Q: The code reader for my engine light says P0306P. What does the second P mean?

asked by on June 12, 2017

The code reader for my engine light says P0306P. What does the second P mean?
My car has an automatic transmission.

The P means powertrain. The second P is not normal and may just be the scanner you are using. This vehicle does not use the second letter P. I would disregard it. As far as the P0306 it indicates a misfire in cylinder number 6.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Not too happy with having a hybrid that stalls
The problem to your intermittent stalling can be caused by the electrical water pump wiring shorting out the coil wires, causing the engine to stall and may or may not blow fuses. The repair is now covered under a recall...
Where are the grocery hooks located and how do you use them?
Ever go to the grocery store, load up your trunk, arrive home and find that your bags have spilled and your food is now all over the place? Your car has grocery hooks to help prevent this from happening. They’re...
Brake lights not working.
The first and easiest thing to check would be the fuse. If that's ok, check to see if the switch on the brake pedal itself hasn't fallen off. If that doesn't solve your problem, I recommend having a mechanic, such...
What does the door ajar Warning Light mean?
The door ajar Warning Light is located on the instrument panel. This light illuminates when one of the vehicle’s doors is not properly closed. Securely close all doors, and the light will turn off.
Car makes scraping sound and rattles
Hi there, thanks for writing in about your 2001 BMW 740iL. It sounds like you have more than one problem here, and the scraping noise can be something dragging or rubbing and can only be checked and diagnosed in person....
Front coil spring housing corroded and broke away
Hey there, thanks for writing in about your 1997 Mercedes-Benz E300. This is also related to your other question regarding the coil springs. As explained, the perch is a structure that supports the coil springs. Often times, when one or...
Turns over really slow then fires up and starts and around 70 MPh rpms jump up and it shifts into an almost 1/2 neutral 1/2 drive
Hello. From what you describe it would appear that your vehicle is experiencing more than one issue. In regards to your starting issue, slow cranking is usually caused by a bad battery (https://www.yourmechanic.com/services/battery-replacement) or starter (https://www.yourmechanic.com/services/starter-replacement). I would start by...
I think I accidentally put diesel fuel in my 2015 Nissan Altima.
Hi there. Yes, it is possible to put diesel into any vehicle as not all nozzles are differentiated. If this has happened, it's not all bad, but not all good. The bad news is that all the fuel will need...
Loud knocking/tapping from driver side of engine.
It would be difficult to determine the exact cause of this issue without physically inspecting the vehicle. However, I can recommend that if it is possible for you, I would replace the engine with another new or rebuilt engine and...

Related articles

2012 Ford Fusion vs. 2012 Toyota Camry: Which Should I Buy?
While most people believe that domestic sedans just cannot compete with the Honda Accord and the Toyota Camry, the industry leaders, that is not necessarily true. Yes, there are some metrics where the Camry just excels, however the Ford Fusion...
2012 Toyota Tundra vs. 2012 Chevrolet Silverado: Which One Should I Buy?
Large work trucks are meant for one thing: work! These vehicles are rough and ready, and can handle nearly anything you throw at them, with the exception of a car pool. While they offer two or four door options, you...
The Best Used Cars to Buy If You Have Limited Mobility
When When you have limited mobility there are a number of challenges you face, one of these can be with your vehicle. Finding a car that meets your specific needs, and addressing your challenges can mean the difference between being...