P1604Startability malfunction (hard or long start)
- Toyota/Lexus code · Engine
- Turns on the check-engine light
- How the car detects it
- The engine computer noticed that the engine took too long to start or did not start properly. It is a symptom code: look at other codes stored with it. Toyota has linked it to carbon build-up in the combustion chambers on the 2012-2013 iQ and to a fuel-quality learning error on flex-fuel V8 engines.
- What you may notice
- Check-engine light
- Long cranking before the engine starts
- Likely causes
- PossibleFuel supply problem (pressure, pump, injectors)
- PossibleAir leak or dirty throttle body
- RareCarbon build-up in the engine
- Sources
- static.nhtsa.gov › MC-10132332-9999.pdf · official document
- static.nhtsa.gov › MC-10132874-9999.pdf · official document
- toyota-club.net › ems_2zrfe.htm
- toyota-club.net › ems_1nzfxe.htm
Backed by an official manufacturer document.
From Obdaryn's Toyota/Lexus pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.