Code Definition

B1288 — Servo Motor Potentiometer Airintake Right Circuit Failure

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

About B1288

B1288 is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1288 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.

B1288 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 HVAC control module, in some vehicles integrated with the Body Control Module (BCM), monitors the position of the right air intake mode door using a potentiometer mounted in the servo motor assembly. The potentiometer is fed a 5V reference voltage and returns a feedback signal that varies with door position, typically between 0.5V at one end of travel and 4.5V at the other. DTC B1288 sets when the module sees a signal that is out of range, missing, or behaves erratically, which can include an open circuit, intermittent contact, or a signal that does not change when the servo is commanded t...

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