Question about 2005 Kia Rio

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Flashing light. Been diagnosed with codes PO300, PO301 and PO304

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  • Angela Div Nov 08, 2012

    is there an upgrade for kia's dealing with this issue?

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No, They are all a miss fire code, That usually has to do with the spark plugs end wires, end depending on the miles on the car end the age, They are class as a regler mantenance item on the car,It just like with oil changes,

Posted on Nov 08, 2012

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Posted on Jan 02, 2017

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SOURCE: i got coes po604, po303, po300, and po301 for my

miss fire codes need to check tune-up, proper spark at all cylinders

Posted on Oct 15, 2009

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2003 acura tl error codes po301 po302 po304 po306 p1399 po300


PO300 and P1399 are random cylinder misfire detected.
PO301 cylinder 1 misfire
PO302 cylinder 2 misfire
PO304 cylinder 4 misfire
PO306 cylinder 6 misfire
I would say that you have damage to the ignition wiring harness or you ECM is failing.

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2001 windstar im getting codes po172 po174 po301 po302 po 303 po304 po300 installed new coil pack twice new wires,plugs,cam and crank sensors,fuel andair filters,pcv valve and now get these codes. ...


Get your ECM replaced. Usually it's next to battery or inside front fenders. The rain must have shorted out connections and fried ECM. Engine will sputter until it is done. Usually autozone, advance auto, or dealer has ECM.

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I have a 1996 crown vic i need to know these trouble codes po301 po304


PO300 Codes-- are cylinder misfires

PO301 thru PO308

Last # is the cylinder

Could be bad ignition coil for a cylinder
or a coil pack for that side,depending what
engine you have

#1 &#4 are at the front & back of the passenger
side of your motor or firewall side if transverse

You will need to provide details of who worked on it
& exactly what was done besides replace a coil based
on a code

Codes aren't very good with COP Ignition but a complete
coil pack on one side should take care of some issue

Vacuum Leaks & other items can cause misfires & the codes
don't tell you to replace ignition parts as you may have

Feb 14, 2013 | 1996 Ford Crown Victoria

1 Answer

My 2002 VW Passet is diagnosing a PO155, PO300, PO301,PO304 & PO305


The 300 codes are misfire codes, do a tune up and that should fix the problem. the 155 i will have to investigate and try to see what it is.

Apr 10, 2011 | 2002 Volkswagen Passat

2 Answers

Hello i have a GTI its a 2.0L manual transmission, i have been having problem after problem thus far. Current engine codes PO422, PO300,PO304,PO303,PO302. I do not have a code list to see what these are...


I think that PO422 is the Cat Converter, it may be bad or may be just the O2 sensor.
The PO300, 302, 303, 304 code have to do with the ignition coils or wires. (302, 303, 304 means there are ignition /firing problems in cylinders 2, 3and 4). If your lucky just the wire and new spark plugs.
Google "engine codes Jetta" for more on web. Good luck.

Feb 06, 2011 | Volkswagen GTI Cars & Trucks

1 Answer

1999 chevey blazer code 0300, 0131


PO300 AND PO301 AND ENGINE MISFIRE CODES FOR #1 CYLINDER I HAVE A 96 BLAZER I GOT PO304 WITCH IS #4 CYLINDER IT TURNED OUT TO BE THE FUEL PUMP WASN;T SUPPLYING ENOUGH FUEL I REPLACED IT FIXED THE PROBLEM BUT ITS KNOT CHEAP TRY REPLACING FUEL FILTER LOCATED UNDER DRIVERS DOOR MOUNTED ON FRAME GOOD LUCK YOU REALLY DON;T WANT TO SCREW WITH THE FUEL TANK AND LINES ON THIS VEHICLE

Oct 10, 2010 | Chevrolet Blazer Cars & Trucks

1 Answer

Codigo P1300


The code that is of main concern is the PO300 it indicates random multiple engine misfires, normally there are other codes such as PO301/PO304 etc which indicate what cylinders are misfiring, this engine does not have a distributor, it uses individual coil packs, one per two cylinders, these coil packs cause the problem, usually it is only one out of the three.
They are located under the black cover

you would have to try switching the coils around to different cylinders

Apr 04, 2010 | 1993 Toyota Camry V6

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