U0150: Lost Communication With Gateway E

U0150 is the last code of the gateway block and points at Gateway E. Gateways are central nodes that connect bus systems of different speed and type and forward only the messages each side needs. When E stops sending, the modules that expect its traffic log U0150, the way GM's U0100-U02FF procedure describes for any silent sender: a supervised periodic message is missing although supply voltage is in range. No manufacturer documents U0150 publicly; GM's U-code list ends its gateway entries at U0146. U0146 to U0149 refer to gateways A to D. Before suspecting the gateway, check power, ground and the bus lines to it; a code stored only in history after battery work needs no repair. MIL normally stays off.

Medium severity. Can I keep driving?It depends on which control module has dropped out. If it affects the engine, brakes, or steering, do not continue your trip: call for roadside assistance.

Symptoms

Modules routed through gateway E not reachable by the scan tool
Several functions fail together
Warning messages in the instrument cluster

Most likely causes

Gateway E fuse blown or ground loose
Bus line to gateway E chafed or connector corroded
Gateway E software fault, update or reprogramming needed
Gateway E internally faulty

What to check, in order

Start with the simplest. You can tick off each step.

Check the battery and terminals, and read the codes from all control modules with a multi-system scanner
Identify which control module is not responding and check its fuses, power supply, and grounds
Disconnect add-on accessories, such as alarms or trackers, and read the codes again
Inspect the network connectors for moisture or bent pins
Measure the network's resistance and signal using the manufacturer's wiring diagram

Good to know

Repair difficulty: hard
It can trigger limp mode.

What each character of U0150 means

U: Communication network
0: Generic code: same on every make
1: Subsystem depends on the code range
50: Specific fault in that system

Frequently asked questions

Can I keep driving with code U0150?

It depends on which control module has dropped out. If it affects the engine, brakes, or steering, do not continue your trip: call for roadside assistance.

What causes code U0150?

The most common causes are: gateway E fuse blown or ground loose; bus line to gateway E chafed or connector corroded; gateway E software fault, update or reprogramming needed.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.