Code
P1693
MINI
P — Powertrain
Electronic throttle control monitor level 2/3 - motorised throttle control and fuel injection switch off B
Views:
UK: 2
EN: 6
RU: 27
AI status
Completed
Completed
100%
Causes
- Open/short or poor connection in throttle body power or motor wiring
- Faulty throttle body actuator (motor) or internal gears
- Failed throttle position sensor(s) or pedal position sensor mismatch
- Low battery voltage or intermittent supply to throttle control
- Corroded/loose ground(s) or connector pins
- ECU/engine control module software or hardware fault
Symptoms
- Malfunction Indicator Lamp (MIL) or warning lights illuminated
- Engine may enter limp mode with very reduced power
- Engine cranks but does not start or stalls shortly after start
- Throttle pedal has no effect or delayed/unpredictable response
- Stored fault codes related to throttle/pedal/ECU communication
- Possible intermittent loss of motive power or shutdown
What to check
- Read and record all stored and pending DTCs and freeze-frame data
- Check battery voltage (static and cranking) and charging system
- Inspect throttle body connector and wiring for damage, corrosion, pin push-out
- Check fuses and relays feeding the throttle body and ECU
- Measure power supply and ground at the throttle body connector
- Scan live data: throttle position sensor(s), pedal position sensors, motor command and feedback
Signal parameters
- Battery/supply voltage at throttle body: ~11–14.5 V (should be stable)
- Throttle position/pedal sensor voltages: typically 0.5–4.5 V (dependent on manufacturer)
- Motor drive command: PWM or variable duty signal from ECU (verify frequency with scope)
- Motor coil resistance: manufacturer-specific; check for open/short compared to spec
- No high-current draw or short to ground on the motor circuit during actuation
Diagnostic algorithm
- Connect a diagnostic scanner, record all codes and freeze-frame data, then clear codes and attempt to reproduce.
- Verify battery state of charge and charging system; ensure voltage is within specification before continuing.
- Visually inspect throttle body, connectors, wiring harness, and grounds for damage, corrosion, crushed wires or pin misalignment.
- Check fuses/relays related to throttle and ECU; replace if suspect.
- With ignition ON (engine off) measure supply voltage and ground at throttle body connector; confirm stable supply and good ground.
- Check throttle and pedal sensor voltages and compare multi-point readings to expected ranges; look for sensor mismatch or implausible values.
- Use a capable scanner to command throttle body actuation while observing motor response and current draw; note any abnormal noise or failure to move.
- Inspect for short-to-ground or short-to-power in motor wiring (resistance/continuity checks).
- If wiring and supply are good but actuator fails, replace or refurbish the throttle body assembly and retest.
- After repair or replacement perform throttle adaptation/learn procedure per factory instructions and clear codes; road test to verify.
- If fault persists with good throttle assembly and wiring, investigate ECU/software: reflash/update PCM, check for other module faults or replace control module as last resort.
Likely causes
- Damaged connector or wiring to the throttle body (most common)
- Throttle body actuator motor seized or electrically shorting
- Low/unstable battery voltage or poor ground affecting control
- Throttle position/pedal sensor disagreement causing safety shutoff
- Control module detected internal fault and disabled throttle/fuel
Fault status
Status
The engine control system detected a severe fault in the motorised throttle control and responded by disabling the throttle actuator and fuel injection for safety. Immediate inspection of throttle body, wiring, supplies, and ECU communication is required.
Repair difficulty: Medium
Diagnostic time: 1-4 hours
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