Question

2007 Buick Ranier with engine code P1400, what is the meaning of the code?

Answer 1

P1400 Cold start emission reduction control system

This is for a cold start strategy in warming up the catalytic to aid in the reduction of emission during cold start up. This code condition appear when the RPM for cold start up is not elevated, This can be due to dirty air filter or a contaminated MAF (mass airflow) Perform a throttle body and a MAF cleaning and if need be replace the air filter.

Answer 2

P1400 BUICK Code - Cold Start Emission Reduction Control System

Read more: https://www.autocodes.com/p1400_buick.html