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Greg, import technician
Category: Nissan
Satisfied Customers: 7124
Experience:  import Technician . Shop Owner ,. 27 years experience,
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How do you fix a 03 neasan xterra with a code p0300

Customer Question

how do you fix a 03 neasan xterra with a code p0300
Submitted: 1 year ago.
Category: Nissan
Expert:  Greg replied 1 year ago.

Hi .

Normally if you only have a P0300 and no other codes i tend to find the problem is normally fuel related .

Fuel pressure , as this defines a misfire that is jumping around randomly .

If you don't have any.

drivability issue check the fuel pressure .

Exhaust back pressure seen bad catalytic converters cause this issue also .

Bad EGR valves .

Faulty cam / crank sensor . in some case no codes .

Vacuum leaks .do a manifold vacuum test .

Check the above and if all checks out good then please get back to me for further assistance if needed.

Kind regards Greg