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Discussion Starter · #1 ·
Hi V40 owners,
I have a 2016 T2 R design with approx 25000mls on clock, owned since 650 mls and yesterday experienced an engine high temp fault and told reduce speed and then to seek service assistance.
I have read lots of stories today about owners replacing lots of different components to finally find out a cylinder head gasket problem.
I have recently also had battery replacement fault and am today replacing the the battery.
Do you think these two faults are related as the voltage fluctuates the car ecu has problems reading all the sensors correctly?
 

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MY17 V40 2.0 D2 Momentum Nav + Passion Red, Winter Pack, Power Seats and TFT Display
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Hi V40 owners,
I have a 2016 T2 R design with approx 25000mls on clock, owned since 650 mls and yesterday experienced an engine high temp fault and told reduce speed and then to seek service assistance.
I have read lots of stories today about owners replacing lots of different components to finally find out a cylinder head gasket problem.
I have recently also had battery replacement fault and am today replacing the the battery.
Do you think these two faults are related as the voltage fluctuates the car ecu has problems reading all the sensors correctly?

Coolant issues normally relate to the older 1.6 D2 and to be honest is vary rare you get an issue like this with a VEA engine although there are one or two isolated stories, one recently with a T5 with the same engine which resulted in having a new engine. I would have it checked and tested by a trusted source with experience with these engines and see if you can get to the bottom of it quickly, it's no good trying to give an internet diagnosis without seeing it. It could be a faulty battery and replacing may solve the problem but If it was me I'd still get it looked at rather than just leaving in the hope a replacement battery will solve it. You've have the car for a while and you know what's normal or not. Replacement of the battery will require a system reset, I forget what excatly it is you should be resetting but there is definitely a reset of some description that is required. Regarding the coolant side of things I assume the coolant level is correct? (When cold) it could be a faulty temp sensor, it could be a faulty water pump or thermostat, all these things will need to be checked. With the T5 there was a long thread on here and I don't think they even got to the bottom of the cause but suspicion was pointing to a faulty water pump, it was changed but possibly damage occurred after it was changed this is why you need to get on top of it, something serious is normally reflected in fluctuations of coolant levels when it's hot, it's normal for it to raise a touch when it's to temperature and drop when cold but watch out for coolant drops when hot and signs of it over pressurising.

There are a few technical experts around the forum that can better advice but try and get on top of it sooner rather than later.

One other thing is the T5 was also a low mileage car, I'll see if I can find the thread and post it.

Good luck

Jason
 

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MY17 V40 2.0 D2 Momentum Nav + Passion Red, Winter Pack, Power Seats and TFT Display
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Hope it helps


 

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That was my T5 and under 30,000 miles. I'll save you reading. Cracked block was the final diagnosis, confirmed with a borescope looking through the spark plug holes. New engine required.
 

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Discussion Starter · #5 ·
I have replaced the battery and the car seems to be back to normal. I carried out a BMS reset but didn't see the battery indicator light flash three times. I took the car for a short drive to recycle the old battery( only a few few miles away) the car started normally and half way there the temp started to climb and the high temp fault appeared and also noticed no cabin warmth when turned up temp.
Looks like I need to go to see Volvo Mechanic
 

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My car had this warning come up, I thought it had spilled it’s guts with the error message that came up. Anyway, I stopped and checked coolant and all seemed fine. Engine temp stayed constant, no worries. Anyway…

2 months later and my head gasket has gone and I’m looking at a £1500 repair bill. However, my dad had a V60 D4 and the message came up once, he topped up a little coolant and it never came again. It’s hard to tell what’s up basically!
 

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Discussion Starter · #7 ·
Hi txrslanda, thanks for your input, The car is at home in garage waiting for monday @0800 for volvo garage appointment. As an aging engineer I would like to think the volvo people will be able to diagnose using VIDA to test/check all the small parts first before they change anything and at £145 per hour I hope it doesn't take too long before they have a very very good idea going forward.
Fingers crossed 🤞
 

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Don’t know where you’re based but John Holland in Sheffield have been very, very helpful and reasonable with labour costs. Volvo specialist mechanics with bags of experience at main dealers. Best of luck either way, let’s hope it’s something minor like a faulty sensor
 

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Discussion Starter · #9 ·
UPDATE,
Car went into Volvo and has been diagnosed with ' coolant pump failed. This car has an extra coolant pump fitted on the front side of the engine sometimes called EGR coolant pump and this has failed. Not a lot of info to be found and alot of money to replace including a coolant flush and new coolant, then further checks to see if there is any more damage
 

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The first diagnosis on mine was almost exactly that. They replaced it and allegedly tested it, but it overheated again as they were driving it back to me from 4 miles away.....
 
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