The control module detected that the signal in the Left Rear Wheel Speed Sensor B circuit stayed below the expected operating range.
TuningBot DTC Database · v4.37.15
C0661 Left Rear Wheel Speed Sensor B Circuit Low
Generic (OBD-II) interpretation in the TuningBot DTC database.
What C0661 means
Related and nearby codes
How to read C0661
Chassis: brakes, steering and suspension.
Generic SAE-standard code: same meaning on every make.
Specific fault index within the subsystem.
Frequently asked questions about C0661
What does C0661 mean?
Left Rear Wheel Speed Sensor B Circuit Low. The control module detected that the signal in the Left Rear Wheel Speed Sensor B circuit stayed below the expected operating range.
Is C0661 generic or manufacturer-specific?
C0661 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove C0661 at file level?
Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether C0661 is removable in your case.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic
