P0807

Clutch Position Sensor Circuit Low

P0807 is a generic OBD-II powertrain diagnostic trouble code: Clutch Position Sensor Circuit Low. It is logged by the engine control unit when the powertrain monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P0807
Group
Powertrain
System
Powertrain
Severity
Warning (MIL on)
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What P0807 means

P0807 is a generic powertrain code that is stored when the engine or transmission control module sees a signal voltage from the clutch position sensor circuit that is below the lowest value the manufacturer considers possible. The module is not judging how the clutch feels or works here; it is judging the electrical signal itself. A reading pinned at or near the bottom of the range for longer than the calibrated time is treated as a short to ground, an open in the reference feed, or a failed sensor rather than as a real pedal position.

The code belongs to the clutch and starter-interlock side of the drivetrain, so it appears on manual-gearbox cars and on automated manual or twin-clutch gearboxes that use a clutch travel sensor. The sensor is normally a potentiometer or hall-effect device mounted on the clutch pedal box or on the clutch actuator, and its signal is used for start inhibition, cruise-control cancellation, idle and stall protection, shift-point strategy and, on automated gearboxes, clutch engagement control.

Because the module loses a trusted clutch signal, it usually falls back to a substitute value. That can mean the starter interlock behaves oddly, cruise control refuses to set, or an automated clutch engages more coarsely than normal. The related codes P0808 (circuit high) and P0810 (position control error) come from the same sensor and circuit.

Common causes

Most-frequently reported root causes when P0807 is logged.

  • 1
    Failed clutch position sensor with an internally shorted or open resistive track.
  • 2
    Signal wire shorted to ground or to a chassis earth point in the pedal-box harness.
  • 3
    Open circuit or high resistance in the sensor reference voltage supply from the control module.
  • 4
    Corroded, water-damaged or pushed-out pins in the sensor connector under the dash or on the gearbox.
  • 5
    Chafed or pinched wiring where the harness flexes near the clutch pedal or firewall grommet.
  • 6
    Sensor mounting or pedal-stop damage that lets the sensor sit outside its intended travel range.
  • 7
    Poor control-module ground causing a shifted reference for all pedal sensor readings.
  • 8
    Faulty engine or transmission control module, which is rare and only after all wiring tests good.

Symptoms drivers notice

Check engine light on with no obvious change in how the car drives.
Engine will not crank, or cranks without the clutch pedal being pressed on cars with a start interlock.
Cruise control refuses to set or drops out during clutch use.
On automated manual or twin-clutch gearboxes, jerky take-up or slow, harsh gear changes.
Occasional stalling when pulling away or coming to a stop.
Hill-start assist, stop-start or launch-assist features stop working.

How to diagnose P0807

A typical diagnostic flow when this code is present.

  1. 1
    Read all stored codes and freeze-frame data first, and note whether clutch, gearbox or start-interlock codes are stored alongside P0807.
  2. 2
    Watch the clutch position sensor signal on live data while slowly pressing and releasing the pedal, looking for a value stuck at the bottom of the scale or dropping out.
  3. 3
    Locate the sensor at the clutch pedal box or clutch actuator and inspect it, its mounting and the pedal stop for damage or misalignment.
  4. 4
    Unplug the connector and inspect both halves for corrosion, moisture, spread terminals and pushed-out pins, then reseat and retest.
  5. 5
    With the connector unplugged and ignition on, confirm the module supplies its reference voltage and a clean ground at the correct connector pins per the wiring diagram.
  6. 6
    Back-probe the signal wire and check it for a short to ground and for continuity to the module, wiggling the harness at the firewall and pedal pivot to provoke the fault.
  7. 7
    Only after the supply, ground and signal wiring test correct, compare the sensor's output sweep against the manufacturer specification before condemning the sensor or module.

Related powertrain codes

Frequently asked questions

Can I keep driving with P0807?

Usually yes, for short distances, because the fault is in a sensor signal rather than in the clutch itself. Be aware that the engine may refuse to crank next time you stop, and that cruise control and stop-start may not work, so get it looked at rather than relying on the car.

Will P0807 fail an emissions test?

The code itself is not an emissions fault, but in most inspection regimes an illuminated check engine light is an automatic failure regardless of which code caused it. It needs to be fixed and the light cleared before the test.

Is P0807 expensive to fix?

Often it is one of the cheaper drivetrain faults. A damaged connector or chafed wire is inexpensive to repair, and a clutch pedal position sensor is a modest part on most cars. It only gets costly on automated manual gearboxes where the sensor is built into the clutch actuator.

Does P0807 mean my clutch is worn out?

No. The code reports an electrical problem with the sensor that measures clutch pedal or actuator position, not clutch wear. A slipping or dragging clutch is diagnosed separately, although a sensor set up outside its correct travel range can make the clutch feel wrong.

Disabling P0807 in software

RaceTune can permanently disable P0807 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

ECU families we can disable P0807 on

We hold the DaVinci A2L disable definitions for these families, so the exact P0807 path and mask addresses are mapped. verified marks a confirmed disable definition. We support many more — upload your file and our identifier will match it automatically.

  • Bosch EDC17C66 verified
  • Bosch EDC17CP57 verified

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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