alfred_taylor95
Ioniq Battery Sensor Issue
Summary of the thread
A 2020 Hyundai Ioniq electric vehicle exhibited symptoms of a heavily discharged battery, including error messages, weak or flickering lights, and starting issues. The suspected cause was a defective battery sensor, confirmed by an error code P1A04 indicating a fault in the battery sensor circuit. After consulting with others who had similar experiences, it was recommended to have the vehicle inspected by a qualified technician. The inspection confirmed the defective sensor, and replacing it resolved the issue.
Did this summary help you solve your problem?
4 comment(s)
alfred_taylor95 (community.author)
The error code is P1A04, indicating a fault in the battery sensor circuit. Current draw seems normal when measured directly at the battery terminals, but the sensor readings are erratic. Did you also suspect the sensor in your Jaguar?
linda_fire2
Yeah, the dealer initially suspected the sensor and replaced it, but the issue persisted. Turned out to be a faulty battery management module in the end. If you're getting erratic readings, I'd definitely get it checked by a qualified technician. Given the symptoms, it could be more complex than just the sensor itself. Best to take it to a workshop.
alfred_taylor95 (community.author)
Following your recommendation, I had the vehicle inspected at a certified workshop. The defective battery sensor was confirmed, and after replacement, the issue was resolved. The total repair cost was 315€. Your experience was invaluable in guiding the troubleshooting process.
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
HYUNDAI
community_crosslink_rmh_model
IONIQ
linda_fire2
That sounds frustrating. I had a similar problem with my 2018 Jaguar I-Pace. 'Error message in the speedometer' and 'weak battery when starting' sound very familiar. My battery never got that discharged, but the lights were definitely weaker sometimes. What error code are you getting? Is it drawing excessive current?