|Trouble Code||Fault Location||Probable Cause|
|P0810||Clutch position control error||Wiring, poor connection, ECM/PCM!TCM|
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What Does Code P0810 Mean?
OBD II trouble code P0810 is a generic code that is defined as “Clutch position control error”, and is set when the PCM (Powertrain Control Module) detects a fault, failure, or abnormal voltage or resistance in the clutch position sensor circuit. Note that this code apply applies to applications with manual transmissions.
As the code’s definition suggests, the clutch position sensor monitors the position of the clutch pedal when the ignition is turned on. In a fully functional system, the clutch position sensor interrupts the ignition circuit if the clutch pedal is not fully depressed, which prevents the engine from being started. This is intended as a safety measure to prevent the engine from starting until the engine is decoupled from the transmission by means of disengaging the clutch. In practice, this measure is analogous to the safety cut-out switch that prevents a vehicle with an automatic transmission from starting unless the gear selector is in either the “P” or “N” position.
The image below shows a typical clutch position sensor, such as might be found on many VW applications.
What are the common causes of code P0810 ?
Common causes of code P0810 could include the following-
- Defective clutch position sensor
- Maladjusted clutch position sensor
- Burnt, damaged, shorted, disconnected, or corroded wiring and/or connectors
What are the symptoms of code P0810 ?
Common symptoms of code P0810 could include the following-
- Stored trouble code and possibly an illuminated warning light
- The engine will start without depressing the clutch pedal
- In some cases, the start circuit may be deactivated until code P0810 is resolved
How do you troubleshoot code P0810 ?
NOTE: While the actual design and location of the clutch position sensor vary between makes and even models in the same model range, all clutch position sensor are of the simple “On-Off” type with a constant voltage on one terminal. Diagnosing and repairing this code is therefore relatively simple, so start the procedure with-
Record all fault codes present, as well as all available freeze frame data. This information can be of use should an intermittent fault be diagnosed later on.
Locate the clutch position sensor, as well as all associated wiring. Refer to the manual to determine the function and color-coding of all related wiring.
Use a digital multimeter set to VDC to check that there is a current on one terminal of the clutch position sensor. This current is usually equal to battery voltage, but be sure to refer to the manual to determine the specified current for the application. If the clutch position sensor is working as designed, there should be no current across the switch if the clutch pedal is not depressed. Replace the clutch position sensor if there is a current across the terminals when the clutch pedal is not depressed.
If the specified current is present on one terminal, and the sensor is not passing a current when the clutch pedal is not depressed, depress the pedal and check if the specified current reaches the other terminal. If it does, suspect a faulty starter or starter solenoid. However, make sure there are no blown fuses in the relevant circuit(s), and that all relays are working before condemning a starter motor or starter motor solenoid.
Perform a thorough visual inspection of all wiring between the clutch position sensor and the starter solenoid. Look for damaged, burnt, shorted, disconnected, or corroded wiring and/or terminals. Make repairs as required, and check to see if the engine starts.
If however, the specified current does not reach the output side of the sensor, depress the clutch pedal and check the sensors’ resistance. Compare the obtained reading with the value stated in the manual, and replace the sensor if its measured resistance does not agree with the stated value.
NOTE: If the sensor is replaced, make sure that it is adjusted so that the current across it is interrupted when the clutch pedal is in the at-rest position.
While the above diagnostic/repair steps will resolve code P0810 in nine out every ten instances, it is possible that an intermittent fault may cause the code to return. If this is suspected, repeat Step 5 until the fault is found and repaired, or refer the vehicle to the dealer or other competent repair facility for professional diagnosis and repair.
Codes Related to P0810
- P0805 – “Clutch Position Sensor Circuit”
- P0806 – “Clutch Position Sensor Circuit Range/Performance”
- P0807 – “Clutch Position Sensor Circuit Low”
- P0808 – “Clutch Position Sensor Circuit High”
- P0809 – “Clutch Position Sensor Circuit Intermittent”
- P080A – “Clutch Position Not Learned”