Code
P1241
MITSUBISHI
P — Powertrain
Torque monitor
Views:
UK: 7
EN: 14
RU: 10
AI status
Completed
Completed
100%
Causes
- Faulty torque sensor or torque estimation circuit (manufacturer-specific sensor)
- Throttle position sensor or electronic throttle control faults
- Accelerator pedal position sensor faults or signal mismatch
- MAF/MAP or boost sensor errors causing incorrect torque estimation
- Injector or ignition faults (misfire, low fuel pressure) reducing actual torque
- Wiring harness damage, poor connectors, or grounding issues to sensors/ECU
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated
- Reduced engine power or limp-home mode
- Poor or delayed acceleration, hesitation under load
- Rough idle or stalling in some cases
- Unusual transmission behavior if torque-converter/torque data used for shifting
- Inconsistent RPM response to accelerator input
What to check
- Read and record freeze frame and all stored DTCs with a capable scan tool
- Check live data: commanded/requested torque vs. estimated/actual torque (if available)
- Verify related sensor data: accelerator pedal position, throttle position, MAF/MAP, intake/boost pressure, engine speed, fuel rail pressure
- Inspect wiring and connectors for the torque sensor, throttle body, pedal sensors, MAF/MAP for damage or corrosion
- Check battery and charging system voltage and engine grounds
- Perform basic engine health checks: compression test, fuel pressure, ignition spark
Signal parameters
- Requested/commanded torque (Nm or % of max)
- Estimated/actual torque (Nm or %), if available from ECU
- Engine speed (RPM)
- Throttle angle or electronic throttle position (%)
- Accelerator pedal position (%) and pedal correlation between sensors
- Mass air flow (g/s) or intake manifold pressure (kPa)
Diagnostic algorithm
- Connect a diagnostic scanner and record all codes and freeze-frame data; note operating conditions when fault set
- Compare commanded/requested torque and actual/estimated torque on live data during a controlled test (non-road or dyno)
- Verify accelerator pedal and throttle position sensor correlation; check for DTCs related to pedal/chassis
- Inspect wiring, connectors and grounds for torque-related sensors; repair any damage and retest
- Check MAF/MAP and boost sensors for correct readings; clean or replace contaminated MAF if needed
- Measure fuel pressure and perform ignition checks; address misfires or low fuel pressure
- Perform compression/leakdown if mechanical output is suspected low
- If wiring and sensors good, check for ECU software updates or reflash; consider ECU/torque-sensor replacement only after other causes excluded
- Clear codes and perform test drive under conditions similar to freeze-frame to verify repair
Likely causes
- Open/short in sensor wiring or corroded connector to torque/torque-related sensors
- Faulty accelerator pedal or throttle position sensor causing incorrect torque request
- MAF sensor contamination or MAP sensor failure leading to wrong air mass reading
- Fuel pressure regulator or injector problems reducing engine output
- ECU receiving implausible signals due to poor ground or low battery/charging voltage
- Turbo boost control or wastegate fault (on turbocharged engines)
Fault status
Status
Torque monitor fault — ECU detected unacceptable difference between commanded and actual/estimated engine torque. May cause MIL and reduced performance.
Repair difficulty: Medium
Diagnostic time: 1-4 hours
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