Clutch Pedal Switch Circuit High
The P0835 code indicates that the Powertrain Control Module (PCM) has detected a high voltage signal from the clutch pedal position sensor or switch circuit. This typically means the circuit is shorted to voltage or the switch is stuck in the closed position, preventing the PCM from seeing a proper signal when the clutch is depressed. This can affect starting, cruise control, and other systems that rely on clutch position input.
1. Symptoms You Will Notice
- Engine may not start unless clutch is depressed
- Cruise control may not engage or disengage
- Check Engine Light illuminated
- Possible stalling when clutch is released
2. Most Common Causes
- Faulty or internally stuck-closed clutch pedal position switch B
- Short to battery voltage (B+) in the switch circuit wiring
- Corroded, wet, or bent pins in the switch connector causing an unintended connection to positive voltage
- Excessive resistance or open circuit in the switch ground line (if the circuit uses a pull-down configuration)
- Internal PCM/ECM failure in the input circuit detection
3. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P0835 is present.
Step 2: Visually inspect the clutch pedal switch and wiring for damage or corrosion.
Step 3: Test the switch operation with a multimeter; check for continuity when pressed and open when released.
Step 4: Check for voltage at the switch connector; should be 5V or 12V reference, not battery voltage.
Step 5: If wiring and switch are okay, test the PCM input for proper signal.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It may be safe to drive short distances, but the vehicle may not start or cruise control may not work. It's best to diagnose and repair promptly.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the cause and labor rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.