How can i tell what is the realpossible cause of p0171? I have a 2007 camry.

Question

I have a 2007 camry and the engine light came on and got a code of p0171 how do i repair this code?

Answer 1

P0171 Fuel trim lean bank 1

This is a lean running code here are some possible reason,Vacuum leak,MAF (mass air flow ) under reporting,fuel pressure low,injector blockage,PCV valve and hose,Airflow sensor sparkplug worn out,,The engine wears over time,and there are changes in operating enviroment. The ECM tries to compenstate for the changes and when it reaches its upper limit .Check engine light appears.