Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
166
Specific fault index within the subsystem.
Frequently asked questions about P0166
What does P0166 mean?
O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3). The control module detected no activity on the O2 Sensor where a changing signal was expected.
Is P0166 generic or manufacturer-specific?
P0166 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0166 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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