Clutch Pedal Switch "B" Circuit High
P0835 indicates the clutch pedal position switch B circuit is reading higher voltage than expected. This sensor monitors whether the clutch pedal is engaged or disengaged, and a high signal typically means the switch is stuck open or the circuit has a signal integrity problem.
What You Might Notice
- Engine will not start or has difficulty starting
- Engine starts without requiring clutch pedal engagement
- Check Engine Light illuminated
- Transmission shifts unexpectedly or engages without clutch pedal
- Clutch pedal feels unresponsive or physically stuck
Most Common Causes
- 1
Faulty clutch position sensor switch
The clutch pedal switch B may be internally damaged, worn, or stuck in the open position, preventing it from sending the correct voltage signal to the PCM.
- 2
Corroded or damaged connector
Corrosion, loose terminals, or physical damage at the clutch switch connector can cause high circuit resistance and prevent proper signal transmission.
- 3
Faulty or damaged wiring
Broken, pinched, or corroded wires in the clutch switch circuit can create an open circuit condition that reads as a high voltage signal.
- 4
Blown fuse or fuseable link
A blown fuse protecting the clutch switch circuit will cause complete loss of signal, resulting in a high voltage reading at the PCM.
How to Diagnose It
- 1
Check Faulty clutch position sensor switch — The clutch pedal switch B may be internally damaged, worn, or stuck in the open position, preventing it from sending the correct voltage signal to the PCM.
- 2
Check Corroded or damaged connector — Corrosion, loose terminals, or physical damage at the clutch switch connector can cause high circuit resistance and prevent proper signal transmission.
- 3
Check Faulty or damaged wiring — Broken, pinched, or corroded wires in the clutch switch circuit can create an open circuit condition that reads as a high voltage signal.
- 4
Check Blown fuse or fuseable link — A blown fuse protecting the clutch switch circuit will cause complete loss of signal, resulting in a high voltage reading at the PCM.
How to Fix It
- 1
Inspect and clean clutch switch connector
Locate the clutch pedal switch connector under the dashboard near the pedal assembly. Disconnect it, clean any corrosion from the terminals with contact cleaner, and reconnect firmly. Test for proper operation.
- 2
Replace clutch pedal position switch
If the connector is clean but the code persists, the switch itself is likely faulty and must be replaced. Remove the old switch from the pedal bracket and install a new one, ensuring proper adjustment so it activates when the pedal is released.
- 3
Repair or replace damaged wiring
Inspect the wiring harness from the clutch switch to the PCM for cuts, corrosion, or pinching. Repair any damaged sections with proper automotive wire and connectors, or replace the entire harness if damage is extensive.
- 4
Check and replace fuse
Locate the fuse protecting the clutch switch circuit in the fuse box (consult the vehicle's fuse diagram). Replace any blown fuse with the correct amperage rating and verify the circuit functions properly.
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