Code Definition

B1466 — Wiper Hi/Low Speed Not Switching

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

About B1466

B1466 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 B1466 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.

B1466 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 Body Control Module (BCM) commands the windshield wiper motor between high and low speed by switching between two separate motor windings or by varying the speed control input depending on the platform. DTC B1466 is set when the BCM commands a speed change but the feedback or motor response indicates that the speed switch did not occur as expected. The wiper motor on most vehicles uses two separate brushes that allow current through different sections of the armature winding to produce two distinct rotational speeds, with the BCM selecting between them via dedicated relays or solid state d...

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