Skip the auto shop - Our mechanics make house calls

P0806 OBD-II Trouble Code: Clutch Position Sensor Circuit Range/Performance Malfunction

check engine light

P0806 code definition

The P0806 code means that the car’s computer has noted a malfunction in the clutch position sensor and/or sensor circuit.

What the P0806 code means

If your car’s computer has stored the P0806 code, it means there has been a malfunction with the clutch position sensor or sensor circuit. Note that this only pertains to vehicles with manual transmissions. If the code is present in a car with an automatic transmission, there is likely a problem with the PCM itself. This code indicates that the voltage reading from the clutch position sensor is either higher or lower than the automaker’s settings.

What causes the P0806 code?

The P0806 code can be caused by a number of potential problems, including the following:

  • Failure of the clutch position sensor
  • An open or short in the clutch position sensor circuit
  • A misadjusted clutch position sensor (often after replacement)
  • A loose or corroded connector or damaged wiring within the clutch position sensor circuit
  • A failed PCM (rare)

What are the symptoms of the P0806 code?

Symptoms of the P0806 code can vary greatly from one vehicle to another, but include the following:

  • No symptoms, including no Check Engine Light (code is stored as pending)
  • No start
  • Engine starts with the key turned and without the clutch pedal pushed in
  • Check Engine Light on

How does a mechanic diagnose the P0806 code?

The first thing a mechanic should do is check the codes stored in the car’s computer with a handheld OBD II scanner. Those codes should be recorded, and then cleared, and the vehicle should be test driven to determine if the codes will return. If they do not, it may be an intermittent problem.

The mechanic should then inspect the adjustment of the clutch position sensor. This is particularly true if the sensor was recently replaced, as maladjustment is a common cause of the P0806 code. It is also important for the mechanic to inspect the connections within the clutch position sensor circuit for corrosion, as well as checking for damaged or broken wiring.

A mechanic should test for voltage on both the input and output side of the sensor. If voltage is only present on the input side, the sensor itself is the issue (either incorrectly adjusted or failed), and will need to be readjusted or replaced. If there is voltage on both sides of the sensor, then the problem lies within the wiring harness and connectors. In very rare instances, the PCM may need to be replaced, but this is uncommon.

Common mistakes when diagnosing the P0806 code

Common mistakes made when attempting to diagnose the P0806 code include replacing the starter or the starter solenoid or relay. The no start condition that is often present can make it seem as though the issue is related to the starter, but this may not be the case. In this instance, replacing the starter, starter solenoid or starter relay will have no effect.

How serious is the P0806 code?

The severity of the P0806 code varies depending on the symptoms you’re experiencing. In some cases, you may not even see a Check Engine light. In others, the car won’t start. However, because it can affect the drivability of your vehicle, it is important to have it diagnosed and repaired as soon as possible.

What repairs can fix the P0806 code?

The most common repair for the P0806 code is replacing the clutch position sensor or readjusting the sensor. However, other repairs can include repairing damaged wiring, cleaning corroded connectors and (rarely) replacing the PCM.

Additional comments for consideration regarding the P0806 code

While the no start symptom often associated with the P0806 code may make it seem as though the starter is the problem, a proper diagnosis will show that it is the sensor or the sensor circuit in most instances.

Need help with a P0806 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem What the P0121 code means P0121 is a generic OBD-II code which indicates that the Engine Control...


Related questions

Q: AC failed and started running rough and the Check Engine Light came on. But NOW its fine.

I wouldn't concern yourself with the timing of your cars symptoms. When a car fails, I liken it to when a light bulb decides to burn out. It was just its time. Everything will eventually fail. I also would strongly...

Q: What Are the Top Transmission Problems That Should Never Be Ignored?

Ignoring problems with cars is like ignoring problems with teeth. Waiting longer usually just results in more pain and expense. Seeing transmission fluid on the ground under your vehicle should get your attention right away. Transmission fluid is usually reddish-brown....

Q: VTC problem - 2008 Infiniti FX50S

The engine control system uses the engine oil pressure to control the variable intake valve timing on this model. If the engine oil is low or very dirty it can trigger this type of fault and cause the system to...