Diagnostic Aids: P0873
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- If DTC P0701 is set in combination with DTC P0873, diagnose P0701 prior to proceeding to DTC P0873.
- You may have to drive the vehicle in order to experience a condition.
- This DTC may indicate that SS3 is mechanically defective.
- When DTCs P0761 and P0873 are set in combination, this may indicate an open circuit condition on the pressure switch 3 circuit or the shift valve 3 is stuck in the destroked position.
- This DTC can be caused by a loss of prime.
- This DTC can be caused by a plugged control main filter.