Subaru 1984 – 1986 Fuel injected models DTC 21 – Seized airflow meter flap
DTC 21 meaning on Subaru 1984 – 1986 Fuel injected models
DTC 21 indicates a seized airflow meter flap on Subaru 1984 – 1986 Fuel injected models.
Subaru 1984 – 1986 Fuel injected models DTC 21 symptoms
- Check Engine Light (CEL) illuminated
- Engine may run rough or stall
- Reduced engine performance
Subaru 1984 – 1986 Fuel injected models DTC 21 causes
- Build-up of dirt or debris causing the airflow meter flap to seize
- Worn out airflow meter components
Subaru 1984 – 1986 Fuel injected models DTC 21 seriousness
The seriousness of DTC 21 lies in its potential to affect engine performance and fuel efficiency. Ignoring this issue can lead to further damage to engine components.
How to diagnose DTC 21 on Subaru 1984 – 1986 Fuel injected models
- Use an OBD-II scanner to retrieve the trouble code
- Inspect the airflow meter for any visible signs of dirt or debris
- Check the airflow meter flap for smooth operation
How to fix DTC 21 on Subaru 1984 – 1986 Fuel injected models
- Clean the airflow meter and flap to remove any obstructions
- Lubricate the airflow meter components for smooth operation
- If necessary, replace the airflow meter assembly
How to erase DTC 21 on Subaru 1984 – 1986 Fuel injected models
To clear DTC 21, use an OBD-II scanner to reset the trouble code after addressing the underlying issue with the airflow meter flap.