to the cat. converter if you keep driving, you will need to have the system scanned for trouble codes, probably has a code P0300. a engine miss can be caused by spark plugs, plug wires, ignition coils, injectors or even a internal engine problem

Apr 05, 2011 | 2003 Chevrolet Impala

2 Answers

Got a little miss and check engine light is on


Sound like you need a minor ignition tune-up. I will take an educated guess and say that if you were to have the codes read from the ECM (engine control module) they would be P0300 to P0306 which would mean you have an engine misfire. You can go to one of your local consumer automotive parts houses and have the codes read for no charge (because they want to sell you some parts) and go from there. Sounds like a set of ignition plugs and ignition wires may fix your problem. Pay close attention to the firing order of the ignition wires before you remove them if you do it yourself. Firing order on top of ignition coil pack. Good luck

Apr 28, 2010 | 2001 Ford Taurus

2 Answers

My 02 olds Alero is idling rough, has lost power, and is hesitating on acceleration just since this this morning. What might this be? Thinking coil pack? At first was thinking vacuum leak put can't hear...


It may just be time for spark plugs for all we know. Not knowing the history thats where I'd begin, Then injectors and maybe a coil if were guessing. Now if you dont want to guess get it diagnosed properly.

Apr 13, 2010 | 2002 Oldsmobile Alero

2 Answers

Code p0300 replaced coil spark plugs and coil cover 2000 2.4 cavalier rpm up and down while ideling


The code is a mis-fire code. This code does not tell you which cylinder is mis-firing.
Here is a list of other items to check :

- O2 sensor
- Catalytic converter
- EGR valve
- Cam sensor
- Bad computer

Please let me know what you find.

Feb 07, 2010 | 1996 Chevrolet Cavalier

2 Answers

I have a 1999 VW Passat 1.8l turbo. It has codes P0300 and others


They may not be firing. I would check spark from coils. You may have a bad coil pack. Do check for any vacuum lines. You can go to autzone.com and register for full free online repair manual

Sep 23, 2009 | 1999 Volkswagen Passat

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