Engine-Codes
 
OBDII Code List
 
P0300 2012 NISSAN ALTIMA SEDAN

P0300 2012 NISSAN ALTIMA SEDAN - Cylinder Misfire Detected Random Cylinders

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

P0300 2012 Nissan Altima Sedan Possible 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 2012 Nissan Altima Sedan Tech 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"

When is the code detected?

The control module monitors the crankshaft speed and has detected a misfire condition

P0300 2012 Nissan Altima Sedan Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/loss of power
  • Hard start
  • Engine hesitation

P0300 2012 Nissan Altima Sedan Meaning

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.
OBDII Code P0300 2012 Nissan Altima Sedan - Cylinder Misfire Detected Random Cylinders - Engine-Codes.com

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