P1170 Port Injector Fuel Performance
What does P1170 mean on a Toyota?
P1170 — Port Injector Fuel Performance. This Toyota-enhanced code applies to Toyota models with D-4S port and direct injection.
Common causes of P1170
- Clogged port injectors
- Low fuel pressure to the port rail
- Failing port injector driver
- Contaminated fuel
- Wiring fault
How to fix P1170
- Check fuel pressure at the port rail
- Compare port injector balance rates
- Service clogged injectors
- Test driver circuits
- Replace faulty injectors per balance tests