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mariebraun75

Mondeo Hybrid High Voltage Error

My 2017 Ford Mondeo hybrid is throwing a high-voltage system error. Engine shuts off randomly, power is severely reduced and the error is stored. Mileage is at 130544 km. I'm thinking it's the battery, anyone else had this?

Summary of the thread

A 2017 Ford Mondeo hybrid is experiencing a high-voltage system error, causing the engine to shut off randomly and reducing power. The issue is suspected to be related to the battery. A similar problem was resolved by checking the voltage sensor, which was suggested as a potential cause. Ultimately, the problem was identified as a heavily discharged hybrid battery due to a faulty cell, and the voltage sensor was also replaced, resolving the issue.

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4 comment(s)

miatiger10

Sounds familiar. I had a similar issue with my Mondeo (not the hybrid though) a while back. Kept getting battery warnings and the car felt like it was running on fumes. Have you checked the voltage sensor? That was my problem.

mariebraun75 (community.author)

Voltage sensor, huh? Where is that located exactly, and how would I go about checking it? I'm not super tech-savvy but willing to give it a shot before throwing money at it.

miatiger10

Honestly, I'm not entirely sure where it's located on the hybrid. I just know that's what the workshop guys told me was causing the battery drain. If you're not comfortable poking around, I'd strongly suggest taking it to a professional. Could save you a bigger headache and potentially a larger bill down the road.

mariebraun75 (community.author)

Yeah, you're probably right. Bit the bullet and took it in. Turns out the hybrid battery was heavily discharged, likely due to a faulty cell. Repair cost me 290€, they also replaced the voltage sensor. Thanks for the nudge in the right direction!

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FORD

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MONDEO