The most common causes of P1B71 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 P1B71 for Kia EV6?

Recommended steps to address P1B71: (1) Stop driving immediately and park in a safe location (2) Do not attempt to restart the vehicle (3) Contact roadside assistance or authorized dealer (4) Have the vehicle towed to an authorized service center. Always consult a qualified EV technician for high-voltage system repairs.

Is it safe to drive with P1B71?

No. P1B71 is a critical fault code indicating an immediate safety risk. Stop driving as soon as safely possible and contact roadside assistance or an authorized service center.

Kia EV6

P1B71

Critical

High Voltage Battery Voltage Too High

Severity

Critical

What does P1B71 mean?

Fault code P1B71 means "High Voltage Battery Voltage Too High". 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 "critical". Applicable models: IONIQ 5, IONIQ 6, Kia EV6, GV60, EV9.

Possible Causes

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

Recommended Actions

1 Stop driving immediately and park in a safe location
2 Do not attempt to restart the vehicle
3 Contact roadside assistance or authorized dealer
4 Have the vehicle towed to an authorized service center

This is a critical fault code. Pull over safely and seek immediate professional assistance.

This code applies to all vehicles. View generic P1B71 information →