Question about 2000 Nissan Altima
If your DTC code is correct, P0300 means: Random/Multiple Cylinder Misfire Detected.
As you have not indicated any codes from 301 - 306, then the computer has not been able to identify which cylinder misfired.
Therefore, you will need to begin checking for possibilities which could trigger the random (or multiple) misfire, which can be anything from:
- air leaks (this can disrupt readings on the engine's computer). Try spaying liquid around the inlet manifolds, check hoses etc for leaks.
- Bad coil (assuming engine has a coilpack)
- Bad or poor spark plugs
- Bad or poor condition HT leads (going to the spark plugs)
- Bad cylinder compression (compression test will confirm this)
- Leaking head gasket (this can also cause bad cylinder compression) - are you losing coolant from your cooling system?
These are just some possibilities...
Posted on Nov 12, 2009
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Posted on Jan 02, 2017
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