The most common causes of P1AAF include: Battery management system (BMS) malfunction; High voltage battery cell imbalance; Battery temperature sensor fault; High voltage contactor failure. A professional OBD-II scan tool is recommended for accurate diagnosis.

How do I fix P1AAF for Hyundai IONIQ 5?

Recommended steps to address P1AAF: (1) Schedule service as soon as possible (2) Reduce driving speed and avoid long trips (3) Monitor for additional warning messages (4) Have the vehicle diagnosed by a certified technician. Always consult a qualified EV technician for high-voltage system repairs.

Is it safe to drive with P1AAF?

Driving with P1AAF is not recommended for extended distances. Schedule service within a few days to prevent further damage. Monitor for any additional warning lights.

Hyundai IONIQ 5

P1AAF

Warning

High Voltage Battery Ground Fault

Severity

Warning

What does P1AAF mean?

Fault code P1AAF means "High Voltage Battery Ground Fault". This is a Hyundai-specific EV diagnostic trouble code for the Hyundai E-GMP platform. It is classified as "battery" with a severity level of "warning". Applicable models: IONIQ 5, IONIQ 6, Kia EV6.

Possible Causes

Battery management system (BMS) malfunction
High voltage battery cell imbalance
Battery temperature sensor fault
High voltage contactor failure

Recommended Actions

1 Schedule service as soon as possible
2 Reduce driving speed and avoid long trips
3 Monitor for additional warning messages
4 Have the vehicle diagnosed by a certified technician

This code applies to all vehicles. View generic P1AAF information →