Code Definition

B2426 — Passenger Solar Radiation Sensor Circuit Open

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

About B2426

B2426 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 B2426 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.

Because B2426 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 Module uses input from the passenger side solar radiation sensor, typically a photodiode mounted on the top of the dashboard near the windscreen base, to bias HVAC blower speed, mix door position, and fan distribution to compensate for direct sunlight heating the passenger occupant. DTC B2426 is set when the module detects an open circuit on the passenger solar sensor input, with the signal voltage pulled to its reference rail and no current returning through the sensor. This usually means the sensor itself has gone open, the signal or ground wire is broken, or the connecto...

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