U0155 on Hyundai
Lost Communication with Instrument Cluster
U0155 on Hyundai vehicles indicates lost communication with instrument cluster. Au7o has documented this code across 1 Hyundai model — most commonly on Tucson. 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.
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 Hyundai by Model
Hyundai Tucson(1 issue)
- Instrument Cluster and Head-Up Display Blackout with 'No Signal' (Recalls 26V047000 and 26V400000)2025-2026
The dominant electrical failure on the current Tucson is a software fault that blanks the digital instrument cluster, and on equipped cars the head-up display and center touchscreen along with it. Hyundai has recalled the vehicle for it twice: NHTSA campaign 26V047000 (March 2026) covered 2025-2026 Tucson, Tucson Hybrid and Tucson PHEV among a broad list of Hyundai models, and campaign 26V400000 (August 2026) recalled roughly 96,000 additional 2025-2026 Tucson, Tucson Hybrid and Tucson PHEV vehicles for the same defect — meaning the first software remedy did not fully resolve it. Both campaigns cite noncompliance with FMVSS 101, 'Controls and Displays,' because the driver loses the speedometer and warning telltales. Fifty-one NHTSA complaints on the 2025 Tucson carry an ELECTRICAL SYSTEM component. Owners describe the cluster showing a black screen with 'NO SIGNAL' for minutes at a time (ODI 11749421), dropping out for three seconds every one to two minutes and taking the side cameras with it (ODI 11729572), a daily and progressively worsening total blackout of cluster and infotainment (ODI 11731497), and one car diagnosed with a rear-view camera display failure behind the blank cluster (ODI 11715488). Several reports pair the blackout with the vehicle stalling or failing to start.
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What does U0155 mean on Hyundai?▼
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 Hyundai specifically, this code is documented across 1 model.
What causes U0155 on Hyundai vehicles?▼
Common causes on Hyundai: 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 Hyundai?▼
Repair costs vary widely depending on the root cause and specific Hyundai model.
Which Hyundai models have U0155 documented?▼
Au7o has documented U0155 on 1 Hyundai model: Tucson.