Hardware Model Specification
Hyundai EV Ioniq 5 & Ioniq 6 Diagnostics
Classification: E-GMP 800V High-Speed Architecture
Hardware operational fault codes, protection alarms, LED blink sequences, and step-by-step diagnostic fixes for the Hyundai EV Ioniq 5 & Ioniq 6.
1 Documented Faults
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Full Multimeter & Safety Isolation Procedures
Indexed Fault Codes for Ioniq 5 & Ioniq 6
Step-by-step resolution manuals and root cause matrices
CODE DTC P1A90
Severity: Critical
Difficulty: expert
ICCU Integrated Charging Control Unit Failure Fix
Hyundai Ioniq 5 and Ioniq 6 trigger DTC P1A90 accompanied by audible 'pop' from beneath the rear seats, dashboard warning 'Check Electric Vehicle System', and loss of 12V auxiliary power. Caused by internal MOSFET overcurrent thermal fatigue in the Integrated Charging Control Unit (ICCU) LDC circuit.
⏱ Dealer Recall Service / 1 Day
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