Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

A current DTC clears when the malfunction is no longer present.
A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Fig 1: DTC B1440 (Steps 1-6)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC B1440 (Steps 7-14)

Courtesy of GENERAL MOTORS CORP.