Yatish123
New member
Hi Members and a Happy New Year to everyone.
I have an 2009 e92 335i DCT as previously mentioned sometime back when I bought my car. I have it for almost 3 years and I have never had any real issues until a few weeks back now. All my services was done with BMW and was stock standard which I looked after.
The start of my problems came around 3 weeks ago, when I decided to do stage 1 software and downpipes on my car in Jhb before I could come back to Durban.
The very same day, when I had received my car after the modifications, my expansion tank cracked open at the side and was replaced the next day and when it was up to temperature, it held up and that problem was solved. The car was running fine in Jhb and had no problems whatsoever.
So I then drove down to Durban a few days later. On my drive down to Durban, approx. 100km into my trip, an engine warning light came up, "Engine fault! Reduced power" which made me extremely worried, I then proceeded to pullover and switch the car off and then then on, which removed the fault warning. It did this around 4 times down on my trip to Durban and was advised by my tuner, the car would be fine to drive down and he would be down in Durban to take a look at it in a 2 weeks, even when the warning light did come on, it felt like I had all my power rather than it being reduced. I made it down to Durban in one peice and it felt like the car was at it's optimum.
1 day later, I decided to take a drive to ballito, which is around 14km from my residence. On the fast lane with lots of traffic, I received multiple warning lights and then my car was stone cold dead on the fast lane which caused a huge traffic situation. I then got a rollback to tow it away and the next day I took my battery to a battery centre which confirmed it was dead and I needed to replace it which I did. I got a diagnostic guy to come out and clear any faults which he did when the new battery was replaced. It started fine and I had no warning lights which felt good to see, I then drove it locally and then the dreaded, "Engine fault! Reduced power" light came on once again and this time was different as the car felt very slow and the car was shuddering with reduced power and misses when you rev and once again, I switched off and then on again which removed the warning light and car felt fine until it did it again 5 minutes later.
I then parked the car off and did not use it again for 3 days. When I did start it after 3 days, the swing of the start felt longer then usual from 1 swing to 3 swings which I felt was strange so I then proceeded to check my alternator which was charging so that was not the issue.
I then realized and confirmed my theory, if I drive the car efficiently or hard if the oil temperature is under 100°C, no warning lights or any lack of performance symptoms are shown. As soon as it reached around 100°C, it then threw the engine fault light sometimes with actual loss of power and sometimes without. I tested it this theory twice and this is the conclusion I have come too.
Is there anyone that has had the same or any similar issues to mine and if any of the members are willing to give me some advice on what I should do and if anyone can help, it would be highly appreciated.
Thank you!
I have an 2009 e92 335i DCT as previously mentioned sometime back when I bought my car. I have it for almost 3 years and I have never had any real issues until a few weeks back now. All my services was done with BMW and was stock standard which I looked after.
The start of my problems came around 3 weeks ago, when I decided to do stage 1 software and downpipes on my car in Jhb before I could come back to Durban.
The very same day, when I had received my car after the modifications, my expansion tank cracked open at the side and was replaced the next day and when it was up to temperature, it held up and that problem was solved. The car was running fine in Jhb and had no problems whatsoever.
So I then drove down to Durban a few days later. On my drive down to Durban, approx. 100km into my trip, an engine warning light came up, "Engine fault! Reduced power" which made me extremely worried, I then proceeded to pullover and switch the car off and then then on, which removed the fault warning. It did this around 4 times down on my trip to Durban and was advised by my tuner, the car would be fine to drive down and he would be down in Durban to take a look at it in a 2 weeks, even when the warning light did come on, it felt like I had all my power rather than it being reduced. I made it down to Durban in one peice and it felt like the car was at it's optimum.
1 day later, I decided to take a drive to ballito, which is around 14km from my residence. On the fast lane with lots of traffic, I received multiple warning lights and then my car was stone cold dead on the fast lane which caused a huge traffic situation. I then got a rollback to tow it away and the next day I took my battery to a battery centre which confirmed it was dead and I needed to replace it which I did. I got a diagnostic guy to come out and clear any faults which he did when the new battery was replaced. It started fine and I had no warning lights which felt good to see, I then drove it locally and then the dreaded, "Engine fault! Reduced power" light came on once again and this time was different as the car felt very slow and the car was shuddering with reduced power and misses when you rev and once again, I switched off and then on again which removed the warning light and car felt fine until it did it again 5 minutes later.
I then parked the car off and did not use it again for 3 days. When I did start it after 3 days, the swing of the start felt longer then usual from 1 swing to 3 swings which I felt was strange so I then proceeded to check my alternator which was charging so that was not the issue.
I then realized and confirmed my theory, if I drive the car efficiently or hard if the oil temperature is under 100°C, no warning lights or any lack of performance symptoms are shown. As soon as it reached around 100°C, it then threw the engine fault light sometimes with actual loss of power and sometimes without. I tested it this theory twice and this is the conclusion I have come too.
Is there anyone that has had the same or any similar issues to mine and if any of the members are willing to give me some advice on what I should do and if anyone can help, it would be highly appreciated.
Thank you!
