Q: P300 reading, loss of power, and misfiring cylinder

asked by on

I have a P300 reading, loss of power, and a misfiring cylinder.

Code P0300 indicates there is a random misfire which can be happening in one or more of the cylinders in your Nissan. If you have a specific cylinder misfiring there is usually another code along with the random misfire code, to indicate which cylinder needs investigation. P0301 would indicate a misfire in cylinder number one, P0302 a misfire in cylinder number two and so on. Your Pathfinder also uses a coil on plug ignition system, which means each individual cylinder has its own ignition coil that provides spark to that particular cylinders spark plug. It is possible your Pathfinder will just need its’ spark plugs replaced, however there may also be issues with one or more of the ignition coils as well. To determine exactly what’s going on with your Nissan, I recommend having a certified mechanic examine the vehicle in person to give a proper diagnosis of your car’s misfiring issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. P300 reading, loss of power, and misfiring cylinder

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Airbag light is on

Hi there. An airbag light is an indication there are fault code(s) present, I suggest having a certified mechanic, like one from Yourmechanic, scan your vehicle for airbag codes.

Q: Do all xtronic transmissions have a shudder when accelerating

The transmission shudder is very common of a problem but is not normal and the transmission control module may be in need of reprogramming as per a technical bulletin NTB15-014B dated 4/5/2016. This is a recent TSB and may not...

Q: Ignition tumbler and switch not working correctly

Hello there, many faults will cause the power to not come on the key is turned in your 1994 Jeep Cherokee. You did well in replacing the ignition switch first as the symptoms you have described sound like the ignition...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...