Question

2009 Mazda Mazda3 1.6L with engine code P2187, what is the code?

Answer 1

HI there

This code indicates the fuel system is to lean on the engine. This can be the result of several things including fuel pressure or intake manifold gasket leaks, as well as the mass air flow sensor or a faulty front O2 sensor. Here is some more info on it for you.

P2187 MAZDA - System Too Lean At Idle Bank 1
Read more: https://www.autocodes.com/p2187_mazda.html