DTC Descriptor

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.

DTC P3400: Cylinder Deactivation System
DTC P3401: Cylinder 1 Deactivation Solenoid Valve Control Circuit
DTC P3403: Cylinder 1 Deactivation Solenoid Valve Control Circuit Low Voltage
DTC P3404: Cylinder 1 Deactivation Solenoid Valve Control Circuit High Voltage
DTC P3425: Cylinder 4 Deactivation Solenoid Valve Control Circuit
DTC P3427: Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage
DTC P3428: Cylinder 4 Deactivation Solenoid Valve Control Circuit High Voltage
DTC P3441: Cylinder 6 Deactivation Solenoid Valve Control Circuit
DTC P3443: Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage
DTC P3444: Cylinder 6 Deactivation Solenoid Valve Control Circuit High Voltage
DTC P3449: Cylinder 7 Deactivation Solenoid Valve Control Circuit
DTC P3451: Cylinder 7 Deactivation Solenoid Valve Control Circuit Low Voltage
DTC P3452: Cylinder 7 Deactivation Solenoid Valve Control Circuit High Voltage