P0704: Clutch Switch Input Circuit

Does your vehicle have problems with its transmission? Plug a scan tool into your vehicle to check if it has any hidden trouble codes. If the P0704 code has been triggered, this article will tell you about the code’s definition and common causes and symptoms.

What Does the P0704 Code Mean?

The P0704 code is defined as Clutch Switch Input Circuit. The PCM electronically monitors the clutch pedal position via the clutch switch. When the PCM detects a malfunctioning clutch switch, it will trigger the P0704 code. The clutch switch component is responsible for preventing the engine from starting if the clutchis engaged. The clutch switch does this by interrupting the signal from the ignition switch to the starter motor.

Note: The definition of the P0704 code can be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0704 Code?

The following problems can trigger the P0704 code:

• Faulty clutch switch
• Worn clutch pedal  bushing
• Faulty clutch switch wiring
• Blown fuse
• Faulty PCM or PCM programming error

What are the Common Symptoms of the P0704 Code?

The following symptoms can show up in your vehicle when the P0704 code is triggered:

• The engine refuses to start
• Illuminated check engine light

How to Diagnose the P0704 Code

A faulty clutch switch can be one of the causes of the P0704 code. However, you should never assume that your vehicle has this issue and simply replace the clutch switch without a proper diagnosis. You might need special tools or knowledge in order to access and test the concerned parts in order to properly diagnose the issue.

If you don’t think you’re up to the task, then you shouldn’t hesitate to call a professional mechanic.

Want to diagnose the problem yourself? Watch the video below to get an idea of what the process might involve:

How to Fix the P0704 Code

The code’s definition may signify that the problem is caused by a faulty clutch switch, worn clutch pedal lever, or the other causes listed above. But don’t immediately replace the concerned parts without verifying that they’re causing the problem. Failure to follow the correct inspection procedure might result in unnecessary part replacement. Always keep in mind that there isn’t a magic bullet when it comes to fixing diagnostic trouble codes (DTC).

After you’ve identified the culprit, consult trusted internet repair resources and how-to guides. You can also check your vehicle’s repair manual or internet repair databases because they might have important information regarding your vehicle’s issue.