U0126 — Lost Communication With Steering Angle Sensor Module

Q: "What causes communication codes?"

"Usually a wiring issue, corroded connector, failed module, or dead battery. The CAN bus network connects all your car's computers."

Q: "Can a bad battery cause network codes?"

"Yes. Low voltage can cause communication failures between modules. Always check battery health first — it's the cheapest potential fix."

What Does U0126 Mean?

U0126 is a diagnostic trouble code indicating: Lost Communication With Steering Angle Sensor Module. This code relates to the network communication system. It has been reported in NHTSA complaints across 2 different vehicle models.

Symptoms of U0126

⚠️ Vehicle enters limp/reduced power mode

Common Causes

🔍 Sensor or control module malfunction

U0126 Reports by Year

2016

1

2026

1

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

"Anti-Lock Brake System stopped working rendering the car inoperable. The first incident: about 5 years ago the ABS engaged the brakes while driving almost causing a collision. This incident occurred in Guaynabo, PR. After this incident the ABS Module stopped working but the car was still operable. A"
— Jeep Wrangler owner, 02/22/2026

Source: NHTSA Complaints Database

Most Reported Vehicles for U0126

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	TOYOTA SIENNA
2	JEEP WRANGLER

Frequently Asked Questions

What causes communication codes?

Usually a wiring issue, corroded connector, failed module, or dead battery. The CAN bus network connects all your car's computers.

Can a bad battery cause network codes?

Yes. Low voltage can cause communication failures between modules. Always check battery health first — it's the cheapest potential fix.

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)

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

U0126: Lost Communication With Steering Angle Sensor Module