P0831 OBD-II Trouble Code: Clutch Pedal Switch "A" Circuit Low

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0831 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0831 code

P0831 is a diagnostic trouble code (DTC) for "Clutch Pedal Switch "A" Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0831 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

What the P0831 code means

In vehicles with manual transmissions, the clutch position sensor (CPS) is also sometimes called the clutch start switch, clutch safety switch or clutch interlock switch since it needs to be closed before the starter can engage, in order to prevent the vehicle from being started while in gear. `A P0831 code means that the powertrain control module (PCM) has registered a malfunction with the clutch position sensor.

What causes a P0831 code?

Most commonly, a P0831 code is due to a failed or mis-adjusted CPS . Other causes might include problems with wiring or electrical connectors, such as open circuits, shorts or corrosion.

What are the symptoms of a P0831 code?

Symptoms may not present themselves at all, or could include:

  • No-start condition
  • Engine can start without the clutch depressed
  • Stored code
  • Illuminated malfunction indicator lamp (MIL)
  • Inoperative cruise control

How does a mechanic diagnose a P0831 code?

A scan tool/code reader and digital volt/ohmmeter (DVOM) will be needed for diagnosis and repair. The DVOM may be the more useful, as it can show the technician what the clutch pedal switch is actually doing and not just what the PCM registers. A repair manual for the vehicle and factory wiring diagram can help show the exact location of the switch.

  • Check to ensure all connectors are properly seated in place and there is no corrosion, water infiltration or bent/backed out pins. Any of these can increase resistance and prevent the ECM from recognizing a signal. Repair/replace as needed.

  • With the parking brake set, disconnect CPS sensor “B.” Use your DVOM to measure continuity and check the sensor’s response with the clutch pedal depressed or released. Check your repair manual to find out if the CPS should read “open” or “closed” in each position, as this can vary from model to model.

  • If resistance does not change with the pedal released or depressed, it could be a problem with the switch. If the switch is adjustable, you may be able to position it closer to the pedal. If the switch is open or internally shorted, it will need to be replaced.

  • If resistance across the switch in each position is within spec, the problem may be in the circuit. Disconnect the appropriate connector at the PCM and reconnect the CPS sensor. Repeat the resistance check at the PCM connector.

  • If resistance does not change with the clutch depressed or released, the problem is likely in the wiring harness. Disconnect the CPS and recheck. A short circuit or any kind of resistance may interfere with the CPS.

  • If resistance changes as it should, the PCM may be reporting a false circuit problem. See remarks.

Common mistakes while diagnosing P0831 code

Often, a no-start condition with the P0831 code is misdiagnosed as a problem with the starter.

How serious is a P0831 code?

A P0831 code can result in:

What repairs can fix a P0831 code?

Replacement or adjustment of CPS, or replacement/repair of corroded or damaged wiring to CPS.

Additional comments for consideration for P0831 code

Some drivers have the bad habit of “riding the clutch,” with one foot on the clutch even when it’s fully released. A foot that is only slightly on the clutch pedal can be enough to prevent the CPS from sensing that the clutch is released, resulting in a P0831 code. It has also been reported that in some General Motors models, the PCM may not recognize CPS switches in rapid succession. In other words, by pressing and releasing the clutch a few times, the PCM may fail to recognize further switches from the CPS, resulting a P0833 code.

Need help with a P0831 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

P0831
trouble codes
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0831 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,526

Rating Summary
3,215
155
41
23
92
3,215
155
41
23
92

Jason

14 years of experience
427 reviews
Jason
14 years of experience
2004 BMW 330CI - CHECK ENGINE LIGHT IS ON - OAKLAND, CALIFORNIA

Diego

18 years of experience
208 reviews
Diego
18 years of experience
Excellent service helpful when discussing other issues about car will use him again!
2010 FORD F-150 - CHECK ENGINE LIGHT IS ON - PEORIA, ARIZONA

Danny

17 years of experience
32 reviews
Danny
17 years of experience
great experience
2003 TOYOTA CAMRY - CHECK ENGINE LIGHT IS ON - SEABROOK, NEW HAMPSHIRE

Patrick

8 years of experience
83 reviews
Patrick
8 years of experience
I like him a lot! He’s punctual and do a great job!
2015 CHEVROLET CRUZE - CHECK ENGINE LIGHT IS ON - SCOTTSDALE, ARIZONA

More related articles

How Long Does a Throttle Return Spring Last?
Not all vehicles on the road feature an electronic throttle control (ETC), which is also called drive-by-wire. For vehicles that don't offer this system, they have a throttle cable instead that...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....

Related questions

Q: Car cut off on the highway and never started back up.

Hello there, many faults will cause your 2004 Chevrolet Impala to die while running and not restart. The P0443 code is for the Evaporative Emission Control System Purge Control Valve Circuit and though this will need to be addressed will...

Q: Exhaust fumes leaking into the car

This concern could be caused by a cracked exhaust manifold. Is the Check Engine light on? If so, a certified, local mechanic, like one with YourMechanic, could diagnose the problem with a scan tool. Due to the poisonous nature of...

Q: Sputtering, misfiring, power loss and gain

Hey there: There are usually two different mechanical problems that cause the symptoms you're describing with your Pontiac Firebird. The first and most common is a problem with the ignition coil, (especially in mid-90's GM V-6 engines) or due to...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com