Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
P0841 - Condition 1
Line Pressure= Greater than 675 kPa (98 PSI) from what the transmission control module commanded for at least 5 s.
P0841 - Condition 2
Line Pressure=Less than 1200 kPa (174 PSI) from what the transmission control module commanded for at least 30 s.
P0842
Transmission Fluid Pressure=Greater than 4.7 V - For greater than 4 s
P0843
Transmission Fluid Pressure=Less than 0.09 V - For greater than 4 s