P0826 Up and Down Shift Switch Circuit

P0826 points to the up and down shift switch circuit. The manual shift request input is not behaving as the transmission controller expects.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System
Transmission
Scope
iso-sae-controlled-p0
Standard
SAE J2012 / ISO 15031-6
Source
legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace transmission solenoids for a manual shift switch circuit code; the fault is in the request input path.

Useful checks before replacing parts

Related OBD-II codes

These nearby transmission entries can help compare wording and fault area. They may share the same verification status as the source database.