1995 Lexus ES300 P0170 Code

Question

1995 Lexus ES300.  the check engine light came on and in diagnosing the problem, I got back a P0170 Engine Code, Fuel system too rich or too lean (Bank 1).  I reset the code and after about 20 or thirty miles the check engine light came back on.  Curious what the problem might be.  Any recommendation

Answer 1

Hi there

This is usually the result of a faulty front O2 sensor. It's usually causing the fuel trim to be off. It can also be the result of an intake air leak or a leaking fuel injector.

P0170 - Fuel Trim Malfunction Bank 1

Read more: https://www.autocodes.com/p0170.html