Code Definition

B2606 — A/C Temperature Sensor Out of Range

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

About B2606

B2606 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 B2606 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 B2606 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 climate control or HVAC module uses temperature sensors to regulate cabin comfort and air conditioning operation. These sensors are typically thermistors whose resistance changes with temperature, and the module supplies a reference voltage and reads the resulting signal voltage to calculate temperature. DTC B2606 is set when the A/C temperature sensor signal falls outside its valid range, either too high or too low, producing a reading the module cannot use. Depending on which sensor is involved, such as the evaporator, in car, or discharge air temperature sensor, an out of range reading ...

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