U0126 — Lost communication with steering angle sensor
The vehicle's computer is not receiving data from the steering angle sensor module. This sensor helps the car understand the steering wheel position, which is important for stability control and other safety features.
Common causes
The cause is almost always one of a few things. Here they are — U0126 rarely comes from anything outside this list:
- Faulty steering angle sensor module
- Damaged or loose wiring/connectors
- Faulty or corroded CAN bus network connection
- Software or module communication error
- Blown fuse related to sensor power
Where to start
In the order a sensible mechanic would work — the cheap checks first, the expensive replacements only after:
- Check and secure wiring and connectors at the sensor
- Inspect and repair CAN bus wiring and connectors
- Test and replace blown fuses if found
- Reset or update vehicle software modules
- Replace the steering angle sensor module if faulty
That is what holds for U0126 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.
Why TorqFix for your car?
Above is what the code means and why it appears. TorqFix goes further — it gives you specific procedures, torque values, wiring diagrams and pinouts for your exact engine, not generic steps for every car. Real workshop data (127,000+ diagrams, 10,000+ procedures), interpreted by AI in your language.
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Code breakdown
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
The same code can mean different things on different makes. Match the meaning to your make before acting on it.
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