Code Definition

B1045 — Air Mixing Damper Control Motor Control Circuit Malfunction

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

About B1045

B1045 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 B1045 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

B1045 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

The Air Mixing Damper Control Motor on Mitsubishi vehicles is the actuator that drives the blend door inside the HVAC case to proportion air flow between the heater core and the evaporator. The climate control module drives the motor through a pair of control outputs, effectively an internal H bridge, which allow the module to run the motor in either direction to move the damper open or closed as required. DTC B1045 is set when the module detects an abnormal condition on the motor drive circuit such as an open, short, or excessive resistance, or when the motor fails to respond correctly to the...

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