P0831 Clutch Pedal Switch A Circuit Low

P0831 indicates clutch pedal switch A circuit low. The switch A signal is lower than expected or stuck in a low-voltage state.

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 the starter or clutch parts before checking the low switch signal electrically.

Useful checks before replacing parts

Measure switch A signal voltage, feed, ground, and continuity while the clutch pedal moves through its full travel.
Inspect switch adjustment, connector terminals, pedal harness flex points, blown fuses, and short-to-ground conditions.
Compare clutch switch A and B data if both are present to determine whether the low signal is isolated or shared.

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.