Question

ODB error code P3191 - Toyota Prius 2001 - What is the frequent problem?

it also gives P0171 - system too lean -code

Answer 1

Hi there,

Here is a list of possible causes for a P3191 code. 

P3191 TOYOTA - Engine Does Not Start

Read more: https://www.autocodes.com/p3191_toyota.html

And here is a list of possible causes for an Air/fuel too lean code.

P0171 TOYOTA - Air/Fuel Mixture System Lean Bank 1

Read more: https://www.autocodes.com/p0171_toyota.html