Most liked posts in thread: 2008 r56 Base non turbo limp mode issue

This is the one I have. I don't really like doing business with ECS. You may find it on Amazon also

https://www.ecstuning.com/b-schwaben-by-foxwell-parts/professional-bmw-mini-scan-tool/014020sch01a~scf/

Some have used one that uses your iPhone that does all the BMW/MINI codes I think the name is iCarly.

P0300 is miss fire cylinder misfire several cylinders. P0304 could be a fuel injector on cylinder 4.

https://www.motoringalliance.com/articles/ecu-codes-chart-2nd-generation-mini.57/

If it has a miss at idle you could disconnect the coil pack for that cylinder and see if it stays the same. If it doesn't get worse I would check the number 4 injector. Maybe move it to another cylinder and see if it fallows it.

I know you have checked everything but make very sure all the plugs are plugged in correctly and there is no corrosion. Check the vacuum lines for cracks and that they are all plugged in, some can be hard to see and get at.

Let us know what you find. Hopefully some of our Gen2 guys will be along to help. I am a Gen1 guy with Gen 2 leanings,Ha.

 

Better yet. Chad at detroit tuned really knows Minis. I have used this link and leave my phone number he will get back to you and answer your questions. He would probably do it for free but he is running a business and his time is worth something. Besides he really supports the Mini community. Give Chad a try.

https://www.detroittuned.com/phone-tech-support/

 

Welcome to MA! Did you do a reset with your code reader and it did not reset?

 

And you have the half motor symbol on the dash?

 

Just to make sure I understand. The codes reset and did not come back but you are still in limp mode.

if that’s the case all I can think of is you still have codes your reader can’t see and or can’t reset. I looked at a clubman yesterday for my mother-in-law. The guy told me he had replaced the front bumper, hood and AC radiator, the previous owner hit a dear. Anyway it is a very nice car he said it had no codes and I could take it to a mechanic for a pre buy. I hooked up my Cade reader and found a ton of codes. He couldn’t believe it. Most of them were there because of the worked he did. So I cleared them and drove it none of the codes came back.
So right now I think you May need a better reader or take it to a shop that works on Minis and give them $100 to check the codes. If your keeping the car I would get a good reader first. Heck the gen 2 Mini have to have the battery registered to the car when you replace it. Everyone here wanted $100 to do it. After a new battery for my wife’s R57 and my R58 the reader has paid for its self

 

Just a thought. It may be in limp mode because the #4 injector is not delivering enough fuel for higher speeds without going to lean on that cylinder. This could be why it is staying in limp mode

 

It may be leaning out so the limp mode is trying to keep your revs low to avoid damage to the engine. This is just a guess. You could drive it around for a few miles then pull the plugs and take a look at them if one (and sense the #4 is suspect) is chalky white compared to the others then you know one cylinder is too lean. for that matter if one is darker than the otters it is too rich. I bad injector could cause ether.

 

Yes if your reader can read it. P0304 is an injector code. But it may be possible that your reader just didn’t clear everything. I am just making a guess from the codes you gave.

 

Well the only thing I can find is this over at Mini2

https://www.mini2.com/threads/no-throttle-response-after-timing-chain.353423/

I am sorry But this one has me. It could be a bad throttle peddle but I can't be sure of that. They really don't go out very often.

I would make sure every thing is plugged in good and all the plugs are in good shape. Like it says on MINI2 check your throttle body is plugged in well.

Sorry I cant be more help. Let us know what you find.