P0835 — Clutch Pedal Switch "B" Circuit High

P0835 — Clutch Pedal Switch "B" Circuit High. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit, blown fuse feeding the circuit.

powertrain (engine/transmission)

Is it safe to drive?

Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm P0835 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the clutch pedal switch "B" for damage, corrosion, chafing or poor contact.
Subsystem check With the clutch pedal switch "B" disconnected, measure signal voltage at the harness connector: a high reading with the component unplugged indicates a short to power in the harness; if it drops to normal, the component itself is faulty.
Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P0835 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P0835 (parts and labor, USD, independent shop rates): Control module repair: $300–$1,000; Replace the faulty sensor or actuator: $150–$500; Repair wiring or connectors: $80–$250. Overall, fixing P0835 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

Is it safe to drive with P0835?

In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

What is the most common cause of P0835?

The most common causes are: faulty sensor or actuator of the affected circuit, open or shorted wiring in the circuit, blown fuse feeding the circuit.

Will P0835 clear itself?

Sometimes P0835 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What does OBD2 code P0835 mean?

What are the symptoms of P0835?

Drivers most often notice: possible limp mode depending on the affected component, Check Engine Light on, increased fuel consumption in some cases, the affected system operates intermittently or not at all.

Your scan tool is reporting P0835, and now you're wondering what that means for your vehicle. This diagnostic trouble code belongs to the powertrain category, specifically addressing the clutch pedal switch "B" circuit. When the engine control unit detects a voltage signal that exceeds normal operating parameters on this particular circuit, it stores P0835 and illuminates the check engine light.

The clutch pedal switch tells the control module whether the clutch is pressed or released. This input feeds several systems: the starter interlock, the shift lock mechanism on automatics, and sometimes the traction or stability control. When P0835 appears, the control unit has seen the signal voltage on the clutch pedal switch "B" circuit stay above the acceptable range—usually near battery voltage instead of the expected low or ground signal. That condition can stem from a short to a power source, an interrupted ground path, or a faulty switch pulling the line high. The module does not set P0835 from a single bad reading; it requires the fault to appear repeatedly under specific driving conditions before activating the warning light. The freeze frame data saved alongside P0835 captures engine load, RPM, temperature, and speed at the moment of failure—use that information to reproduce the problem during testing.

Common Symptoms of P0835

The check engine light is illuminated
The vehicle may enter a limited-performance or limp-home mode depending on which system relies on this input
Reduced fuel efficiency in some applications
The affected circuit operates inconsistently or stops working entirely
Possible interference with starter engagement or gear shifting behavior
Symptoms can fluctuate based on the position of the clutch pedal

What Causes P0835?

The most frequent culprit behind P0835 is an open ground return at the clutch pedal switch "B" connector. Without a solid ground, the signal line floats high and triggers the code. Beyond that, several other failure modes can produce the same result:

Signal wire shorted directly to battery positive voltage
Clutch pedal switch "B" internally failed and pulling the circuit high
Blown fuse feeding power to the switch circuit
Corroded, loose, or damaged connector terminals in the harness
Wiring harness with an open or shorted conductor
Poor supplemental ground connection at the chassis
Control module output driver fault (less common)
Faulty sensor or actuator sharing this circuit

How to Diagnose P0835

A systematic approach keeps you from replacing good parts. Follow these steps in order:

Connect your OBD2 scanner and verify P0835 is stored. Save the freeze frame data—this snapshot tells you engine load, RPM, coolant temperature, and vehicle speed when the fault occurred. Recreate those exact conditions during your road test after repairs.
Pull all stored codes, not just P0835. Related codes often expose the root cause or show which circuit is the primary failure. Check for manufacturer TSBs related to this code on nhtsa.gov or your brand's technical site—factory-known issues sometimes have dedicated software updates.
Inspect the wiring harness and connectors at the clutch pedal switch "B" thoroughly. Look for chafed insulation, broken strands, moisture intrusion, greenish corrosion, or terminals that are pushed out of position.
With the switch disconnected, probe the signal wire at the harness side. If you still read near-battery voltage with the component unplugged, the harness itself has a short to power. If the voltage drops to normal, the switch is the source of the problem.
Measure reference voltage, ground resistance, and signal continuity at the switch connector. All three readings must be within specification for proper operation.
Perform a wiggle test on the harness while monitoring live data. Any signal dropout points to a broken wire that only makes contact when the loom is in a certain position.
Clear P0835, complete a full drive cycle that includes the conditions from the freeze frame, and verify the code does not return. A code that stays clear confirms the repair.

Repair Options for P0835

Target the least expensive and most probable causes before spending money on major components:

Wiring or connector repair: $80–$250
Clutch pedal switch "B" replacement: $150–$500
Control module diagnosis and repair: $300–$1,000

How Much Does It Cost to Fix P0835?

Actual repair cost hinges on which part has failed. Here are typical parts-and-labor scenarios at independent shops in the United States. Wiring issues—the most affordable fix—run $80–$250. If the switch itself is faulty, expect to pay $150–$500 for the part plus labor, depending on your vehicle. Control module work is the priciest path, ranging from $300–$1,000 depending on whether the module can be repaired or must be replaced.

In practice, most P0835 repairs fall between $80 and $1,000. Spending time on accurate diagnosis before purchasing parts pays off—the most expensive scenario should never be your first assumption.

Can You Drive with P0835?

In most vehicles, the car remains drivable with this code stored. You may notice reduced performance, a disabled auxiliary function, or intermittent operation. Treat P0835 as urgent only if you experience stalling, failure to start, or warnings related to brakes and steering. Otherwise, schedule service at your earliest convenience.