Code Definition

B2631 — Sunload Sensor

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

About B2631

B2631 is a generic (obd-ii standard) body diagnostic trouble code recorded for Infiniti vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B2631 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 B2631 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 Automatic Climate Control Module (A/C Amplifier) monitors the sunload sensor signal to determine solar radiation intensity for automatic cabin temperature regulation. DTC B2631 is set when the control module detects a sunload sensor signal that is outside the specified voltage range, implausible relative to ambient temperature and vehicle operating conditions, or missing for a calibrated period. This indicates that the climate control system cannot accurately compensate for solar heat load. When this code is set automatic climate control may over cool or under cool the cabin as sunlight ch...

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