Limp Mode & EML Light? Help!

Hey guys i have 2000 323i bmw which i just bought.

the guy i bought it off said that he replaced the throttle body sensor which is the culprit for being in Limp Mode.

now, himself and the BMW mechanic said it was replaced/fixed and within 2 weeks it should 'reprogram' itself into the ECU and be back to normal. i asked another mechanic and they said yes it should be fine. I however dont know a lot about engines so i was wondering if it's true or not.

problems:
won't let me go over 80 kph or 4000+ rpm.
and sounds a bit lumpy
loss of power.

if it's genuinly ****ed what should i do? hahaha

sorry for being such a noob.

Happened to me once... Was the transmission

Is the SES n EML light on??

the only lights on are 'EML' and the Warning Lamp for 'ASC' (the triangle with exclamation mark inside and the arrow circling)

I see. I'm no expert on this but I had this same problem, my SES n EML was on everytime I drive the car and the ASC came on everytime I reversed the car. So I read the code on the car and it happened to be the TPS/pedal (that's what the code says anyway) so I replaced the pedal and the problem was still there, and guess what? The real problem was the TPS above the oil filter. After I replaced that TPS the car run better and it's not throwing the codes anymore. I hope. Lol but yeah it's just from my experience. I got 02 M3 so idk if it's the same or not.

apparently it has all been fixed and replaced and within two weeks it should be back to normal in two weeks and it's all good to be driven, i just thought you could drive it away once its replaced and it'd be fine, but that doesn't seem to be the issue. hmm..

Hmm. My car was fine right after I replaced the TPS. all I had to do was reset the code and it's all good. Idk what going on on urs then. But EML usually TPS problems.

Do you know if the throttle adaptations were reset after the throttle body was replaced?

http://tis.spaghetticoder.org/s/view.pl?1/04/35/75
Note:
A faulty throttle adjusts the adaptation values stored in the DME control unit. These adaptation values must be reset after the throttle assembly has been replaced.
Clearing adaptation values:
- Connect DIS Tester
- Select vehicle type
- Select "DME Motor Electronics MS42", ne carry out individual brief test
- Continue with bottom right arrow
- The "Fault pattern selection" window appears.
Select "Function selection" (bottom left)
- The "Function and component selection" window appears:
- Select "Service functions"
- Select "Drive"
- Select "Digital Motor Electronics"
- Select "Reset adaptations"
- Select "Test schedule" (bottom left)
- The "Test schedule" window appears. ne Select "Reset adaptations"
- Continue with bottom right arrow
For subsequent procedure, follow DIS instructions.
The new adaptation values are stored in the DME control unit after the engine is started for the first time.

wouldnt have a clue, so im going to speak with the guy tomorrow and put in for it to be checked at a different qorkshop.

thanks a lot guys, greatly appreciated!

Good luck!!

Originally Posted by jaykvilla

the only lights on are 'EML' and the Warning Lamp for 'ASC' (the triangle with exclamation mark inside and the arrow circling)

Let me get my "Easy Button" I just fixed this exact problem on my 00 E46 323i. Your Throttle Body flap isn't opening you've got carbon build-up preventing your flap from opening letting air into your engine. The EML code on a Peake scanner is (77) MDK Motorized Throttle valve mechanically stuck. You will need to pull the throttle body clean it and reopen it. There are a ton of DIY for removing and cleaning throttle body's. It's a relatively simple DIY process involving removal of the MAF, lower intake hoses, IVC in order to get the throttle body. Remember to disconnect the negative battery terminal before starting this job or you will have to reset the MDK adaptation. Just my two and a half cents worth...

I had a similar problem a year or so ago, somehow the throttle body was stuck (even though I had cleaned all of that within the last year. Shop said on my car the TPS unit down there is part of the throttle body and was fried so they had to replace it. Worked fine after they did that and gave it back to me. It shouldn't be in limp mode at all if they fixed the correct problem. There is also a TPS at the pedal as some have mentioned...

Originally Posted by Jrob1

I had a similar problem a year or so ago, somehow the throttle body was stuck (even though I had cleaned all of that within the last year. Shop said on my car the TPS unit down there is part of the throttle body and was fried so they had to replace it. Worked fine after they did that and gave it back to me. It shouldn't be in limp mode at all if they fixed the correct problem. There is also a TPS at the pedal as some have mentioned...

Only one problem between your issue and Jaykvilla's problem. The E46 323i has a mechanical throttle body with a wire accelerator, your throttle body is drive-by-wire and not mechanical like the one in the E46 323i.

happened to me before, it was the engine position sensor. its a small sensor under the intake right on the engine. ~$200 for the part at the dealer.

thanks guys but according to the mechanics the TPS was replaced and is all clean...
heard from sources that it has to configure itself to the ECU which normally takes approx 320 kilometres.. see after that.. if not i wont be happy haha

I've brought a 323i se last week and I now have the same problem when I turn the ignition on I have EML and ASC and the car will not rev past 3k