Hi Everyone,

Trying to get a feel for what might be wrong here before I book it into a garage.

Last week, my 2021 L&K iV popped a yellow triangle with a Hybrid system failure warning. Oddly, turning the car off and back on cleared it - for the first 3-4 days, and now it will go away if I'm lucky, but not always.

The car still drives on pure EV mode anyway though.

I checked the codes this morning, and there are 3 - all for Temp sensor issues, one for an air intake, one for the turbo and one for the Hybrid (P2D2B was the code for that one). All temp sensors - all saying reading high/low.

I think its unlikely 3 separate things have broken at once, so I'm guessing there's a common element in play - either a single sensor chip does all of them and its broken, or they are all wired somehow together and there's a break or bad connection.

Does that sound about right? Anyone got any thoughts please?

Thanks!

Update:

Battery swap (coded) and a clear of fault codes has helped somewhat. Now, only the Hybrid Coolant Temp sensor error remains.

Went to a VAG specialist garage today, and they've told me the sensor is in the coolant tube and they can't fix it - main dealer is their recommendation. Not ideal!

Good that you’ve got a partial clearance. No experience on the iV side of things but sounds like if the specialist is pointing to a main dealer it’s probably quite intricate.

Keep the thread updated though - hopefully someone can help!

On 20/02/2026 at 21:56, travs said:

Good that you’ve got a partial clearance. No experience on the iV side of things but sounds like if the specialist is pointing to a main dealer it’s probably quite intricate.

Keep the thread updated though - hopefully someone can help!

Just saw a very similar post on the facebook superb iV group, and someone replied that they had this, and Skoda wanted £2300 to replace the pipe that has the sensor it in! He got it done elsewhere for £1300.

I'm thinking - is this really that important? As long as coolant is pumping, in that tiny battery pack - that's enough surely for a car that's already done 130k miles.

My Nissan Leaf is a pure EV and that doesn't even have a battery coolant system at all! Nevermind a temperature controlled one.

Is this a crazy idea? Just code it out?

16 minutes ago, petertr said:

Just saw a very similar post on the facebook superb iV group, and someone replied that they had this, and Skoda wanted £2300 to replace the pipe that has the sensor it in! He got it done elsewhere for £1300.

I'm thinking - is this really that important? As long as coolant is pumping, in that tiny battery pack - that's enough surely for a car that's already done 130k miles.

My Nissan Leaf is a pure EV and that doesn't even have a battery coolant system at all! Nevermind a temperature controlled one.

Is this a crazy idea? Just code it out?

Sheesh - my spider sense errs on the side of caution there. It’s not illogical but there could be a myriad of factors differing your two cars which means one doesn’t need a cooling system and one could benefit from it.

But that’s as much my inexperience as anything.

Final update (hopefully) to close the loop on this.

Root cause: Coolant matrix failed and leaked AirCon gas into the EV Coolant Fluid.

Had to replace the matrix and replace all gas & fluids to get that system right.

However the EV coolant sensor continued to report 80C, meaning it was broken - which meant stripping out that pipe and replacing it.

Had really hoped it would be a single fault, but I guess I got unlucky.

All told, came to about £2,400 at a EV specialist garage in the north east of England (won't name names or exact locations on here - but happy to answer PMs if someone needs the name).

So that wasn't fun at all. Very very costly and a major pain being without my car for 2 weeks, the very day before I started an office-based job 10 miles from home, after 10 years of working from home - typical!

That sounds stupidly expensive and 2 weeks ? Jeez what where they doing ?

1 hour ago, MP74 said:

That sounds stupidly expensive and 2 weeks ? Jeez what where they doing ?

2 complete different problems unfortunately.

Took a day to diagnose, then order the part which took 3 days to come. Then it was fitted and tested - which worked, but didn't clear the fault.

So had to strip the rear end, to get into the guts of the traction battery system, see if it could be fixed - couldn't - ordered another part, fitted.

But yeah, was doubly frustrating. Imagine it would have cost more at a dealers, although might have been quicker.