Code Definition

B1242 — Air Flow Recirculation Door Driver Circuit Failure

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

About B1242

B1242 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1242 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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.

B1242 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 Flow Recirculation Door Driver Circuit monitors the electronic actuator that positions the recirculation door inside the HVAC case. The HVAC or body control module commands the recirculation door motor to switch between fresh outside air and cabin recirculated air, using position feedback from a potentiometer inside the actuator assembly. DTC B1242 is set when the control module detects that the drive circuit is faulty, typically through an open circuit, a short to ground, a short to battery voltage, or a feedback signal that does not match the commanded position. When this code is act...

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