Conditions for Setting the DTC
WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
P182A
TCM has detected the internal mode switch A signal circuit voltage is less than 0.7 V, for 1.75 s.
P1838
TCM has detected the internal mode switch A signal circuit voltage is greater than 2.38 V, for 1.75 s.
P18B5
TCM has detected the internal mode switch A signal circuit voltage is between 0.966-1.68 V, for 1.75 s.
P18BA
TCM has detected the internal mode switch A signal circuit has an invalid voltage range of 1.68 - 2.38 V, for 2.7 s.
P18BF
TCM has detected the internal mode switch A signal circuit has an invalid voltage range of 0.70 - 0.96 V, for 2.7 s.