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I have a 2003 Chevy Suburban that has a error code P0300. What will cause this multiple misfire?

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Posted on Apr 18, 2017


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P0131 code and p0300 code on 1997 chevy venture

code p0131 refers to heated oxygen sensor (HO2S) bank 1 low voltage. possible causes ---Exhaust leak wiring short to ground HO2S ans ecm I would check the wires are not touching the exhaust then replace the sensor with a genuine one as the settings may be different on an after market one giving a false code
.Code p0300 refers to random / multiple cylinder/s --- misfire detected. Possible causes include Spark plug/s--- HT leads---injectors--- ignition coils----low compression and wiring

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1 Answer


Im assuming your asking about the ODB-II codes, this code,P0300 Random/Multiple Cylinder Misfire Detected.
A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.
Here are a few things that could be the cause.
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer

    I would start things out with a tune up, new plugs and wires, wires break down after time and could be grounding out, or arcing between themselves causing a misfire.
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    This is on 2.2L------ on te code P0171 = Oxygen Sensor...
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    I got several error codes on my 07 Toyota Avalon, codes P0352,P0300 and P0301-P0306. Does any one one know what could be causing it or how to repair it.

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    cylinder no.1 misfire detected
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    2003 1500hd chevy silverado 6.0 liter. I had a

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