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View Full Version : XE fault code 15 - CTS High voltage


Mazz
02-09-10, 01:26 PM
Drive along earlier and when i dipped the clutch the rev's stuck (almost like the throttle cable was still pressed) So i turned it off and quickly flashed the codes, and got 15 back which according to Topbuzz is 'CTS High voltage'

Would a dodgy CTS cause the rev's to hold like they were? It has been popping a bit too..
Nova_Tek
02-09-10, 02:14 PM
How high were the revs holding? Cold idle speed as if the choke was out?

The CTS tells the ECU how warm the engine is and adjusts idle and fuel mixture IIRC. If it's knackered then it was falsely inform the ECU it's cold knocking the revs up to warm it up.
Sloth
02-09-10, 02:19 PM
read this, make sure you read the right bit for your system:

http://www.pngclub.com/forum/showthread.php?p=1661865#post1661865
Southie
02-09-10, 02:19 PM
You might also have a loose wire on the CTS worth giving it a check first.
Mazz
02-09-10, 03:16 PM
Thought that Southie...

Rob, i'll have a read ta.

Tek : the rev's were sticking where ever i dipped the clutch, 2-4k normally..

The engine was warm, its an early dizzy XE with lambda. The fault seemed slightly intermittent, majority of the time it was on, but did go a few times for 2-5 mins a go..
Sloth
02-09-10, 04:01 PM
its got motronic m2.5 then. sure your cable is free and lubed?
Mazz
02-09-10, 04:24 PM
oo-er :p

Its was fine for 15 or so miles, then tootling down the road, about to pull up, changed from 3rd to 2nd and (didn't realise the rev's had stuck) it accelerated. hmmm, ecu light on. flashed codes as above, got 12, 15 & 31 back..I know what 12 & 31 are...
Mazz
02-09-10, 04:47 PM
Anyone know the part number for one? Or where to get one?
Damo
02-09-10, 09:07 PM
Just give autovaux a ring mazz they were mega helpful with me when i went yesterday.:thumb:
nova_saloon
02-09-10, 11:26 PM
had this problem with mine ended up the wires were pretty rottern as they sit on the front of the car they can just get caught in rain and corrode causing crappy signal
NitrousVaux
03-09-10, 08:26 AM
I had the same problem, fault code didnt come up as that. Check the wiring to the idle valve, my connector doesnot have the metal bit and would slip off after some hard driving and engine moveage!