Please help! p0306 code drama
Junior Member
Joined: Aug 2017
Posts: 4
Likes: 0
It may be that the Crank Sensor needs to be re-calibrated in program for Neutral Re-learn.
This is a dealer only action or a few high-end Scanners that has that ability. Forscan does not have the ability, so an inquiry says.
If you check out about the Neutral Re-Learn on Ford engines, it will tell about the same possible misfires and codes being experienced by users in this thread.
Good luck.
This is a dealer only action or a few high-end Scanners that has that ability. Forscan does not have the ability, so an inquiry says.
If you check out about the Neutral Re-Learn on Ford engines, it will tell about the same possible misfires and codes being experienced by users in this thread.
Good luck.
Senior Member
Joined: Mar 2021
Posts: 4,789
Likes: 2,390
The codes set tell the story.
Misfires are either lack of fuel or loss of Ignition. With work done, there is always a chance additional fault has been introduced inadvertently.
Both Banks are involved.
Operation separation between Port and Direct Injection are able to be seen with a scanner.
Playing checkers with parts has not proven a fault
Deeper analysis has to be done to find the common root cause.
.
On cold stsrts and restarts, the emissions test goes into effect.
This should not cause codes to be set unless there is a system detected failure.
.
Maybe the Crank Sensor is faulty. If replaced, the Neutral Learn should be done if the Sensor is replaced to be sure that does not continue to be an issue.
The Crank Sensor signal has to be there solid, or many other timed functions will also fail. They are Injectors, Coils, Crank Revolution Tine measurements etc.
Anything missing while the engine is even cranking or running will set code as it should do and has done, in this case.
Good luck.
.
Misfires are either lack of fuel or loss of Ignition. With work done, there is always a chance additional fault has been introduced inadvertently.
Both Banks are involved.
Operation separation between Port and Direct Injection are able to be seen with a scanner.
Playing checkers with parts has not proven a fault
Deeper analysis has to be done to find the common root cause.
.
On cold stsrts and restarts, the emissions test goes into effect.
This should not cause codes to be set unless there is a system detected failure.
.
Maybe the Crank Sensor is faulty. If replaced, the Neutral Learn should be done if the Sensor is replaced to be sure that does not continue to be an issue.
The Crank Sensor signal has to be there solid, or many other timed functions will also fail. They are Injectors, Coils, Crank Revolution Tine measurements etc.
Anything missing while the engine is even cranking or running will set code as it should do and has done, in this case.
Good luck.
.
Thread Starter
Junior Member
Joined: Aug 2025
Posts: 9
Likes: 5
The codes set tell the story.
Misfires are either lack of fuel or loss of Ignition. With work done, there is always a chance additional fault has been introduced inadvertently.
Both Banks are involved.
Operation separation between Port and Direct Injection are able to be seen with a scanner.
Playing checkers with parts has not proven a fault
Deeper analysis has to be done to find the common root cause.
.
On cold stsrts and restarts, the emissions test goes into effect.
This should not cause codes to be set unless there is a system detected failure.
.
Maybe the Crank Sensor is faulty. If replaced, the Neutral Learn should be done if the Sensor is replaced to be sure that does not continue to be an issue.
The Crank Sensor signal has to be there solid, or many other timed functions will also fail. They are Injectors, Coils, Crank Revolution Tine measurements etc.
Anything missing while the engine is even cranking or running will set code as it should do and has done, in this case.
Good luck.
.
Misfires are either lack of fuel or loss of Ignition. With work done, there is always a chance additional fault has been introduced inadvertently.
Both Banks are involved.
Operation separation between Port and Direct Injection are able to be seen with a scanner.
Playing checkers with parts has not proven a fault
Deeper analysis has to be done to find the common root cause.
.
On cold stsrts and restarts, the emissions test goes into effect.
This should not cause codes to be set unless there is a system detected failure.
.
Maybe the Crank Sensor is faulty. If replaced, the Neutral Learn should be done if the Sensor is replaced to be sure that does not continue to be an issue.
The Crank Sensor signal has to be there solid, or many other timed functions will also fail. They are Injectors, Coils, Crank Revolution Tine measurements etc.
Anything missing while the engine is even cranking or running will set code as it should do and has done, in this case.
Good luck.
.
Thread Starter
Junior Member
Joined: Aug 2025
Posts: 9
Likes: 5
Ok. After searching to the ends of the earth on the internet for a possible solution, I found several occasions where sludge was causing this issue (stuck hla, blocked passages, etc). I definitely dont believe in mechanic in a can type products, but I figured why the hell not since nothing else is working. Bought some cheap oil, an Mc filter and 2 cans of liqui moly sludge remover. Dumped it in the oil and started driving it. Around mile 125, all the misfires quit and its as smooth as glass. Im dumping the current oil tomorrow and putting in fresh mc 530.....i guess we will see if this fix lasts.
Thread Starter
Junior Member
Joined: Aug 2025
Posts: 9
Likes: 5
Ok, the liqui moly sludge remover worked! I ran it 300 miles and like I said above, all the misfires quit at mile 125. Its been several hundred miles now and everything is running better than it has in a long time. I will be adding this to the crankcase oil 300 miles before every oil change now. I will report back if anything changes, but so far so good. Hope this helps some folks, and thanks everyone for the the help.
heres a link to the product:
Thanks
Josh
heres a link to the product:
Thanks
Josh
Senior Member
Joined: Mar 2021
Posts: 4,789
Likes: 2,390
Ok, the liqui moly sludge remover worked! I ran it 300 miles and like I said above, all the misfires quit at mile 125. Its been several hundred miles now and everything is running better than it has in a long time. I will be adding this to the crankcase oil 300 miles before every oil change now. I will report back if anything changes, but so far so good. Hope this helps some folks, and thanks everyone for the the help.
heres a link to the product: https://www.amazon.com/dp/B001CZM8EI?ref=fed_asin_title
Thanks
Josh
heres a link to the product: https://www.amazon.com/dp/B001CZM8EI?ref=fed_asin_title
Thanks
Josh
A comment: Be sure you read the instruction for using the cleaner, so it is not in to long..
Reason: Cleaners are not Lubricants and only used for a short time.
That time is what is important to keep from doing damage.
I would not be doing this on a repeated basis for the above reason.
Good luck.