C0021 - Brake Booster Performance
C0021 is a generic chassis diagnostic trouble code indicating Brake Booster Performance. It relates to the System-Specific system.
DTC Breakdown (SAE J2012)
| System | Chassis (C) |
| Type | Generic |
| Subsystem | System-Specific |
| Fault Index | 21 |
| Standard | SAE J2012 / ISO 15031-6 |
What does diagnostic code C0021 mean?
The dtc/">diagnostic trouble code C0021 represents Brake Booster Performance. This standard generic code points to a monitored fault condition in the vehicle's Chassis network.
Detailed diagnostic guides and specific fix procedures for code C0021 are currently being compiled. Always verify check engine warnings with a qualified mechanic.
Frequently Asked Questions about C0021
What does C0021 mean?
The diagnostic trouble code C0021 represents Brake Booster Performance. This standard generic code points to a monitored fault condition in the vehicle's Chassis network.
What is the system for C0021?
The C0021 code is located in the vehicle's Chassis network.