Question about 2000 Buick LeSabre

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Code is po300 multiple cylinder misfire. intermittent..

What should i be looking for??

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  • mcg374 Jun 20, 2009

    I have already changed plugs and wires, intake gaskets last year and corrosion on one wire going into coil. It only misfires once in a while..

  • mcg374 Jun 20, 2009

    I changed the intake gaskets last year, the plugs and wires last month.

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Vacuum leaks, plugs, check the wires for corrosion on the coil packs, the 3800's are known for corroded contacts there, also a common problem is the intake gasket leaking near the egr valve, check to see if it is wet around where the egr valve enters the intake manifold, check for fuel pressure, and make sure all the sensors and vac lines are plugged in properly

Posted on Jun 20, 2009

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That points to a Misfire in your engine try changing the number 3 Coil, spark plugs & leads and it should fix the problem.

Posted on Jun 20, 2009

  • Nathan Jun 20, 2009

    If you changed them last year then the problem may have occured between then and now so i would change them again to eliminate problem (coil, plugs ands leads)

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1 Answer

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P0300 Random/Multiple Cylinder Misfire Detected P0301 Cylinder 1 Misfire Detected P0302 Cylinder 2 Misfire Detected P0303 Cylinder 3 Misfire Detected P0304 Cylinder 4 Misfire Detected P0305 Cylinder 5 Misfire Detected P0306 Cylinder 6 Misfire Detected P0307 Cylinder 7 Misfire Detected P0308 Cylinder 8 Misfire Detected P0309 Cylinder 9 Misfire Detected P0310 Cylinder 10 Misfire Detected P0311 Cylinder 11 Misfire Detected P0312 Cylinder 12 Misfire Detected P0313 Misfire Detected with Low Fuel P0314 Single Cylinder Misfire (Cylinder not Specified) P0315 Crankshaft Position System Variation Not Learned P0316 Misfire Detected On Startup (First 1000 Revolutions)

Read more at: http://www.obd-codes.com/trouble_codes/
Copyright © OBD-Codes.com
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P2195 O2 Sensor Signal Stuck Lean Bank1 Sensor 1 P2196 O2 Sensor Signal Stuck Rich Bank1 Sensor 1 P2197 O2 Sensor Signal Stuck Lean Bank2 Sensor 1 P2198 O2 Sensor Signal Stuck Rich Bank2 Sensor 1

Read more at: http://www.obd-codes.com/trouble_codes/
Copyright © OBD-Codes.com http://www.obd-codes.com/p0002

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