OBD2 Car ScannerWhat does C1146 mean?
C1146 stands for Speed Wheel Sensor RF Circuit Open. A chassis module has found a fault in a system like ABS, traction or stability control, steering or suspension.
Chassis codes cover the ABS, traction control, steering and suspension. When the car's computer sees a reading outside its normal range, it stores this code and may turn on a warning light on the dashboard.
Common causes
- Faulty or dirty wheel speed sensor
- Damaged sensor wiring
- Low brake fluid
- Faulty ABS pump or module
What to do
- Read all stored and pending codes with a scanner. Several codes together often point to one cause.
- Note the freeze frame data (speed, temperature, load) recorded when the code was set.
- Inspect the wiring and connectors of the part named in the code for damage, corrosion or looseness.
- Fix the most likely and cheapest cause first, then clear the code and drive to see if it comes back.
Read this code from your own car
Plug in a cheap ELM327 adapter and the app shows every fault code, what it means and how to fix it.
Frequently asked questions
What does C1146 mean?
C1146 means “Speed Wheel Sensor RF Circuit Open”. It belongs to the chassis system group: A chassis module has found a fault in a system like ABS, traction or stability control, steering or suspension.
Is it safe to drive with C1146?
Avoid driving long distances. This kind of fault can cause damage or affect safety, so get it checked as soon as possible.
How do I clear C1146?
Fix the cause, then clear the code with an OBD2 scanner or app. If the fault is still there, the code will come back.
Related codes
- C1142Wheel Speed Sensor RF Tone Ring Tooth Missing Fault
- C1143Wheel Speed Sensor LR Tone Ring Tooth Missing Fault
- C1144Wheel Speed Sensor RR Tone Ring Tooth Missing Fault
- C1145Speed Wheel Sensor RF Input Circuit Failure
- C1148Speed Wheel Sensor RF Coherency Fault
- C1149Hydraulic Fluid Pressure/ Flow Circuit Failure
- C1150Two Speed Rear Axle Input Switch Circuit Short to Vbatt
- C1155Speed Wheel Sensor LF Input Circuit Failure
Code meanings can vary by manufacturer. This page is general guidance, not a repair manual. Always confirm the cause before replacing parts.