U0155: How to Diagnose & Fix — Lost Communication with Instrument Cluster
21 vehicles · 15 makes · $100-$2,200 repair
How to diagnose and fix U0155: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Jaguar S-TYPE · 2000–2008
The S-TYPE is notorious for electrical gremlins caused by moisture ingress into control modules and poor CAN bus connections. Phantom warning lights, inoperative features, and intermittent faults across multiple systems are common and difficult to diagnose without dealer-level equipment.
Common Symptoms
- Multiple warning lights illuminated simultaneously
- Windows or locks operating erratically
- Instrument cluster errors or flickering
- Intermittent no-start condition
- Features working one day and not the next
How to Fix
Check all module locations for moisture ingress, particularly the driver footwell and trunk. Clean and reseal all CAN bus connectors with dielectric grease. Reprogram affected modules with the latest software. Replace the 12V battery if it is over 4 years old.
Owner tips & cautions
- TipBuy an iCarsoft i930 Jaguar-specific scanner. It reads all Jaguar modules and saves thousands in dealer diagnostic fees. Essential tool for S-TYPE ownership.
Sources for this issue (2)
Jaguar I-PACE · 2019–2025
The I-PACE suffers from excessive 12V auxiliary battery drain when the vehicle is parked. Multiple electronic modules fail to enter sleep mode properly, drawing power continuously from the 12V system. A dead 12V battery prevents the high-voltage system from activating, leaving the car completely immobilized.
Common Symptoms
- Dead 12V battery after 3-5 days of sitting
- Vehicle will not power on or unlock
- Infotainment system not booting
- Error messages on first startup after sitting
- Key fob not detected
How to Fix
Update the vehicle software to the latest OTA version, which improves module sleep behavior. Replace the 12V battery with a genuine Jaguar AGM battery. If the issue persists, a dealer needs to identify and reprogram the module that is not sleeping. Connect a battery tender if the car sits for more than 5 days.
Sources for this issue (3)
Jeep Gladiator · 2020–2024
The 3.5-inch instrument panel cluster display can fail due to a bad circuit board (made by Marelli) that shorts out internally. Drivers lose speedometer, fuel gauge, engine temperature, turn signal indicators, and other warning lights. FCA recalled 32,863 2018-2024 Wrangler and 2020-2024 Gladiator vehicles for this internal short (NHTSA 24V-652, FCA 30B), and in October 2025 NHTSA opened a preliminary evaluation covering about 232,000 2020 model-year Gladiator and Wrangler vehicles.
Common Symptoms
- Speedometer stops working or reads incorrectly
- Fuel gauge inoperable
- Engine temperature gauge fails
- Turn signal indicators not illuminating
- Warning lights all illuminate simultaneously
- Intermittent blank instrument cluster display
How to Fix
Dealer replacement of the instrument panel cluster module is the primary fix ($500-1,200 at dealer). Some independent repair shops (such as Cluster Fix) can repair the circuit board for $200-400. Ensure any replacement is properly programmed to match the vehicle VIN and current mileage.
Owner tips & cautions
- TipCheck if your VIN falls under the NHTSA investigation - a formal recall may result in free repairs
- TipCircuit board repair shops like Cluster Fix can refurbish the IPC for $200-400 instead of full replacement
- WarningDriving without a functional speedometer and warning lights is unsafe and may fail state inspection
Sources for this issue (3)
Kia Seltos · 2021–2024
Mercedes-Benz EQS SUV · 2023–2023
Find U0155 by make
Browse every documented model and issue for your make.
U0155 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does U0155 mean?
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.
What are the most common causes of U0155?
The most common causes of U0155 are: 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. The specific cause varies by vehicle.
How much does it cost to fix U0155?
Repair costs for U0155 range from $100 to $2,200, depending on the vehicle and root cause.
Which vehicles are affected by U0155?
Au7o has documented U0155 across 21 vehicle models from 15 manufacturers: Buick, Chrysler, Ford, GMC, Hyundai, Jaguar, Jeep, Kia, Land Rover, Lexus, Lincoln, Mercedes-Benz, RAM, Toyota, Volvo.
Join 700+ subscribers following Au7o for vehicle insights and updates.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.