Question about 2000 Pontiac Bonneville

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2000 bonneville 3.8 non turbo ran a dia and code PO300 came up what is the problem

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  • indycj001 Sep 26, 2008

    po300 code terrible vibration and bad spark knock help

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Help, 2000 bonneville random misfires too. Changed spark plugs and wires, all new ignition coils and control modular still no improvement.

Posted on Oct 24, 2008

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P0300 is a random misfire code, if you are not mechanically inclined the first thing i would do if you havent done so in the past year or more, is change the plugs and wires, a random misfire code can be caused by worn plugs and/or wires not firing properly. let me know if that fixes it.

Posted on Jul 13, 2008

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1998 pontiac bonneville ssei I changed plugs wires and coils. But it still comes up with a po300 code. What have I missed???


some codes need more than the reader to reset them like the ones at the repair shop some times after market coils will continue to give a bad reading

Mar 22, 2015 | Pontiac Cars & Trucks

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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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When i checked the # 3 and # 6 injector they were not working, i replaced both with used injectors and now the #5 and #6 are not working?


what about the ignition coil or crankshaft sensor. with h.e.i spark tester you will find the defect coil

hope it helps

Oct 05, 2014 | 2000 Pontiac Bonneville

2 Answers

How do i fix code PO300 on my 2000 Nissan Altima


That's a multiple / random misfire. Lot's of ways to go on this.. bad plug, wire, coil pack, etc. Then there's this one:
fixed my PO300 code MY350Z COM Forums

May 23, 2014 | 2000 Nissan Altima

1 Answer

Diagnostic codes


Is this a turbo or non turbo?

Mar 29, 2014 | 2000 Volvo S70

1 Answer

My 2000 has codes po171 po300 po 463 po480 what


P0171 =system too lean (bank 1)
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P0463 = fuel level sensor circuit high input
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Aug 16, 2013 | 2000 Oldsmobile Silhouette

1 Answer

Looking for torque specs and sequence of both intake manifold and plastic plenum on 98 pontiac bonneville 3.8 non turbo


Lower intake bolts 11 ft. lbs start in the center of the intake and work your way out cross from side to side.Tighten the upper intake bolts with the same procedure with 89 inch pds.Be sure to apply threadlocker to the lower intake bolt threads.

Feb 07, 2010 | 1998 Pontiac Bonneville

2 Answers

CODES P0300 P0303


These codes are codes regarding failure. The code P0300 means repeated Engine Misfiring. The code P0303 means Repeated Misfiring of Cylinder Number 3. Kindly contact a technician to get both checked. Their Heads must have been misplaced or broken due to misfiring.
Thank you sir, Have a nice day.

Sep 26, 2009 | 2002 Dodge Neon

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