Question about Mitsubishi Galant

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Check engine light illuminated, error code 303? I have replaced Wireset,Spark plugs, Coil is good. Not sure what is the problem. Can you please assist me? Thanks

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  • Anonymous Aug 24, 2008

    My '93' Gallant doesn't have an error code number display but I get the 'Check Engine' light too. How do I go by diagnostics?

    And my horn has seized to work even though the relay/fuse are fine. someone told me it's likely to do with the neck of the steering wheel that needs replacing. True?

    I also discovered the car didn't (doesn't?) come with a factory fitted air conditioning. Just fan. What problems should I expect on fitting one in?

  • Jonathan Dawson May 11, 2010

    What year and model is this vehicle? I need to know a little more info on what the car is doing also.(Skipping, Surging, Rinning fine, Etc.)

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  • Mitsubishi Master
  • 331 Answers

Was the code P0303 ?
if so it indicates- Cylinder 3 Misfire Detected

Posted on Aug 20, 2008

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My service engine light is flashing.the van is also running rough.1996 town and country van over 200,000 miles but maintained well


On yours, it's a misfire. Plug, wire or coil pack. Have the codes read. this will tell you where to look. 301 is 1 cylinder 303 is # 3. and so on. Pull the wire off the coil, have it close, no spark, replace the coil. Spark, do a tune up. Plugs and wires.

Jul 04, 2015 | Cars & Trucks

2 Answers

Still having problems will not run good. 1997 ford 2.0 escort;new plugs&wires coil;fuel pump still codes 0351;


From a reputable repair website:


P0351 - OBD-II Trouble Code

Auto Systems and Repair

Ignition Coil "A" Circuit Primary/Secondary Malfunction Our emissions expert has put together the following information about the P0351 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.
OBD II Fault Code
  • OBD II P0351 Ignition Coil "A" Circuit Primary/Secondary Malfunction
What does this mean? The ignition coil or coils are responsible for igniting the air/fuel mixture inside the combustion chambers. Without reliable performance from the ignition coil(s) the vehicle will stumble and misfire.
Code P0351 indicates there's an electrical problem in either the primary ( the computer side ) or the secondary ( the spark plug side ) of the Ignition Coil "A" Circuit.
Symptoms
  • Check Engine Light will illuminate
  • Engine idles rough
  • Engine misfires on acceleration
  • In rare cases, the engine may not exhibit noticeable symptoms
Common Problems That Trigger the P0351 Code
  • Defective Ignition Coil(s)
  • Defective Spark Plug(s)
  • Intake Manifold Vacuum leaks
  • Carbon buildup in the Throttle Body air passages
  • Defective Idle Air Control Valve or Electronic Body
Common Misdiagnosis
  • Ignition coil(s) replaced when cause of the malfunction was a vacuum leak
  • Spark Plugs replaced when cause of the malfunction was a vacuum leak

Dec 21, 2014 | Ford Cars & Trucks

2 Answers

Codes 303, 336, and 1870


Engine misfire code probaly have a coil or plug wire going bad

Feb 24, 2014 | Cars & Trucks

1 Answer

Error code p0420 and p0303


Code 303 is a miss or lack of power on cylinder 3. If you know for a fact that cylinder is getting spark it could be an injector problem.
Code 420 means the catalytic converter is not performing up to standard which could be several things including the miss on cyl 3.

Jan 30, 2014 | 2005 Chevrolet Trailblazer Ext

2 Answers

I have a 2007 Chrysler Sebring with a 2.4 engine. The check engine light came on and the car runs rough. Had the code checked and it came back with a 303, 302 and 300 codes. What is the most common...


Hello Frybird.

The codes you have are engine misfires.
Code 300 is random misfire (could be any cylinder).
Code 302 is cylinder #2 misfire and 303 cylinder 3 misfire.

Most common causes are ignition issues.
Spark plugs, ignition wires/boots and ignition coils.

Next would be fuel issues such as fuel injectors.
Next would be emission components such as EGR valves.
Then in a worst case condition would be engine wear parts (valves, camshafts etc.)

The place to begin is ignition as this is a common failure on most cars.

If you need further assistance regarding your question please ask me here in a comment.
Thank you for using FixYa.

KL

Feb 11, 2011 | Chrysler Sebring Cars & Trucks

1 Answer

99 cavalier ETS OFF warning light and check engine light come on randomly. car seems to sputter when accelerating and idles rough. recently replaced fuel filter, plugs and wireset, valve cover gasket


Get the codes checked.This will tell you what cylinder is causing the problem.If the wires and plugs didn`t help then you probably have a bad coil.Hope this helps.Good luck.

Mar 23, 2010 | 1999 Chevrolet Cavalier

2 Answers

1996 disco 1 misfire error codes 313 and 316, bank B.


Could be, but more likely to be fuel. Why do I think that? Carbon build up typically happens when plugs are working (no carbon without fire) but fuel mixture is wrong (air or fuel). If coil, most likely would misfire at all engine RPM, not just low RPM. So, I reckon to look at fuel rail pressure to the injectors first - get a pressure gauge on the fuel rail and check it out. I think, but can't remember for sure, that there is a fuel pressure regulator per bank, but I could be completely wrong. But either way, I'd check that out as it is simple and if it is OK, then check out air path to that bank and any vacuum/air take offs specifically to that bank. If all OK, then why not swap coils? See if problem swaps over. If so, you know it is the coil.

Jul 28, 2009 | 1998 Land Rover Discovery

1 Answer

Engin managment system light keeps coming on and off, the car drives ok, but i could say its shivering or shaking one it is stand still, the enngin has movement, is it the coil? or something more?


The best ideea is to scan your Engine Control Unit with a VAG-COM, Bosch KTS, ... diagnosis tool. If you have one of these dedicated scan tools you will find definitely the engine fault code-"P...." and the clear description of the error. Also you can try to erase this error (or these errors) from the Engine Control Unit memory. If errors are "sporadic" type you certain have permission to erase them, also for some kinds of "static" errors. Because your Engine "MIL" - Malfunction Indicator Lamp keeps coming "ON" and "OFF" you have a big good hand to clean errors from Engine Management System memory. If you don't have any diagnosis tool, you can also try something else. For check up if the engine have a proper turn, you can successively disconnect each spark plug coil from the engine wiring system, engine idle, car stationary. When you operating this you must be free of chassis ground (battery ground)!!! When you disconnect a spark plug coil and the engine speed (rpm) drops, that means this coil works properly. When one coil disconnected and engine speed (rpm) still remain unaltered, this coil (or spark plug) is out of order. First you can change only the spark plug and check up again. If no changes the coil is defective and must be replaced! My recommendation is first to change all spark plugs on the engine, and after that check up coils. Please Rate my Response! Thanks!

Jun 13, 2009 | 2000 Audi A4

2 Answers

2003 pt cruiser has 3 errors they are 440,441 and 303. please help


440 and 441 relate to the evaporative prurge flow system and 303 is a misfire detectec in cylinder 3.

May 07, 2009 | 2004 Chrysler PT Cruiser

5 Answers

My 1995 Dodge Intrepid jerks and bucks when you drive it. When you let off the gas it drives fine. We have changed the fuel pump and fuel filter. It is still doing it. What could it possibly be?


Finally, fixed the problem. After testing the car with the fuel pressure gage, I found out that the car had proper pressure 46 with regulator and 55 without. After that tested all the voltages on the sensors. They checked fine so I disconnected the spark plugs while running (be careful not to get shocked, it happened to me a couple of times). Found that plug 3 and 6 not getting spark. So i checked the coil. With the car still running I pulled off the wireset at the coil one by one. All checked good except plug 3. That told me that I was not getting any spark from the coil for spark plug 3. I decided to change the coil. However. I also decided to change the wireset because plug 6 wasn't sparking at the plug. After changing coil and wireset, the car is running like a champ. Wish I would have checked it in the first place. It would have save me about $500. I changed out the fuel pump $300. I bought a new fuel filter $10.00. I bought 2 new O2 sensors $100.00 and also I bought a new fuel pressure gage $50.00. Lastly, new coil and wireset $90.00. The car is running like new now. I think better than we we first recieved it. At least I know the fuel pump, O2 sensors are good and now I have a new tool (looking at the positive side). Plus the car is finally fix and running great!!

Jul 22, 2008 | 1997 Dodge Intrepid

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