100% Free

No Scanner Needed

Carly logo
Prices

sinahuber1

Mercedes GLE Hybrid High Voltage Error

My 2017 Mercedes GLE Hybrid is giving me a high-voltage system error and the engine shuts off sometimes. I'm also feeling reduced engine power. Could it be a battery issue?

Summary of the thread

A 2017 Mercedes GLE Hybrid was experiencing a high-voltage system error, causing the engine to shut off and reduced power. The issue was suspected to be related to the high-voltage battery, but it was suggested that the 12V auxiliary battery could also be the cause. After checking, it was found that the 12V battery was faulty, and replacing it resolved the problem.

Did this summary help you solve your problem?

4 comment(s)

TheRider

I understand your concern. Similar symptoms happened with a 2019 Volvo XC90 T8 I worked on. It had a depleted high-voltage battery and a faulty charging module. Has the car had a diagnostic scan to check the fault codes? Also, have you checked the 12V auxiliary battery? A bad one can cause errors in the high-voltage system.

sinahuber1 (community.author)

Thanks, a scan pointed to the high-voltage battery. I haven't checked the 12V auxiliary battery yet. Could a weak auxiliary battery really cause a high-voltage system error? I thought they were separate.

TheRider

Yes. The 12V auxiliary system often helps the high-voltage system work. A low charge or problem with the 12V battery can cause wrong codes and issues in the high-voltage system. I still suggest a certified hybrid technician check it out.

sinahuber1 (community.author)

Thank you for the advice. I had the 12V battery checked, and it was bad, causing problems with the high-voltage system. Replacing it fixed everything. The cost was 290€, which is much better than I expected.

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

MERCEDES

community_crosslink_rmh_model

GLE