C0220

The C0220 diagnostic trouble code means the chassis control module has identified a park brake switch circuit malfunction problem. This code relates to a chassis sensor providing incorrect or missing data to the control module. Chassis sensor issues can affect braking, steering, and stability control performance. 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: Cruise control not functioning. Poor engine performance. Erratic gauge readings on dashboard. Speedometer reading incorrectly. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Sensor out of calibration. Faulty PCM/ECM not reading sensor correctly. Water intrusion in sensor connector. Open or shorted sensor wiring. 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 trouble codes and freeze frame data. Locate the specific sensor referenced by the code. Inspect the sensor connector for corrosion, damage, or loose pins. Test the sensor output using a multimeter or scan tool live data. Check the wiring between the sensor and the PCM for opens or shorts. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

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