B0137

The B0137 diagnostic trouble code indicates that the body control module has identified a liftgate/trunk ajar switch circuit malfunction issue. This code means a body sensor or its circuit is not providing expected readings. Accurate sensor data is important for proper operation of safety and convenience systems throughout the vehicle. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: Seat occupancy sensor showing incorrect status. Door ajar warning when doors are closed. Airbag warning light on. Temperature sensor reading inaccurately. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Sensor out of calibration. Damaged sensor wiring or connector. Sensor contamination or physical damage. Seat weight sensor pad worn or damaged. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Connect an OBD-II scanner and read all stored body control module trouble codes. Inspect the affected sensor and its wiring connector for damage or corrosion. Test the sensor resistance or voltage output with a multimeter. Check for physical obstructions, contamination, or misalignment of the sensor. Verify sensor calibration using scan tool where applicable. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Body (B) collection on OBD Codes. We provide comprehensive, up-to-date information to help you find solutions quickly.