Code
P1685
MINI
P — Powertrain
Electronic throttle control monitor level 2/3 - clutch torque max error
Views:
UK: 2
EN: 3
RU: 2
AI status
Completed
Completed
100%
Causes
- Intermittent or open/short in wiring or connector for clutch torque sensor, clutch pedal switch or related CAN/LIN bus
- Faulty clutch torque sensor or clutch module (if vehicle equipped)
- Faulty throttle body, throttle actuator or accelerator pedal sensors causing mismatched torque requests
- Poor battery/charging voltage or bad ground affecting sensor/ECU signals
- Mechanical clutch issues (slipping, binding, worn components) producing unexpected torque readings
- ECU software bug or calibration/learn values corrupted
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Reduced engine power or limp-home mode
- Poor or delayed throttle response
- Unexpected clutch engagement behavior or difficult gear changes (manual or automated manuals)
- Intermittent faults that clear and reappear
What to check
- Read all stored and pending DTCs, note freeze-frame and occurrence conditions
- Capture live data: accelerator pedal positions, throttle position, clutch torque signal, clutch pedal switch, engine speed, vehicle speed and battery voltage
- Check battery voltage and charging system under load
- Visual inspection of wiring harnesses and connectors for damage, corrosion or water ingress (throttle body, clutch sensor/module, ECU)
- Check for related communication errors on CAN/LIN bus
- Inspect mechanical clutch operation for slipping or binding where accessible
Signal parameters
- Accelerator pedal position (APP) sensor 1 and 2 (voltage/%)
- Throttle valve position (TPS) voltage/% and commanded throttle position
- Clutch torque sensor output (mV/V or Nm) or clutch module torque request
- Clutch pedal position/switch status
- Engine RPM and vehicle speed
- Battery voltage and ECU supply voltage
Diagnostic algorithm
- Retrieve and record all DTCs and freeze-frame data, then clear codes and attempt to re-create the fault while capturing live data.
- Verify battery voltage and ground integrity. Recharge or replace battery if voltage is low; ensure good chassis and engine grounds.
- Inspect connectors and wiring to throttle body, clutch torque sensor/module and pedal sensors. Repair any damaged wiring or corroded connectors.
- Monitor live signals for plausibility: compare APP vs TPS, and clutch torque vs engine/road load. Look for sudden jumps, offsets or loss of signal.
- Check CAN/LIN communications for errors that could corrupt clutch torque data. Repair bus faults before replacing sensors.
- Perform throttle body adaptation/learn procedure if prompted by manufacturer service information.
- If signals and wiring are good, test or replace the clutch torque sensor or clutch control module per OEM procedure. Re-test after replacement.
- If mechanical clutch issues are suspected (slip or binding), perform mechanical inspection and repair (adjust or replace clutch components) before replacing electronics.
- Check for and apply any available ECU or module software updates and perform required adaptations/calibrations.
- After repairs, clear codes and perform a road test to verify the fault does not return and confirm normal throttle and clutch behavior.
Likely causes
- Corroded/loose connector at clutch torque sensor or throttle body
- Failed clutch torque sensor or clutch control module
- Out-of-range accelerator pedal or throttle position sensor values (sensor drift or failure)
- Low system voltage during a torque event
- Incomplete throttle/clutch adaptation or missing software update
Fault status
Status
Electronic throttle control monitor level 2/3 — clutch torque signal out of range or max torque error. Stored when ECU detects clutch torque value or related signal is invalid, implausible or exceeds configured limits.
Repair difficulty: Hard
Diagnostic time: 1.5-3.5 hours
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