U0150 code meaning
Lost Communication With Gateway E
What U0150 means
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.
U0150 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0150
- Modules routed through gateway E not reachable by the scan tool
- Several functions fail together
- Warning messages in the instrument cluster
Common causes of U0150
- Most likelyGateway E fuse blown or ground loose
- PossibleBus line to gateway E chafed or connector corroded
- Less likelyGateway E software fault, update or reprogramming needed
- Less likelyGateway E internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Gateway moduleCAN bus wiring
What each part of U0150 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 50 | The exact fault in that area. |
What to do next
- Note U0150 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0150
What does U0150 mean?
U0150 means "Lost Communication With Gateway E". U0150 is the last code of the gateway block and points at Gateway E. It is a generic code, so it means the same on every make.
Is it safe to drive with U0150?
Drive gently and only to a workshop. With U0150 the car can go into limp mode (reduced power) to protect itself.
Will U0150 fail an emissions test?
U0150 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0150 to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will U0150 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.