matthiashunter1
Auris Overheating Bypass Valve Issue
Summary of the thread
A 2012 Toyota Auris hybrid was experiencing engine overheating and an error related to the bypass valve. The issue was suspected to be linked to the vacuum system or exhaust, but a faulty coolant temperature sensor was identified as the root cause. Replacing the sensor resolved the overheating and error issues, restoring normal function.
Did this summary help you solve your problem?
4 comment(s)
matthiashunter1 (community.author)
The overheating seems to occur mostly during longer drives, especially at higher speeds. Fuel efficiency has definitely taken a hit. Which sensor was causing the issue on your Auris? Was it directly related to the bypass valve, or something else entirely?
alinataylor5
Ah, longer drives at higher speeds... sounds familiar. In my case, it was the coolant temperature sensor giving false readings, which then messed with the bypass valve and a bunch of other things. It's like a domino effect. I'd suggest getting it checked out by a workshop. They'll be able to pinpoint the exact cause much faster.
matthiashunter1 (community.author)
Thanks for the insight! Took it to the shop, and you were spot on – faulty coolant temperature sensor. It was indeed causing a cascade of errors. Replaced the sensor, and everything's back to normal. Repair cost was 0€ as it was covered by warranty. Appreciate the help!
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
TOYOTA
community_crosslink_rmh_model
AURIS
alinataylor5
Interesting. I had a similar scare with my Auris (not sure about the year), and it turned out to be a faulty sensor causing mayhem. Is the engine overheating consistently, or only under certain conditions? What kind of fuel efficiency are you getting?