Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The DTC becomes history when the fault is no longer present.
A history DTC clears after 100 malfunction free ignition cycles.
The DIC receives the clear code command from the scan tool.

Fig 1: DTC B0540 Diagnosis

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