C0021 Dodge code can be caused by a faulty brake booster or vacuum pressure sensor.

C0021 Dodge Code – Brake Booster Performance

The C0021 Dodge Code is a diagnostic trouble code (DTC) that indicates a possible failure in the performance of the brake booster. This code can be caused by a variety of issues, ranging from a faulty brake booster to a wiring harness issue. It is important to diagnose and fix the issue as soon as …

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