P1696Key authentication failed

• Hyundai/Kia code · Engine

How the car detects it

The immobilizer (SMARTRA) checks the chip in the key before the engine computer allows a start. The key was read but not accepted: it isn't taught to this car, or its transponder is faulty. Applies to cars with an immobilizer.

What you may notice

• Cranks but won't start, or starts only sometimes

Likely causes

• LikelyKey not taught to this car
• PossibleFaulty key transponder

Sources

• manuals.autorepairshq.com › General Information
• youcanic.com › hyundai-fault-code-dtc
• elektroda.com › topic3204706.html

Backed by at least two independent sources.

From Obdaryn's Hyundai/Kia pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.