Code Definition

B14A1 — Sunload Sensor Circuit Low/Open

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

About B14A1

B14A1 is a manufacturer-specific body diagnostic trouble code recorded for Subaru vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B14A1 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit; a signal or supply voltage lower than the expected operating range; 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.

B14A1 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

B14A1 is a Subaru body code stored by the automatic climate control module when the sunload sensor circuit reads low or open. The sunload sensor is a photodiode mounted in the top of the dash pad, normally at the centre or near the defrost vent, and it looks up through the windscreen to measure how much solar energy is entering the cabin. The climate control module uses that value to bias blower speed, discharge air temperature and air distribution so the cabin holds its set temperature on a sunny day. Signal voltage falls as light intensity rises, so an open circuit or a sensor that has faile...

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