Last night on my way home from work I attempted to change from 2nd gear into 3rd when my car went into limp mode. I had to pull over but had no acceleration. I managed to crawl home (luckily i was only a few miles from home) but couldn't go over 30mph. My car was really juddery as if I was in a too high gear for the speed but when I changed into a higher gear the juddering stopped and had to have my accelerator flat to the floor or else the juddering started again.
I managed to get the car to my local garage. They couldn't see the fault as didn't have the correct software but thought it may be something to so with my throttle.
They scanned the car again and took all faults off. The car started and drove with no problems after.
On Monday night on way home from work I had to drove through a very deep puddle so the garage think water was in somewhere in my throttle or something.
I have driven the car home with no problems but still wary.
Has anyone else had a similar problem or know what it could be?
Mini want £116 per hour!!! Just to diagnose so trying to get free advice.
If the fault happens again:
Check or try replacing the Lambda/Oxygen sensor(s) in the exhaust as these can often go faulty and trigger the EML light and limp mode due to high emissions reading. The deep water may have affected one of the sensors or it may just be coincidence and failed through age/wear & tear. Any good garage that does MOT's should be able to check and replace these sensors......not a big job.
Worst case is deep water can also damage the exhaust Catalytic converter, ie. when the very hot cat comes into sudden contact with cold water. Inside of cat can collapse/shatter blocking the exhaust and killing full engine performance until blocked cat/exhaust is replaced. Unlikely in your case as fault was cleared.
The light signifies you're in limp home mode, the car can do this for a number of reasons. With out error codes it's hard to tell what caused it. I had it happen on my MCS when a valve spring went causing a misfire in one cylinder for example.
Did the garage tell you the last few codes before they wiped them ?
Just last week I just had this same problem on my 2002 MCS with 48,000 miles on it. Along with the Limp Mode (aka fail-safe mode) the "Service Engine Soon" light came on. I had it towed to my local non-MINI mechanic (because he was close by) to have him read the code for me. It was P1125. Some research on his part revealed the issue was likely with the Throttle Body - Valve, or Throttle Control Unit. He located it to inspect it (I believe it is under the air box) and found it to be very dirty. He cleaned it and it seems to be working just fine since. In the meantime, I also spoke to my not-so-local MINI specialist (Not dealer) and as soon as I told him the code he knew exactly what it was. He said if the Throttle Body needed to be replaced it would be 1.5 hours labor ($260) and about $120 for the part itself. It does not sound like a tough job, so if it happens again I will likely do it myself. I never knew to inspect this (but I will going forward).
P.S.- There is also a possibility that the pins on the electrical connection to this unit are corroded or the wiring harness is damaged. I asked the MINI specialist about this and he said that they don't see much of that in Pittsburgh PA. It is more typical in hot climates where the wiring dries out and cracks or maybe high humidity corrodes the pins. But if the harness is bad it must be replaced.
Please contact me if you are interested in joining our MINI Club, serving W.PA, E.Ohio & W.VA
had a 2001 jetta 1.8T going to work one day about 10 degrees turbo is pumpin!! 25 lb boost!! passing up the mountain road, felt like car shut off, engine idled but no throttle, turned out the throttle body that has 2 sensorsn not replaceable died $150 for TB 1/2 hr labor $40. i cleaned it in the past 4 screws, 1 electrical connection + a hose clamp, EASY. there was a pile of TB's on the garage floor, had 150,xxx on the clock at the time!!
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