Conditions for Setting the DTC: P0121

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The TP sensor 1 disagrees greater than 9 percent from TP sensor 2.
The TP sensor 1 disagrees greater than 9 percent from the predicted value.
The above conditions are met for greater than 4 seconds.