Code Definition

B0169 — Cabin temperature sensor signal missing - sensor 1

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

About B0169

B0169 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 B0169 is stored, the module has detected 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 B0169 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

The Cabin Temperature Sensor (in-car temperature sensor) is a thermistor that reports the temperature inside the passenger compartment to the HVAC control module. The HVAC module uses this input together with ambient and sunload data to regulate blower speed, air mix, and mode door positions for automatic climate control. DTC B0169 is set when the HVAC control module detects a missing or invalid signal from cabin temperature sensor 1, typically caused by an open circuit, a complete short, or a sensor reading that is outside the expected resistance range. When this code is active the climate co...

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