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P26C4 Powertrain

Internal Control Module Clutch Pedal Performance

The internal clutch pedal interpretation logic in the control module does not match the external clutch switch state. Manual transmission start interlock or stop-start enable can misbehave.

Affected components

  • Control module
  • Clutch switch

Common causes

  • Medium likelihood: External clutch switch drift
  • Medium likelihood: Signal corruption between switch and ECU

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

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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