Code Definition

B1658 — Seat Driver Rear Up Circuit Short To Ground

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

About B1658

B1658 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 B1658 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) 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.

B1658 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

B1658 indicates that the seat control module has detected a short to ground condition on the driver seat rear up motor circuit. This circuit drives the rear lift motor that raises the rear of the driver seat cushion, and the module sets this code when it observes the rear up output being pulled toward ground when it should not be, or when the current draw on the up command exceeds a safe threshold and is sinking through an unintended ground path. The fault is most often caused by a chafed conductor making contact with the seat frame or vehicle body, water ingress into a connector tying a pin t...

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