Conditions for Setting the DTC
WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
P176B Condition 1
Transmission Intermediate Speed Sensor = Greater than 60 RPM - Gear 1, 2
Condition 2
Transmission Intermediate Speed Sensor - Slip Detected = Greater than 60 RPM - Gear 3, 4, 5, 6, 7, 8
P176C
Transmission Intermediate Speed Sensor = Less than 0.25 V - For greater than 1 s
P176D
Transmission Intermediate Speed Sensor = Greater than 4.75 V - For greater than 1 s