P03B2
Cylinder 3 Combustion Performance
Generic OBD-II
Common symptoms
What you'll notice
- Perform a compression test to check for any issues with the cylinder's compression
- Check the fuel injector for any clogs or leaks
- Inspect the spark plug and replace if necessary
- Clean or replace the mass air flow sensor
- Check the ignition coil for any faults and replace if needed
Common causes
Most likely first
- Spark plug failure in cylinder 3
- Ignition coil malfunction in cylinder 3
- Fuel injector issue in cylinder 3
- Low compression in cylinder 3
- Incorrect fuel mixture in cylinder 3
How to diagnose & fix
Work through it in order
- Misfiring or rough idle
- Loss of power or acceleration
- Increased fuel consumption
- Engine hesitation or stumbling
- Check engine light illuminating
Read & clear P03B2 yourself
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