BlaqueM5

I've been getting this code off and on for the past couple of days. Also sometimes when I start, the car goes into "ENGINE FAILSAFE MODE" and won't rev until I turn it off and restart. Anyone have any ideas what may need to be replaced? I have search the forum and couldn't find any issues related to this particular code. P1634 Thanks in advance

Robert

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2001 Jet Black M5
-TMS SHARK INJECTOR
-B&B TRIFLOW EXHAUST
-SUPERSPRINT X PIPE
2003 Mercedes C230K

Need4Spd

The throttle valves (one for each cylinder) are actuated by electric servos. From the code description, sounds like one or more valves or their sensors have failed. This will likely require a visit to a professional tech.

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Need4Spd
'01 M5/UUC SSK + Rogue WSR/RE Tranny Mounts+Royal Purple Synchromax/Centric Posi-Quiet Pads/StopTech SS Lines/TC Design from BeastPower Anti-roll Bar Brackets/Dinan LtWtFlywheel and Stage 3 suspension/Goodyear F1 GSD3s/Vines thrust arms/IATS relocation/10w-60 oil/hardwired Escort 9500i/Euro Armrest/TEC Cupholder/IceLink/PowerChip 91 Gold/TUBIs!/Strong Strut/BSW Stage 1/BT/Angel iBrights 3.0
'05 M3 Imola Cabrio 6MT, Nav, HK

"Is it the sounds that make a BMW a BMW? A BMW is designed to be heard, felt, experienced. So our engines sing. Our steering talks back. And we insist on offering manual transmissions in nearly all our models for drivers who crave them. The result is an almost telepathic oneness with the car. Just as surely as you can hear a BMW, a BMW hears you."

BlaqueM5

Thanks. Its at the dealer right now. Also I got another code. P1637.

EVO3M3

Hello,
I have a 2001 M5 that is giving me the same codes and error message. Could you tell me what the dealer had to do to fix the problem??
Thank you!

alijonny

very OT: has anyone ever attempted to install carburetors on the s62 like some downdraft webers? that would look cool... but function is another issue!

Need4Spd

Uh, I can't imagine why anyone would want to do that. There would be no increase in HP, and likely a decrease, together with poorer driveability generally, and especially when cold. I suppose it would look cool, though, especially with that big dome or cutout in the hood that would require to clear them.

EVO3M3

Hello,
Thanks for the information on the headers however I was wondering if you know what the other gentelman had to do to correct the issue's he was having from the OBD II code P1634?
Thanks

BlaqueM5

Hi. The dealer replaced the throttle actuator. You can see it here. It is item 1. http://www.realoem.com/bmw/showparts...=12&fg=10&hl=2 They also reset the adaption values. Good as new!

EVO3M3

Thank you for the information do you know what they had to do to reset the other valves? Was it just as simple as clearing the codes and done? (I wish!) BUt is doesn't hurt to ask!

BlaqueM5

I have cleared the codes but, It will keep coming back. At the time my car had 76,323 miles on it.

This is what I have on my receipt:

Customer states there is an Engine failsafe program light on.
Throttle motor faulty.
Interogated fault memory, submitted puma case #12166816, per puma case replaced throttle motor. Also checked throttle body syncronization, throttle bodies syncronized correctly, no adjustment needed. Cleared fault memory, reset adaption values.

Parts 12-72-7-831-246 Throttle actuator

Hope this helps.