Code Definition

B1002 — Cabin temperature sensor signal Circuit open

System: Body  |  Type: Manufacturer-Specific  |  Make: Mitsubishi

About B1002

B1002 is a manufacturer-specific body diagnostic trouble code recorded for Mitsubishi vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1002 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; 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.

B1002 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

This code is specific to Mitsubishi vehicles and is set when the climate control module detects an open circuit condition in the cabin (in-car) temperature sensor signal circuit. The cabin temperature sensor is a thermistor typically mounted behind or near the dashboard that measures the interior air temperature, allowing the automatic climate control system to regulate heating, cooling, and blower speed to maintain the set temperature. When this sensor circuit is open, the climate control module loses its primary feedback for cabin temperature, which typically causes the system to default to ...

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