[alexstrong29]

Originally Posted by mike-tomo

Alright guys so I've had my 320d 2 weeks now n it's came up with engine management light, and car running weird in lower speeds ( hesitation around 30-45 mph around 3rd n 4th gear, I plugged it in got the p115d code to which I replaced the maf sensor with new one and it's still having the same problems lights back on and the engine feels hesitant again at certain speeds 😕 Any advice guys ? Anyone had this ?

I there, I started with this issue over a year ago. Engine management light on and code reading as p115d indicating MAF sensor.

Strangely about 2 years ago I had the same issue but it went in for its recall and had the EGR cooler changed. The light went away and a year later came back on. My local mechanic did a smoke test to check if there were any leaks and there weren't any. Changed the MAF sensor and was then at a loss.

I took matters into my own hands and got a laptop all setup with INSTA to connect to the car directly and read it myself. It was quite tricky to get all the software working properly but I am a software guy so eventually got it all connected and reading info from the car.

I had a few errors show up that weren't read by my OBD wifi dongle thing. I could see the error related to the MAF sensor but initially it was pointing towards an injector needing to be replaced.

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I'm not sure why this wasn't shown up on the basic OBD dongle but probably because BMW want you to go and get the car read at $$$ at a service centre.

I made a plan and bought two bottles of Wynns diesel injector cleaner and one bottle of wynns turbo / egr cleaner. My plan was to do a tank each for the two injector cleaners and then lastly the turbo / egr cleaner. I have always had a hunch it was related to the egr valve getting a build up of soot or something inside it because the issue went away for a year after the egr cooler was changed. Anyway, got to the third tank of fuel a quarter left (this was the one with the turbo / egr valve cleaner in) and then the light went off.

It's been a couple of days since and the light is still off so I am hoping that my plan worked as the light had been on for a solid year beforehand. My car has done just over 50k miles and had no symptoms which is what really got me stuck. I hope this post helps someone as it would have helped me.

Here are some other screenshots I took of INSTA. I'd highly recommend any BMW owner getting setup with this as it was so easy once I got through the pain of getting it setup.

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