Error code

OBD2 P0805

OBD2P0805
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Clutch Position Sensor Circuit.

Severity

moderateIf the engine can be started with this code present, drive carefully as it's easy to forget that the manual transmission might be in gear.

Summary

The P0805 code indicates a malfunction in the clutch position sensor circuit, which is located near or on the clutch pedal. This sensor ensures that the engine cannot start unless the clutch is disengaged.

Symptoms

  • Stored trouble code and possibly an illuminated warning light
  • Engine may not crank when the clutch pedal is fully depressed
  • Engine cranks and starts without needing to depress the clutch pedal in some cases
  • No symptoms at all in rare instances

Common Causes

  • Defective clutch position sensor/switch
  • Damaged, shorted, burnt, disconnected, or corroded wiring and/or connectors
  • Incorrect adjustment or alignment of the switch

Diagnosis

  1. Record all fault codes and freeze frame data
  2. Inspect the clutch position sensor for visible damage or misalignment
  3. Check electrical connector for looseness, damage, corrosion, or other defects
  4. Verify full battery voltage at the power supply wire of the sensor
  5. Test switch manually with a multimeter to ensure proper current flow

Fixes

  • Replace defective clutch position sensor/switch— $25-$70 (DIY basis)

FAQ

How do I troubleshoot P0805?

Follow these steps: record fault codes, inspect the switch and wiring for damage or misalignment, verify battery voltage at the sensor connector, test the switch manually with a multimeter.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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