P026C
Fuel Injection Quantity A Lower Than Expected
Generic OBD-II
Common symptoms
What you'll notice
- Check the fuel injectors for clogging or blockage
- Clean the fuel injectors thoroughly to improve fuel flow
- Inspect the fuel pressure regulator and replace if necessary
- Check for any vacuum leaks and repair them
- Test and possibly replace the fuel pump if it is not delivering enough fuel
Common causes
Most likely first
- Clogged fuel injectors
- Faulty fuel pressure regulator
- Malfunctioning fuel pump
- Dirty or clogged fuel filter
- Air intake system leak
How to diagnose & fix
Work through it in order
- Engine misfires or stumbles
- Decreased engine power and acceleration
- Poor fuel efficiency
- Rough idling or stalling
- Increased exhaust emissions
Read & clear P026C yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.