P0300 NISSAN - Cylinder Misfire Detected Random Cylinders
P0300 NISSAN Causes
Faulty spark plug (s)
Faulty ignition coil (s)
Clogged or faulty fuel injector (s)
Intake air leak
Fuel injectors harness is open or shorted
Fuel Injectors circuit poor electrical connection
Ignition coils harness is open or shorted
Ignition coils circuit poor electrical connection
Insufficient cylinders compression
Incorrect fuel pressure
P0300 NISSAN Notes
The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"
Cost of diagnosing the P0300 NISSAN code
The cost of diagnosing the P0300 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
P0300 NISSAN Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
Lack/loss of power
P0300 NISSAN Description
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP
) sensor signal to vary, the Engine Control Module (ECM
) can determine that a misfire is occurring.