GM Service Manual Online
For 1990-2009 cars only

Causes

Action

The engine performance is degraded.

Refer to Powertrain On Board Diagnostic (OBD) System Check .

The Winter Program is selected.

Check the Winter Program selection.

The Default Mode is active.

Refer to On-Board Diagnostic System Check .

The Torque Converter is defective.

Replace the Torque Converter.