U0123: Lost Communication With Yaw Rate Sensor Module
What Does U0123 Mean?
U0123 is a diagnostic trouble code indicating: Lost Communication With Yaw Rate Sensor Module. This code relates to the network communication system. It has been reported in NHTSA complaints across 1 different vehicle models.
Common Causes
- 🔍 Sensor or control module malfunction
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"OUR 2010 TOYOTA SIENNA RECENTLY HAD A CEL GO ON. NO CODES WERE FOUND BY LOCAL REPAIR SHOP SO TOOK THE CAR TO TOYOTA DEALER. DEALER GAVE US ERROR CODE U0123, U0124, U0126 AND SAID WE WOULD HAVE TO REPLACE THE ABS ACTUATOR PUMP WHICH WILL COST $3600+. I SEARCHED ONLINE AND MANY HAVE/HAD THE SAME PRO"
— Toyota Sienna owner, 11/01/2016
Source: NHTSA Complaints Database
Most Reported Vehicles for U0123
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | TOYOTA SIENNA |
Frequently Asked Questions
What causes communication codes?
Can a bad battery cause network codes?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Check battery voltage and ground connections; inspect CAN bus wiring
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.