Question about 1997 GMC Safari

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Po300 - 1997 GMC Safari

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Missfiring, do a tune-up please

Posted on Jan 04, 2011

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1 Answer

Innova 3030 shows a code PO300


PO300 is a random misfire code. Generally, a coil needs to be replaced. The DIM in your car should specify which one. (My 2000 S80 did). Easy to change.

Mar 17, 2015 | 2000 Volvo S80

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Jeep liberty code po300


po300 is Random/Multiple Cylinder Misfire Detected.This means the PCM sees misfires on more than one cylinder,so it's probably a fuel issue.You might have a bad fuel pump(bearings are binding,causing low fuel volume).It could be the in-tank filter is plugged up,or maybe the in-line filter.Start with the easiest-the in-line filter.

Sep 06, 2012 | 2005 Jeep Liberty

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Po300 code multi cyl misfire any sugg


The code you got may not have indicated the correct coil, that was bad

I would put the old coil back in #6 & either walk the new coil to another cylinder, or get professonal help in the form of a scan tool in Mode $06,
if applicable on your vehicle & check for misfires that why

Forget the PO300

Jul 30, 2012 | 2004 Chevrolet TrailBlazer

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Im having a p1133 po171 po300 po175 on gmc envoy 5.3L what could be the problem


Intake manifold gasket leaking.Replace the intake manifold gaskets.

Jan 21, 2012 | 2003 GMC Envoy

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Car keeps stalling and bucking slightly code appearing is po300


po300- problem code is a random misfire, it could be the spark plugs and or the wires. check coils also. good-day !!

Jul 10, 2011 | Chevrolet Impala Cars & Trucks

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I have a 1995 ,GM jimmy two codes po300,po325


po300 is multiple cylinder misfire and po325 is the knock sensor

Sep 08, 2010 | 1995 GMC Jimmy

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97 toy corolla DTC po300 po301 po401 po402


po300 random/multiple cylinder misfire detected po301 cylinder 1misfire detected po401egr flow insufficient po 402egr flow excessive

Feb 11, 2010 | 1997 Toyota Corolla

1 Answer

1996 olds cutlas supreme, 3.1 L has trouble codes PO171 and PO300. Any Ideas?


The po300 is a misfire code.This means there is probably a plug,plug wire,ignition coil,or ignition module.Check the coil towers one at a time.These are know for corroding.If you find one that is corroded then replace the plug wire also.Po171 is a lean condition code.The po300 could be causing the po171.If you have not had a tune up Now would be a good time.Hope this helps.Good luck.

Jan 06, 2010 | 1996 Oldsmobile Cutlass Supreme Coupe

1 Answer

Code po300 comes on when you drive p1133,po171


code P0300 means random cylinder misfiring, have u checked spark plugs and cables

Jul 24, 2009 | Chevrolet Blazer Cars & Trucks

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