2005 mazda 3 2188 code

Question

I have changed purge solenoid vale, mass airflow sensor, and upstream o2 sensor. What else can I look for.

Answer 1

P2188 Fuel trim too rich at idle

There is a TSB for this it is about poor connection between the terminal and harness at the airflow sensor, what you will do is improve the MAF (mass air flow) ground by splicing into it .and attatching it to a good ground TSB 01 - 006/06.