U0155 on Cadillac
Lost Communication with Instrument Cluster
U0155 on Cadillac vehicles indicates lost communication with instrument cluster. Au7o has documented this code across 1 Cadillac model — most commonly on Escalade ESV. This is a network communication code meaning a control module (usually the engine or body computer) has lost communication with the instrument cluster over the vehicle's data bus. Modern vehicles share information between modules over a network (such as CAN), and the cluster both displays data and relays messages. When messages from the cluster stop arriving, this code sets. You may see warning lights, dead or erratic gauges, missing displays, or other modules acting up. It usually points to wiring, power/ground, or the cluster itself rather than the engine. Typical repair costs on Cadillac range from $150 to $3,500, depending on the specific model and root cause.
Common Causes of U0155
- •Faulty instrument cluster
- •Loss of power or ground to the cluster
- •Damaged or corroded CAN bus wiring
- •Loose or corroded connectors at the cluster
- •Blown fuse feeding the cluster
- •Short or open on the communication bus
- •A different failed module dragging down the bus
U0155 on Cadillac by Model
Cadillac Escalade ESV(1 issue)
- OLED Curved Display Blackout, Flicker, and Infotainment Module Failures2021-2025
The 38-inch curved OLED display system in the 2021+ Escalade ESV has generated repeated owner complaints for black screens, flickering, frozen infotainment, loss of backup camera image, and intermittent gauge display issues. Reports point to software instability, communication faults between display/control modules, and occasional hardware replacement of the radio or display assembly. Because key vehicle functions are integrated into the screen, failures can affect usability and safety features.
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What does U0155 mean on Cadillac?▼
U0155 stands for "Lost Communication with Instrument Cluster." This is a network communication code meaning a control module (usually the engine or body computer) has lost communication with the instrument cluster over the vehicle's data bus. Modern vehicles share information between modules over a network (such as CAN), and the cluster both displays data and relays messages. When messages from the cluster stop arriving, this code sets. You may see warning lights, dead or erratic gauges, missing displays, or other modules acting up. It usually points to wiring, power/ground, or the cluster itself rather than the engine. On Cadillac specifically, this code is documented across 1 model.
What causes U0155 on Cadillac vehicles?▼
Common causes on Cadillac: Faulty instrument cluster, Loss of power or ground to the cluster, Damaged or corroded CAN bus wiring, Loose or corroded connectors at the cluster, Blown fuse feeding the cluster. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix U0155 on a Cadillac?▼
Repair costs on Cadillac range from $150 to $3,500, depending on the specific model and root cause.
Which Cadillac models have U0155 documented?▼
Au7o has documented U0155 on 1 Cadillac model: Escalade ESV.