P0704: Clutch Switch Input Circuit Malfunction
Can you still drive? Yes, the vehicle is drivable. Cruise control may not work and you may need to jiggle the clutch pedal to start the engine until the switch is replaced.
What Does P0704 Mean?
Code P0704 indicates a malfunction in the clutch pedal position switch circuit, found on vehicles with manual transmissions. The PCM uses this signal to manage engine torque during shifts, enable starter engagement, and control cruise control operation. A faulty circuit can prevent starting or disable cruise control.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty clutch pedal position switch
- Misadjusted clutch switch
- Damaged or broken wiring to clutch switch
- Corroded connector at clutch switch
- Worn clutch pedal return mechanism affecting switch contact
Symptoms
- Check engine light on
- Cruise control inoperative
- Vehicle may not start with clutch pressed
- Engine does not reduce torque during shifts
Diagnostic Steps
- 1Test clutch switch operation by checking for starter engagement
- 2Inspect clutch switch adjustment at the clutch pedal
- 3Measure clutch switch continuity with a multimeter
- 4Check wiring from clutch switch to PCM for damage
- 5Verify switch signal changes on a scan tool when pressing the clutch pedal
Recommended Parts & Tools
clutch pedal position switch
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $15 - $150 |
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Chat with AI About P0704Commonly Affected Vehicles
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Frequently Asked Questions
Why won't my manual transmission car start with P0704?
The clutch switch tells the PCM the clutch is pressed, which is required to engage the starter. A faulty switch makes the PCM think the clutch is not pressed, preventing starting.
Is the clutch switch easy to replace?
Yes, the clutch switch is located above the clutch pedal and is a simple, inexpensive repair. Most can be replaced in under 30 minutes with basic tools.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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