C1021
ABS Booster Control Pressure Signal Amplitude
C1021 is an OBD-II diagnostic trouble code meaning: ABS Booster Control Pressure Signal Amplitude. Common causes: pressure sensor malfunction, wiring harness damage. Estimated repair cost: $56–167.
Symptoms
- ABS light is on
- Reduced braking performance
- Unstable ABS operation
Causes
- Pressure sensor malfunction
- Wiring harness damage
- Problems with the ABS control unit
- Leaks in the brake system
How to Fix
- Check the pressure sensor and its connections
- Inspect the wiring harness for damage
- Check ABS control unit
- Repair leaks in the brake system
Related codes
FAQ
What does the C1021 code mean?
C1021 is an OBD-II diagnostic trouble code that indicates: ABS Booster Control Pressure Signal Amplitude
What causes a C1021 error code?
The most common causes of C1021 include: Pressure sensor malfunction; Wiring harness damage; Problems with the ABS control unit; Leaks in the brake system.
How do I fix a C1021 diagnostic trouble code?
To fix C1021: Check the pressure sensor and its connections. Inspect the wiring harness for damage. Check ABS control unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C1021?
Limited driving only, diagnose soon
How much does it cost to fix C1021?
The estimated repair cost for C1021 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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