linda_light1
Grandeur Hybrid Overheating and Coolant Spill
Summary of the thread
A 2023 Hyundai Grandeur hybrid experienced engine overheating, a check engine light, and coolant spillage, suspected to be due to a control unit communication error, possibly from a defective cable or plug. The issue was intermittent, and after checking the wiring, it was advised to have the vehicle inspected professionally to prevent further damage. The problem was confirmed to be a faulty plug on the control unit, which was repaired for 95€.
Did this summary help you solve your problem?
4 comment(s)
linda_light1 (community.author)
Intermittent, yes. The wiring appears fine. Anything specific I should be looking for? Any specific component or control module known for this?
kevinbeck4
Could be a control module. From my experience if the symptoms are overheating + coolant loss together with control unit message, it’s safer to get it checked at a workshop. Don't risk further damage.
linda_light1 (community.author)
Thanks. Took it in. Turned out to be a faulty plug on the control unit, as suspected. 95€ repair. Appreciate the input.
rmh_community_comment_box_header
Want to read your vehicle data yourself?
Order the Carly Scanner and always keep an eye on all important information about your vehicle.
Carly Universal Scanner
starting from
Not your vehicle?
Find maintenance and repair costs for your vehicle.
Carly repair costs
How much will my repair cost?
community_crosslink_rmh_brand
HYUNDAI
community_crosslink_rmh_model
GRANDEUR
kevinbeck4
Sounds like a software glitch causing a communication fault. Is it intermittent? I had something similar in an older car, also a connectivity issue. You checked the obvious wiring, yeah?