P0806
Clutch Position Sensor Circuit Range/Performance Malfunction
Powertrain Transmission Control Clutch Sensor 🟡 Moderate — Fix within a week
💬
What This Actually Means
In plain language — no jargon

Your car's clutch position sensor is sending a signal that's outside the normal range, like a volume knob stuck in an unexpected position. The engine computer can't properly track where the clutch is, affecting shift quality and drivability.

⚡
Symptoms You May Notice
3 known symptoms for this code
Difficulty shifting gears or grinding noises when shifting
Check Engine Light illuminated
Transmission stuck in limp mode or reduced power
🔬
Embedded Systems Insight
What the ECU/ECM is actually computing

The ECM monitors the clutch position sensor's voltage signal to determine clutch engagement status. It expects a voltage sweep from low (clutch fully engaged) to high (clutch fully disengaged) as the pedal moves. If the signal stays erratic, out-of-range, or doesn't transition smoothly, a fault is triggered.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Sensor Voltage 0.5V–4.5V with smooth transition Stuck below 0.5V or above 4.5V; erratic jumping
Signal Rate of Change Linear sweep over 1–2 seconds No movement or rapid spikes/drops
🔧
Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Clutch Position Sensor Connector
Disconnect and inspect connector pins for corrosion, water damage, or loose terminals; clean with electrical contact cleaner.
2
Clutch Position Sensor Wiring Harness
Check for chafed, pinched, or damaged wires along the clutch pedal assembly and route; repair or replace damaged sections.
3
Clutch Position Sensor
Unbolt the sensor from the clutch pedal bracket and replace with a new or remanufactured unit if connector and wiring are clean.