What does code P1523 mean?

Q: What does code P1523 mean?

Crash Signal From Airbag Control Unit Range Performance. P1523 on Volkswagen vehicles indicates that the airbag control unit has sent a crash signal to the engine control module (ECM) that is outside the expected range or performance, meaning the ECM cannot reliably determine whether a crash event has occurred. The ECM monitors the crash signal circuit for plausible voltage or message timing, and when the signal is missing, erratic, or stuck, it logs this code and may disable certain safety-related functions.

DTC codes / Volkswagen codes / P1523

P1523 · VolkswagenCrash Signal From Airbag Control Unit Range Performance

P1523 on Volkswagen vehicles indicates that the airbag control unit has sent a crash signal to the engine control module (ECM) that is outside the expected range or performance, meaning the ECM cannot reliably determine whether a crash event has occurred. The ECM monitors the crash signal circuit for plausible voltage or message timing, and when the signal is missing, erratic, or stuck, it logs this code and may disable certain safety-related functions.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyProfessional

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.