P0807Generic code

P0807 Code: Clutch Position Sensor Circuit Low

The P0807 code means the clutch position sensor signal is below its minimum value. The main effect is a clutch the computer cannot control, or a start-stop system that is turned off. A signal wire shorted to ground or a missing reference is the usual cause.

Severity
High
Can I keep driving?
Yes, but with caution
Estimated cost
$60 to $600
Difficulty
Medium
System
Transmission
Applies to
All OBD2 vehicles

Updated Reviewed by Renzo Chacca

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What the P0807 code means

On automated manual transmissions and on some vehicles with start-stop, a sensor measures the exact position of the clutch (or of the pedal). The computer uses it to control how the clutch engages, or to know when to restart the engine.

The sensor receives a 5 V reference and a ground from the computer and returns a signal of roughly 0.5 to 4.5 V. A low signal, which sets the P0807 code, is usually caused by the signal wire shorted to ground or by a missing reference.

If the signal fails, the automated transmission cannot control the clutch and goes into limp mode, or the start-stop system stops working.

To confirm it, unplug the component with the key on and watch what happens to the reading or the code. If the value jumps to the opposite extreme, the wiring is good and the component is the one pulling the signal to ground. If nothing changes, look for the short in the wire, starting where the harness rubs against the engine, the chassis or the exhaust.

P0807 code symptoms

  • Check engine light on.
  • Clutch not controlled, or start-stop disabled.

Likely causes of the P0807 code

  1. Signal wire shorted to ground because the harness rubs against the engine, the chassis or a bracket.
  2. Power reference shorted. If several sensors fail at once, suspect the shared reference.
  3. Damaged sensor with an internal short.
  4. Connector with water or corrosion, which creates a path to ground.

How to diagnose the P0807 code step by step

  1. Read the sensor value on the scan tool and compare it with what is expected.
  2. Inspect the connector for corrosion, water or loose pins.
  3. Check power and ground with the key on: a correct reference and less than 0.1 V of drop on the ground.
  4. Measure the signal with the connector plugged in and see whether it changes with the condition.
  5. Do the wiggle test on the harness with the scan tool in graphing mode.
  6. Check the continuity of each wire up to the computer (under 1 ohm).
  7. Run the clutch touch point relearn after the repair, if it is an automated manual transmission.

How to fix the P0807 code

  • Repair the connector or the wiring.
  • Replace the sensor if the tests confirm it.
  • Correct the real condition, if there is one.
  • Clear the codes and verify with a road test.

Technical reference data

  • 5 V reference, ground and a signal of 0.5 to 4.5 V.
  • These are approximate values: check the manufacturer data for your vehicle.

Brand-specific notes

The letter assignment and the location of the component change from one manufacturer to another, so check the manual for your vehicle.

Frequently asked questions about P0807

What does the P0807 code mean?
It is a generic OBD2 code that means the clutch position sensor signal is below its minimum value. That usually points to a signal wire shorted to ground or a missing reference.
Can I drive with a P0807 code?
Yes, with caution. With a P0807 code an automated manual transmission may go into limp mode, or the start-stop system may stop working, so keep trips short until it is repaired.
Does the sensor have to be replaced?
Only if the tests confirm it. The connector and the wiring fail just as often.
What does the clutch position sensor do?
On automated manual transmissions and on some vehicles with start-stop, a sensor measures the exact position of the clutch (or of the pedal). The computer uses it to control how the clutch engages or to know when to restart the engine.
How much does it cost to fix P0807?
As a rough guide, between $60 and $600.
Will a P0807 code clear itself?
Not if the wire is shorted to ground or the sensor is damaged. If the short was a brief contact, the light can go out, but the code will probably return.
What is the most common cause of P0807?
A signal wire shorted to ground where the harness rubs against the engine, the chassis or a bracket. A connector with water in it is next.

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