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Code po300 and po327 on a 2003 suburban what do these mean

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Goto engine-codes.com there is info on them lots of it and how and what to check the po300 is a random miss fire can be spark plugs coil fuel injector air leak and more it tells you what to ;look for ect. ok good luck

Posted on Nov 22, 2014

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2001 grand Cherokee. Code P0300


po300 is a random misfire, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why. If it was a po302 this means its #2 cylinder thats misfiring,ETC, But po300 could be any one of the cylinders. check plugs, wires, fuel injectors, Etc. Good-Day!

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97 suburban runs rough, codes po141,po157,po300,po155


Well, code 141 is for a problem with the heater circuit for O2 sensor bank one sensor two which is after the catalytic converter.
Code 157 is for the same issue but with bank two sensor two, and 155 is for bank two sensor one. I would look at the wiring for those O2 sensors first. It is very rare for more than one O2 sensor to fail at any given time.
Code 300 is for a random miss which may be tough to track down.

Feb 06, 2014 | Chevrolet Cars & Trucks

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Engine runs erratic code po300 And. Code boo29 want to find out how to repair


it sounds like you may have a chunk of carbon in the egr valve does the power brakes seem hard to brake if so remove egr valve and clean out carbon if you do not see any carbon holding the valve open they also had a problem with the valve guides gumming up and the valves sticking but that usually only sets a code p0300 under load

Aug 17, 2013 | 2001 Chevrolet Suburban

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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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2005 Chrysler 300 codes po300 and po123


The P0123 means Throttle/Pedal Position Sensor/Switch A Circuit High Input.
The P0300 means Random/Multiple Cylinder Misfire Detected
Clear the code with OBD2 code scanner. If it comes back on, you
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Aug 22, 2012 | 2005 Chrysler 300

1 Answer

I have a 300 code on a 1999 subburan what can it be?


CODE PO300 IS ENGINE MISFIRE DETECTED CONDITIONS.POSSIBLE CAUSES COULD BE LOW COMPRESSION CYLINDERS OR VACUUM LEAKS AT INTAKE MANIFOLD. .BAD OR DIRTY FUEL INJECTORS.BAD PLUGS AND WIRES AND COILS.EGR VALVE STUCK OPEN ALSO PVC VALVE STUCK OPEN OR LEAKING VACUUM HOSE.EVAP CANISTER COULD BE FUEL SATURATED.

Jun 11, 2010 | 1999 Chevrolet Suburban

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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

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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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Service engine light blinks,code read out of po300


Code p0300 is the code for "random missfire detected". The "check engine" light is flashing to warn you that severe damage is being done to the catalytic converter.(very expensive)..

Apr 27, 2009 | Chevrolet Tahoe Cars & Trucks

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