Clutch Pedal Switch B Circuit High
Diagnostic trouble code P0835 indicates that the powertrain control module (PCM) has detected a voltage signal from the clutch pedal position switch 'B' circuit that is higher than the manufacturer's expected parameters. This typically occurs when the switch fails internally, is misadjusted, or there is a short to voltage in the wiring circuit.
While not inherently dangerous, this code can prevent the vehicle from starting due to the starter interlock system. It should be diagnosed soon to restore full functionality to the cruise control and starting systems.
Common symptoms
- Check engine light illuminated
- Engine will not crank or start
- Cruise control is inoperative
- Engine RPM flares when the clutch is depressed
- Harsh shifting in automated manual transmissions
Likely causes
- Faulty clutch pedal position switch
- Misadjusted clutch pedal switch
- Short to voltage in the clutch switch wiring harness
- Open ground circuit in the clutch switch wiring
- Corroded or damaged electrical connector
- Faulty Powertrain Control Module (PCM) (rare)
What to check before replacing parts
Visually inspect the clutch pedal switch, wiring harness, and connector under the dashboard.
Look for: Look for disconnected wires, chafed insulation causing a short to power, or physical damage to the switch housing.
Verify the physical adjustment and mounting of the clutch pedal switch.
Look for: Ensure the switch is securely mounted and that the clutch pedal arm properly engages and fully depresses the switch plunger when released.
Test the clutch pedal switch for proper continuity using a digital multimeter.
Look for: The switch should show continuity (low resistance) when closed and no continuity (infinite resistance) when open; failure to change states indicates a faulty switch.
Measure the voltage at the clutch switch connector with the ignition on.
Look for: Check if the reference voltage is present and if there is unexpected battery voltage on the signal wire when the switch is open, indicating a short to power.
Test the ground circuit for the clutch pedal switch.
Look for: A high resistance reading or lack of continuity to chassis ground indicates an open ground, which can cause the circuit voltage to remain high.
This page explains the generic P0835 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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