Question

2008 Pontiac Wave with code P2A01 and the check engine light is ON

Answer 1

HI there

This code is typically the result of a faulty rear O2 sensor. Here is some more info on the code.

P2A01 - O2 Sensor Circuit Range/Performance Bank 1 Sensor 2
Read more: https://www.autocodes.com/p2a01.html