Code Definition

P0826 — Up and Down Switch Input Circuit error

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0826

P0826 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0826 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0826 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This fault code is triggered when the control module detects a malfunction within the circuitry of the up and down switch, which is used for manual gear selection in vehicles with automatic transmission. This issue is typically identified when the control module receives an incorrect or no signal from the up and down switch, suggesting a fault in the switch itself, the wiring, or the circuit. The error indicates a problem with the electrical pathway from the switch to the control module, which could be due to a short circuit, open circuit, or poor electrical connection.

Quick Facts