BBA-Reman Forums



Vauxhall Astra H Z16XEP Fault Code p0115

Posted By R & D VEHICLES 1/18/2010 11:50:29 AM
Add to Favorites1
Author Message
R & D VEHICLES
 Posted 1/18/2010 11:50:29 AM
Forum Apprentice

Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)

Group: Forum Members
Last Active: 5 hours ago
Posts: 192, Visits: 6,288
239
Hi,

Wondered if anyone could provide some assistance on the above vehicle. 2006 Vauxhall Astra Z16XEP with engine management light on and fault code of p0115 Coolant temperature sensor circuit malfunction logged. No apparent running faults present. The customer (a vehicle sales company) have already fitted both the coolant temperature sensors in the thermostat housing and the radiator with genuine vauxhall units. The fault codes were cleared at that point but after a 60 mile trip the fault has reoccurred with the same fault code logged.

I haven't spent time checking wiring continuity as yet but have checked live data and both sensors appear to be reading and rising with engine temperature. I was just wondering if anyone had come across this as a common failing (ie electrically controlled thermostat failing intermittently or other known fault?)

Any help/advise gratefully received

Regards

Simon

1/20/2010 1:17:30 PM by R & D VEHICLES
topbloke
 Posted 1/18/2010 1:28:16 PM
Forum Technician

Forum Technician - (932 reputation)Forum Technician - (932 reputation)Forum Technician - (932 reputation)Forum Technician - (932 reputation)Forum Technician - (932 reputation)Forum Technician - (932 reputation)Forum Technician - (932 reputation)Forum Technician - (932 reputation)Forum Technician - (932 reputation)

Group: Advanced Members
Last Active: 10/9/2012 5:02:22 PM
Posts: 897, Visits: 5,372
932
the clue is in your post they are "rising together" common fault on this model at the moment , there are two sensors one in rad one in thermostat housing when you check them in live data from cold one should rise (housing one) the other should stay fairly static (rad one) until thermostat opens then once the water is flowing the one in the rad should be a few deg's lower, however brace yourself for the price of the thermostat £200 +, as stated changing these for fun at moment, three since new year (and thats just me ) Regards TB ps rereading your post i am surprised that vauxhall sold you the sensors separately, the only other thought is to check the rad one the wiring has been known to rub on aircon pulley there was a rework for this its called a cable tye
1/18/2010 1:31:54 PM by topbloke
R & D VEHICLES
 Posted 1/18/2010 2:56:25 PM
Forum Apprentice

Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)

Group: Forum Members
Last Active: 5 hours ago
Posts: 192, Visits: 6,288
239
Cheers for quick reply Top Bloke,

I was rather hoping you would cast your eye over this post. I will double check coolant temperature sensor readings from cold tomorrow as per your recommendations. Looks like I'll be fitting a new thermostat. I'll post results when its sorted.

Many thanks

Simon

R & D VEHICLES
 Posted 1/20/2010 1:16:52 PM
Forum Apprentice

Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)Forum Apprentice - (239 reputation)

Group: Forum Members
Last Active: 5 hours ago
Posts: 192, Visits: 6,288
239
Quick update,

After some fantastic info from a truly topbloke the thermostat was replaced. Cooling sensors now reading correctly as described.

Many thanks for the info

Regards Simon

JSR
 Posted 1/11/2011 8:23:29 AM
Saturday Job

Saturday Job - (1 reputation)Saturday Job - (1 reputation)Saturday Job - (1 reputation)Saturday Job - (1 reputation)Saturday Job - (1 reputation)Saturday Job - (1 reputation)Saturday Job - (1 reputation)Saturday Job - (1 reputation)Saturday Job - (1 reputation)

Group: Forum Members
Last Active: 1/11/2011 8:21:31 AM
Posts: 1, Visits: 2
1
Had exactly the same problem with mine - 2005 Astra H 1.6 petrol. The Vx dealers managed to misdiagnose the problem twice. See the link where I've detailed the full diagnosis and thermostat replacement.

https://sites.google.com/site/jsrsprojects/jsrs-car-stuff/jsrs-thermostat-replacement

https://sites.google.com/site/jsrsprojects/

skippy24
 Posted 6/24/2011 7:17:30 PM
Saturday Job

Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)

Group: Forum Members
Last Active: 7/18/2011 5:52:39 PM
Posts: 2, Visits: 5
2
Excellent info. There thanks.

I have been getting similar issues except I have fuse 26A keep blowing. (which give coolant circuit erro codes, EGR error codes, basically all codes related to components on fuse 26A).

After reading many forums, yes the Astra H thermostat and EGR issues are common. (or particulary the Z16EXP engine or related shared components).

Vx say is my thermostat housing. They I said I need part 55559594 which in Thrmostat housing, thermostat and EGR. (£275 from Vx Dealer, £168 elsewhere). Vx fitting £96, my fitting free! (fingeres crossed). Dont know what I'm doing but the link/guide supplied plus haynes manual always helpful.

Hope this is still all resolved for you too.

Regards,
Skippy

Astra 1.6 2005 Z16EXP engine
6/25/2011 3:38:06 AM by K And R
K And R
 Posted 6/25/2011 3:42:28 AM
Forum Master Technician

Forum Master Technician - (12,485 reputation)Forum Master Technician - (12,485 reputation)Forum Master Technician - (12,485 reputation)Forum Master Technician - (12,485 reputation)Forum Master Technician - (12,485 reputation)Forum Master Technician - (12,485 reputation)Forum Master Technician - (12,485 reputation)Forum Master Technician - (12,485 reputation)Forum Master Technician - (12,485 reputation)

Group: Moderators
Last Active: 3 hours ago
Posts: 11,213, Visits: 59,483
Skippy

I have edited your discription of a dealer in the above thread ! (dealer does not start with an "S" )

Fitting of a non genuine part (ie from the dealer) is always a gamble, even when it comes in a genuine box (many fake genuine boxs out there)

Kev.

"If you dont KNOW how it works, don,t try to test or fix it"

skippy24
 Posted 7/18/2011 5:30:57 PM
Saturday Job

Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)Saturday Job - (2 reputation)

Group: Forum Members
Last Active: 7/18/2011 5:52:39 PM
Posts: 2, Visits: 5
2
I'd just like to confirm that my dad and I have successfully replaced the thermostat housing (consisting also of a new thermostat and EGR valve). For £100 cheaper than Vx (and yes is a genuine Vx part).

After installing, refilling coolant, getting air out etc.. resetting error codes (with very useful op-com). All is running sweet, no longer sluggish and not getting overheated car pulls so much better, like when I first got it. Wasnt too bad to fit really.

Hopefully thats cured that issue. (fingers crossed). Now to sort out my constant knocking over any form of bumps.

Many thanks for the info from other people on this thread, especially useful link about thermostat.

Reading This Topic

Expand / Collapse

Back To Top