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richardhoffmann1

Verso AC undervoltage error

Seriously frustrated with my 2011 Toyota Verso diesel. The air conditioning system has completely given up. It doesn't switch on, and no cooling. My diagnostic tool is throwing an undervoltage error code. Has anyone else experienced this? It's only done 71557 km.

Summary of the thread

A 2011 Toyota Verso diesel is experiencing a complete failure of the air conditioning system, with a diagnostic tool indicating an undervoltage error. Possible causes include refrigerant leaks, faulty relay switches, or a malfunctioning A/C compressor. The solution involved taking the vehicle to a mechanic, who identified the issue as a faulty A/C compressor and wiring problems related to the undervoltage, leading to a successful repair.

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4 comment(s)

lisakaiser99

I had a similar problem with my Verso, though mine is a petrol engine. Same symptoms, A/C just quit. Did you check for refrigerant leaks? That's often the first thing to go. Also, have you had any electrical work done recently that might be related?

richardhoffmann1 (community.author)

Good shout. I hadn't considered a refrigerant leak, I'll check that out. I've also been looking at the relay switch. Was it a leak in your case then? Or was it something else? It’s just odd that it's throwing an undervoltage error…

lisakaiser99

For me it was something else. I booked it in with a trusted mechanic, as I was getting nowhere fast myself. Turned out to be a faulty A/C compressor, after they checked all the usual suspects like refrigerant and the relay. Given the error code you mentioned, it might be best to take it to a workshop and get it properly diagnosed.

richardhoffmann1 (community.author)

Okay, thanks for the advice! I followed your suggestion and took it to my local garage. They ran a proper diagnostic and it turns out it was indeed the A/C compressor, along with some wiring issues due to the undervoltage. Cost me 240€ to get sorted. Cheers for pointing me in the right direction!

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TOYOTA

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VERSO