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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 01-15-2014, 10:53 PM   #1
Registered User
Join Date: Aug 2012
Location: Ohio
Posts: 12
My Ride: Noneya
My "limp mode" experience with error 230 - EGAS sensors

I wanted to post this because it took me a lot of searching and head scratching before I figured this problem out myself. It turned out to be something extremely simple and rather silly. I've posted to another forum as well, to further get the word out.

I found a ton of posts from people with TPS/gas pedal problems who were just throwing money at new sensors to try to fix it. Many were confused about testing with multimeters, and many had a problem that remained even after replacing/testing everything (even a $4-500 actuator motor!) Sometimes, people would pay a lot of money for diagnostics, and nothing would be found... but the problem would go away. Hmm...

Let me just say this: Be sure that nothing is hindering the movement of the throttle linkage before you start spending money! It sounds dumb now, but you may not think of it when you are convinced it is an electrical issue. In my case, I had the plenum off in order to install a sensor for an oil pressure gauge. When I got everything back together, I suddenly started getting EML lights and limp mode above a certain throttle percentage. It would happen in the same situations every time, and it would throw the same error 230 EGAS setpoint/actual-value monitoring. It would have been a big coincidence for a sensor to go out at that exact time, so I knew it was something I had done. I had the front TPS unplugged, and I also moved the linkage by hand while I was in there, so I was beginning to worry that I had messed something up. I was clearing adaptations, considering attempting to re-sync the TBs, and etc. when suddenly, it hit me. I didn't even have to look at the car to be sure this was my problem. Something got in the way of the linkage when I put everything back together. This caused the actuator to stop once it hit the obstruction, so it did not agree with what the gas pedal was requesting. Instant limp mode. Simple (and FREE!) fix.

I don't mean to toot my own horn, but if this can happen to me, it can happen to anyone. I like to consider myself quite mechanically inclined and very careful when putting things back together. I'm not nearly as electronically inclined, but I'm getting there. I hope this helps some people out and saves some money.

Sections in bold for easy locating in the middle of my long post.
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egas, eml, error 230, limp mode, tps

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