Glow plug 2 fault
- Thread starter Hi.D
- Start date
Standard cylinder numbering is from the Free end (belt end).
Thanks all for info. I've had van since end April this year at 78500 miles and it's now on 80250. One owner with full vw service history (all at same service centre) which I have a printout of. History shows it's had two sets of glow plugs fitted - first at 62000 (Dec 2022 No. 3 fault) and second at 74400 (Jan 2024 just lists glow plug warning on). Seems a bit soon for another one to go doesn't it.
Do the connector plugs on the non pressure sensor ones just pull off like a spark plug cap, or is there a clip you have to fight with? I might try and get at it to test it to eliminate a wiring fault.
Do the connector plugs on the non pressure sensor ones just pull off like a spark plug cap, or is there a clip you have to fight with? I might try and get at it to test it to eliminate a wiring fault.
At least if they’ve been changed they should come out!
Caps are a tight fit and in a recess. You can get special pliers but I just used what I had to hand. No retaining clip/barb to fight with.
If it is a wiring fault what is the repair strategy?
Caps are a tight fit and in a recess. You can get special pliers but I just used what I had to hand. No retaining clip/barb to fight with.
If it is a wiring fault what is the repair strategy?
Highly unlikely that there would be a failure in such a short time.
I’d be suspicious that they were never replaced on at least one of those occasions.
Not unheard of for a workshop to take the cash for the expensive job after making a quick fix like a wiring fault.
I’d be suspicious that they were never replaced on at least one of those occasions.
Not unheard of for a workshop to take the cash for the expensive job after making a quick fix like a wiring fault.
I was thinking that's a very short time between failures...
Possible wiring or connection issue?
Maybe from the relay controler or corrosion on some pins somewhere?
Very unusual for a failure that short..... But then was it OEM parts that were used question mark or cheap Chinese knockoffs that have no longevity.
Possible wiring or connection issue?
Maybe from the relay controler or corrosion on some pins somewhere?
Very unusual for a failure that short..... But then was it OEM parts that were used question mark or cheap Chinese knockoffs that have no longevity.
Well, they should have been OEM because all work has been carried out by VW dealership but I too am a bit concerned that a technician may have booked out a set of plugs but only fitted the one that was faulty, possibly twice!
I took the bottom air hose to intercooler off today but there wasn't enough room to get at No.2 connector so I think I'm going to have to bite the bullet and try and find a local garage who has experience on T6's and I'll just have to put my trust in them not to be too ham-fisted about it.
At least I've done some of the fault finding to reduce a bit of labour cost.
I took the bottom air hose to intercooler off today but there wasn't enough room to get at No.2 connector so I think I'm going to have to bite the bullet and try and find a local garage who has experience on T6's and I'll just have to put my trust in them not to be too ham-fisted about it.
At least I've done some of the fault finding to reduce a bit of labour cost.
Can highly recommend QT VANWERKS in St Ives. Replaced our #2 & #3 glow plugs a few weeks ago
Thanks for that, I've sent them a message for a quotation
Quattro Tech Peterborough responded - got it booked in on 24th. I got a panic on - got mixed up with MOT date, I thought it was 14th Dec, but it was November!! Luckily fault cleared long enough to get it MOT'd - passed, with no advisories so really pleased..... And relieved... Phew. Now just gotta hope that glow plug comes out ok
I had a MIL on for a faulty glow plug.
The glow plug controller relay reports the fault.
The glow plug controller relay reports the fault.
Definitely glow plug fault with engine symbol showing
1 Fault Found:
15918 - Cylinder 2 Glow Plug Circuit (Q11)
P0672 00 [11101100] - Electrical Fault
MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 3
Mileage: 129172 km
Date: 2078.14.26
Time: 17:22:30
Engine speed: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 12 C
Intake air temperature: -1 C
Ambient air pressure: 990 mbar
Voltage terminal 30: 11.851 V
Unlearning counter according OBD: 40
Pre-glow time: 2.5 s
Glow status: Readiness heat
Outside temperature sensor 1: B1: raw value: 11.5 C
Regens also been completing ok. I do mostly shortish journeys and it seems to do them about every 200 miles. My son's car broke down and I've been taking him to work this week and I've been getting a bit concerned that a regen hasn't taken place yet and it's just over 290 mile since last regen. Just taken these readings this evening:
Address 01: Engine (04L 906 056 MH)
20:28:38
IDE00430 Particle filter: field regeneration request status no request
IDE00431 Particle filter: field regeneration lock status 8
IDE00432 Particle filter: time since last regeneration 704 min
IDE00434 Particle filter: soot mass calculated 28.23 g
IDE00435 Particle filter: soot mass measured 15.66 g
IDE00436 Particle filter: kilometers since last regeneration 503.8
From what I've read seems like DPF should start regen between 18-25g soot mass so hopefully it's just that it's producing less soot because I'm doing longer dual carriageway journeys.
Just re-read your message and yes, I see what you mean about the actual glow plug. I assume the system just picks up a high resistance or open circuit between the relay and the glow plug to earth which would indicate a fault either on the wiring to the glow plug from relay or because of the plug itself. Only way to tell would be to access the plug, remove the cap and test each part separately.
And change the relay - I had 2 fail on my t-cross, one at 50 miles from new and the second at around 900 miles.
Hoping I've eliminated the relay from our enquiries by removing it and checking resistance between each glow plug 'feed' pin in the relay mounting plug to the battery earth cable clamp (battery removed/disconnected). 1,3 and 4 were 1.1 Ohms, No.2 was 34, so there's something definite to be sorted there first - hopefully, just the glow plug
I had a faulty number 2 plug recently, P0672, supposedly siezed in. Got it out at 30nm with some release spray after i was quoted stupid money for it to be drilled out. Needless to say, i wont use that garage again. Measured it after removal and it was open circuit. PITA to get to it but worth it.
Had to put back glow plug replacement AND few nights out in caravan due to still ferrying kids back and forth to work!! Can't risk a problem with mine else we'll be right jiggered. Was toying with doing it myself but local VW 'specialist' has quoted £140 all in with OEM part so I thought that should be well worth the hassle.... fingers crossed. One thing's for sure, those regens are certainly getting a testing 
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