Code Definition

B2469 — Aux Heater Coolant Pump Circuit Open

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

About B2469

B2469 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 B2469 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

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 B2469 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 auxiliary heater control module drives the auxiliary coolant pump through a switched circuit and monitors current draw or feedback to confirm the circuit is complete. DTC B2469 sets when the module commands the pump on but detects an open circuit condition, meaning no current is flowing or the expected feedback signal is missing. The fault can originate in the supply side wiring, the pump motor itself, the ground return, or an inline connector along the harness run. When this code is set, the auxiliary coolant pump will not operate, which prevents coolant circulation through the auxiliary ...

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