Code starting with P026_ is a generic code to do with Charge air coolant circuit, which is the liquid cooled intercooler in case of the 2.0 engines both 280 hp veloce and 200hp models.

I would strongly suggest you pop the bonnet and check the intercooler expansion tank level. It may be the leak I experienced as detailed in my post on this link .

https://www.alfaowner.com/Forum/alf...com/Forum/alfa-giulia/1137650-p026a-secondary-coolant-leak.html#/topics/1137650

Let us know if the level is ok. Car will be drivable but as with any hard check engine error codes, defaults to N mode. I was able to clear it with my obd reader but it reappeared a while later.

 

Thanks Metalgod.
I Just checked and I cannot see any leaks and the levels look OK too. It's raining here and quite dark so I'll check again in the morning for leaks.
I'll print off the TSB and show it to the dealer just in case. I don't want them just clearing the code (as I can do with the Torque app)!

Thanks again for the information.
Iv.

 

Thanks Metalgod.
I Just checked and I cannot see any leaks and the levels look OK too. It's raining here and quite dark so I'll check again in the morning for leaks.
I'll print off the TSB and show it to the dealer just in case. I don't want them just clearing the code (as I can do with the Torque app)!

Thanks again for the information.
Iv.

Hi. Did you get anywhere with this? I'm having the same error code, but no leaks and the levels are OK.

 

Good to know. The code is certainly to do with the intercooler system. It may be a sensor out of parameter or else a small leak. Mine was very small over a long period. I was possibly driving with it for ages before the code appeared. You would notice a drop in mpg if I had paid close attention. Good luck and keep us posted.

 

Hi, I had the check engine light on and off for a couple of weeks, mine was stuck in normal mode, would clear after various restarts but no real pattern to it. I finally booked it in for investigation at Motorvogue Kempston and was initially told they would need it for 2 days. Dropped it off at 8 am Monday morning and got a call at 11 am saying the issue was resolved and I could pick it up!...
When I got there I had a chat with Steve there Alfa technician and he explained the problem with the aid of a photo, turned out to be both cables to the dump valve solenoids only being pushed in but not locked! ... easy fix. Now the car is back to normal and unless its my imagination seems better than it ever was, forgot how fantastic the car is with full power back:rotate: Hats off to motorvogue spot on service from start to finish.

 

Good to hear that's fixed but shocking really that the factory left it like this. How old is your car and what mileage? Just so us QF owners can watch out for this.

 

On early QFs the cable to the dump solenoids were reported to be too tight causing the sensors not to engage fully. I believe these were rectified on later cars with longer cables.

It was suspected that some of the forum cars that had check engine issues was caused by this but never truly established partly due to poor dealer knowledge, especially if anyone remembers Brooking's Qf..also some press cars that developed check engine when pushed.

I doubt it left the factory like that if you have been driving the car ok. Without the dump solenoids connected there will be an immediate error as soon as the turbo tries to dump boost on throttle off or boost demand off. More likely it was either not pushed in fully or it came loose, unless yours is an early QF and the cables were too tight in the first place.

Glad the tech knew the issue and sorted quickly.

 

I actually had this exact same fault the other day. Attached is a screen shot from MES. I tested, then reset CELL then pushed in the plugs and ensured not too much tension in the loom (its a pretty tight fitment) and to date no more issues. The Turbo Vacuum valves are very accessible, nothing needs to be removed to access the plugs. The actual MES diagnostic advise is to check wiring etc so this must be a known issue.

 

Hi Macca993, how do you get to the Valves ? I would like to have a look myself ..

 

Hi there. See diagram below item 6. Very visible under the intake runners.

 

Slightly off topic as it didn't show the P026e code, but I've had exactly the same symptoms 2-3 times over the last 5-6 weeks.

Car would start and run fine and then it would display CEL during driving and Stop/Start & DNA would be disabled.
It would then clear after 5-6 restarts.

Spent ~4 hours at the garage on Thursday while they ran battery tests and turns out I have a failing/dud battery.
Just waiting for a replacement and should be up and running again this weekend.

 

I had a fault code relating to the charge cooler pump circuit back last year that came and went, Once the garages were open a software update fixed it.

 

How long did the update take?

 

I'm not sure, I left it with them for the day.

 

Mine has just developed the CEL, couldn't write it. 🤣 It's like the car knows I have been reading about the issue or knows it's going back for px in a few months. Did they give you a courtesy? I may need to drop mine in.

 

Hmmm, I bet software updates aren't covered by my 3rd party warranty. I'm also getting "U1008-00 LIN Serial Line" error. Has anybody got any experience of Autoprotect sold with 2nd hand cars by Thames Alfa in Slough? I bought it from them but it's a 400 mile round trip and there's an approved Alfa workshop (formerly Swansway Chester) around the corner from where i work. The claim items seem to exclude electrical and wiring loom failures.

 

Don't worry too much about the U errors which are for comms and the car does register a few of them without issues.

 

Sods law posting on this thread mine threw another one up yesterday.
I parked up and switched off and the cooling fan came on full speed and showed
U1008-00
P2510-00 power supply(+15)
Cleared it with multiscan and hasnt come back.

 

Should rename this the "jinx thread"

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Definitely I agree, never had any issue's til I read this thread, I started mine again this morning, taking it out of the garage, still had the CEL light and message , a-s/s not working, stuck in N mode. Stopped it, outside my garage, turned it off, locked the garage, started it again and the CEL cleared, a-s/s working, full dna modes again. I did get it read by a friend, had the code P26E4, which search the Giulia forum's it's a fault on one of the engine start relays. I will get it checked by the dealer, but hopefully just a glitch and the issue won't return.

 

Engine management glitches weren't a big issue until they decided to make them MOT failures. CELs don't always make a car unroadworthy, especially if in this case all I need is a software update. I can understand emission issues that go with certain CEL's, but I thought that's what the MOT emissions test is for. I now have 2 cars with intermittent CEL; my Giulietta and Giulia which will need sorting before MOT time. The 15yr old brera and 21yr old 145 however are fine thankfully. Less complicated I suppose.

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Give me strength! After 4 months and about 2k miles of fault free driving, the P026e is back. I've got a warranty until October, but it still means a 400 mile round journey to the supplying dealer. I need to make sure they know how to solve this before taking it there as I can't just pop it across several times for them to try different things. A flippin' nuisance. I did ask them to update ALL software before I bought it which they said they did, but who really knows.

 

You could take it to a local dealer and it should still be done under warranty.

 

I recently had new modified connectors fitted to mine to stop recurring CEL light

 

Interesting! Is that for a QV though?

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Yes. The 2.0 does not have this issue.

 

Post intercooler temps high (FIXED)

spoiler : Post #33 by beta was right and that fixed my issue Hey guys I have a 17 q4 and once in a while I’ve noticed that my post intercooler temps getting hotter than usual. I use the squadra dongle to see them and confirmed yesterday with MES that they are high. Or the sensor is reading...

www.giuliaforums.com

This is the thread, lots of very good info. Pay attention to my post near the end, the relays aren't always in the same location. I initially changed out the wrong relay. Once I'd located the correct one, look for the colour of the wire in the loom, white and violet, it sorted the issue.

 

Brilliant -Thanks for that info. That's very helpful. I phoned the dealer the other and they told me a software update was required which wouldn't be covered under the warranty, but I didn't mention the other code which I forgot about (doesn't help that my copy of MES has stopped working after a Windows update!). Maybe the software parameters are too sensitive for the relay and hence needs the update as well or did your rear defroster stop working proving that the relay is bad?

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It was an intermittent fault with the relay, not had chance to use the rear defrost due to how warm it has been. I was consistently getting the U1008 code though. I'd clear it and within 50 miles it would log it again. Since replacing the relay I haven't had that code again in 4 to 500 miles. Plus, and this may not be related, the fans aren't running as high after stopping the engine. They still run up but previously they would instantly run up to max speed as soon as I turned the car off.

 

Well it looks easy enough to swap so harm in trying I suppose. Maybe this will clear that code and the software update will clear the other P code.

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Well I've swapped the pump relay with the rear window defroster. It's easy to unplug from above in the engine bay, but once your hand is in the gap it's impossible to see what you're doing so had to go through the wheel arch to plug the other one back in. It's seems a big coincidence to have 2 codes relating to this pump with 2 different causes so I'm wondering if this software update just "hides" a weakness in the relay. Makes you wonder if the rear window relay of the same type is contributing to the problems many have had (myself included) with the rear window not defrosting meaning it's not all battery related. In which case have I just swapped bad for bad?! Right, need to get MES working to clear some codes.

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With regards to the rear defrost, that is either on or off, the intercooler pump I believe will be switched on and off constantly to manage intercooler temps. Most relay failures are caused by overuse, everytime the relay is energised, as the contacts close or open it will arch which leads to carbon build up on the contact tips. So I think for the defrost function, that relay is probably fine.

 

Just been swapped cars around in the driveway. Giulia had been running no more than 3 minutes from a cold start, but the fans continued to run for about 5mins after switching the engine off. That's the first time I've ever heard it do this. I've just fitted a new AGM battery so don't know if it's something to do with the relay swap or the new battery. I'm not particularly concerned, but it just took me by surprise. No sign of coolant related codes as yet, but plenty of other faults instead, but that's another story on another post! Needless to say I'll be taking my uncomplicated 21yr old 145 to work tomorrow, whilst my 4yr old giulia sits it the driveway having electronic tantrems [emoji2959]

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Mmmm…. 145 … lost mine , caught fire . Have Giulia QV but miss the 145 so much

 

Yeah I saw your post. Gutted for you. Such a shame and a very rare colour. Here's mine. I won't turn this into a 145 thread, but I find it more fun on short journeys around the twisties than the giulia (long distance is an other matter). It's also allowed to throw a wobbly due to its age and the fact that it cost me peanuts a few years back, but the giulia is disappointing me at the moment and I'm a little worried about it's longevity. Oh well I'm sure when it's all sorted I'll love it again.

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