Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Lean Test Enable:

DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0200, P0300, P0442, P0446, P0452, P0453, P0455, P0496 are not set.
The Loop Status parameter is closed.
The Ignition 1 Signal parameter is between 10-18 volts.
The Fuel Tank Level Remaining parameter is more than 10 percent.
The TP Sensor parameter is between 3-70 percent.

OR

Power Enrichment Test Enable:

DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0121, P0122, P0123, P0200, P0300, P0442, P0446, P0452, P0453, P0455, P0496 are not set.
The Loop Status parameter is closed.
The Ignition 1 Signal parameter is between 10-18 volts.
The Fuel Tank Level Remaining parameter is more than 10 percent.
The Engine Run Time parameter is more than 30 seconds.
The Power Enrichment parameter is active for more than 1 second.