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P0831 Powertrain

Clutch Pedal Switch A Circuit Low

Clutch pedal switch A input reads stuck low — short to ground or stuck-closed contact. The ECM may treat clutch as constantly disengaged, blocking cruise control or affecting cranking permission on manual transmissions.

Affected components

  • Clutch pedal switch a

Common causes

  • High likelihood: Switch wire shorted to ground
  • Low likelihood: Connector pins corroded - high contact resistance
  • Low likelihood: Harness chafing through insulation

Possible symptoms

  • Check engine or transmission warning light on
  • Harsh, delayed, or missing shifts
  • Possible limp mode (locked in one gear)
  • Slipping or shuddering during gear changes

Diagnostic notes

  • The malfunction indicator lamp may illuminate

Related codes

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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