Lost Communication With Serial Data Gateway Module E
What it means
U0150 means the network has lost communication with a serial data gateway module, the unit that passes messages between the vehicle's separate communication buses. Because a gateway sits in the middle, losing it can take several modules offline at once, so you often see a cluster of communication codes and multiple warning lights. How serious it is depends on which systems sit behind that gateway.
Can I keep driving? Often drivable, but a gateway routes traffic between buses — losing it can knock out several modules at once, so verify what's affected before relying on the car.
Common symptoms
What you'll notice
- Multiple warning lights and several modules unreachable when scanned
- Features across different systems failing at the same time
- A large cluster of 'lost communication' U-codes stored together
- Diagnostic tools unable to reach modules that sit behind the gateway
Common causes
Most likely first
- Open, shorted, or chafed wiring at the gateway moduleLikely
- Corroded or loose connector at the gatewayCommon
- Blown fuse or lost power/ground to the gatewayCommon
- Failed serial data gateway moduleLess often
- A bus fault on one side of the gatewayLess often
How to diagnose & fix
Work through it in order
- Scan all modules and map which ones went offline — modules behind the gateway point to it.
- Check the gateway's power, ground, and fuse feeds.
- Inspect the wiring and connectors at the gateway for damage, corrosion, or moisture.
- Test the bus lines on each side of the gateway for open or short.
- If wiring and power are good, replace the gateway module, clear the codes, and confirm all modules report.
FAQ
Quick answers
Is it safe to drive with U0150?+
Can I just clear U0150?+
Related codes
Often seen with U0150
Read & clear U0150 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.