Code Definition

B0164 — Cabin temperature sensor signal out of range - sensor 1

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About B0164

B0164 is a generic (obd-ii standard) body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B0164 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

Because B0164 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC B0164 sets when the HVAC control module detects that the signal from cabin (in-car) temperature sensor 1 is outside its expected operating range. The cabin temperature sensor is a small negative temperature coefficient thermistor mounted in the dashboard, instrument cluster surround or roof console, typically housed inside an aspirator assembly that uses either a small electric fan or ducting from the HVAC blower to draw cabin air across the thermistor for an accurate, well-mixed reading. The HVAC control module supplies a 5-volt reference through a pull-up resistor and reads the voltage d...

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