The P1696 code indicates that there is a mismatch between the immobilizer key and the vehicle's security system. The immobilizer system is designed to prevent the engine from starting unless a valid key is used. When the key is not recognized or mismatched, the engine will not start, and the vehicle may be immobilized.

One possible fault code you might encounter is P1696. This code indicates a problem with the Smart key ECM, which can lead to the engine light being illuminated. To fix this issue, start by visually inspecting the wiring harness and connectors for any damage. Look out for broken, bent, pushed out, or corroded pins on the connectors.

2019年9月10日 · Repair Information for P1696 Hyundai code. Learn what Immobilizer Key Mismatched means, location and how to repair?

The P1696 Hyundai code indicates that there is a mismatch between the immobilizer key and the vehicle's security system. The immobilizer system is designed to prevent unauthorized access to the vehicle by requiring a specific key to start the engine.

2024年3月8日 · In this video I show you how to test and fix the immobilizer system when there is P1696 Immobilizer Key Mismatched fault code.#immobilizer #p1696#transponde...

2018年7月30日 · A p1696 is a fault in the PCM and according to google could be an emissions problem. The truck stalls on startup and occasionally while driving. I replaced the PCV valve (after googling possible issues) which helped a little.

18104/P1696/005782 - Powertrain Data Bus: Implausible Message from Steering Column Controller Possible Causes. Steering Column Control Module may have stored a Fault Code; Steering Column Stalk/Lever faulty; Possible Solutions. Check Steering Column Control Module for Fault Codes; Check/Replace Steering Column Stalk/Lever; Special Notes

2025年1月19日 · When the P1696 code is related to an immobilizer issue, it means the key’s transponder chip is not being recognized by the vehicle’s security system. This can be due to a faulty transponder in the key, a problem with the immobilizer antenna around the ignition switch, or a malfunction in the immobilizer control module.

2019年9月10日 · How to Fix the DTC P1696? Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins …

总结来说，针对汽车故障代码p1696，可能需要依次进行线路排查、发电机更换、蓄电池传感器更换、网关控制单元及发动机控制单元更换等多个环节。 在进行这些维修操作时，强烈建议寻求专业汽车技术人员的协助，以保障维修品质及行车安全。