Code Definition

P0704 — Clutch Switch Input Circuit Malfunction

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0704

P0704 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0704 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0704 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0704 code indicates a malfunction in the clutch switch input circuit. This fault is detected by the Engine Control Module (ECM) when it finds an irregularity in the signal from the clutch switch. The clutch switch is primarily used in manual transmission vehicles and is engaged when the clutch pedal is pressed. This switch informs the ECM about the clutch pedal's position, which is essential for operations such as starting the vehicle, enabling/disabling cruise control, and managing fuel strategy during gear changes. A malfunction in this circuit can affect the ECM's ability to properly c...

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