C2021
Tire 1 Air Pressure Decrease
C2021 is an OBD-II diagnostic trouble code meaning: Tire 1 Air Pressure Decrease. Common causes: tire puncture or damage, natural air leak. Estimated repair cost: $6–56.
Symptoms
- Tire pressure indicator lights up
- Reduced vehicle controllability
- Increased noise when driving
Causes
- Tire puncture or damage
- Natural air leak
- Pressure sensor (TPMS) fault
- Tire valve damage
How to Fix
- Check the pressure in tire 1 using a pressure gauge
- Inspect the tire for damage or punctures
- If necessary, inflate the tire to the recommended pressure.
- If damage is found, repair or replace the tire
- Check the operation of the TPMS sensor if necessary
Related codes
FAQ
What does the C2021 code mean?
C2021 is an OBD-II diagnostic trouble code that indicates: Tire 1 Air Pressure Decrease
What causes a C2021 error code?
The most common causes of C2021 include: Tire puncture or damage; Natural air leak; Pressure sensor (TPMS) fault; Tire valve damage.
How do I fix a C2021 diagnostic trouble code?
To fix C2021: Check the pressure in tire 1 using a pressure gauge. Inspect the tire for damage or punctures. If necessary, inflate the tire to the recommended pressure.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C2021?
Limited driving only, diagnose soon
How much does it cost to fix C2021?
The estimated repair cost for C2021 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat