MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: Scottymon on August 25, 2013, 07:38:36 pm

Title: Who knows about Throttle Bodies?
Post by: Scottymon on August 25, 2013, 07:38:36 pm

Looks like I may need a TB.  EPC light on and following logged error:

000546 - Angle Sensor 2 for Throttle (G188): Signal Too Low

Thing is, it was just the other day I had an intermittment battery light on/off; thread here (http://www.mk5golfgti.co.uk/forum/index.php/topic,71558.msg766080.html#msg766080)
Could this be related?  A dieing alternator causing electrical faults..?

As far as replacing the TB, are there any tips/diys around?  Would I be correct in thinking... in through the bottom, remove TB pipe, then off with the connectors and 4x bolts..?  Do you have to recalibrate with VCDS afterwards?

Title: Re: Who knows about Throttle Bodies?
Post by: vRSAlex on August 25, 2013, 08:00:58 pm

Loads of threads about it. You deffo need a new one though. Bit of a fiddle to fit. Make sure you get a brand new one not a used one.

Title: Re: Who knows about Throttle Bodies?
Post by: Scottymon on August 25, 2013, 08:15:58 pm

Thanks, I hear what your saying about a new one but I could get 10x used ones for the price on one new - I feel that's there's something else a miss lately, with random errors from MAF / Alternator / DV... think I'll grab a used one, get it through it's MOT and go from there, if it comes up again I'll look at a new one.

This will be about the 4th electrical thing I've replaced recently, from cruise control, wiper motor and mech, drivers side window motor and switches.... something clearly not right.
Not to mention offside CV :sad1:

Would the EPC light fail an MOT with these new regs? 

Title: Re: Who knows about Throttle Bodies?
Post by: bacillus on August 25, 2013, 09:18:50 pm

Quote from: Scottymon on August 25, 2013, 08:15:58 pm

Would the EPC light fail an MOT with these new regs? 

Yes, all warning lights must extinguish themselves on starting.

Title: Re: Who knows about Throttle Bodies?
Post by: Scottymon on August 25, 2013, 10:44:17 pm

Quote from: bacillus on August 25, 2013, 09:18:50 pm

Quote from: Scottymon on August 25, 2013, 08:15:58 pm

Would the EPC light fail an MOT with these new regs? 

Yes, all warning lights must extinguish themselves on starting.

Super, had a feeling that was the case.

Title: Re: Who knows about Throttle Bodies?
Post by: Scottymon on August 26, 2013, 07:37:04 am

Seems quite a few American Mk5 owners are running a ground cable from TB to chassis or neg. terminal... Is this worth doing on the new TB, or is it already grounded indirectly through part connection?