P1725 · blink 37 – NC REVOLUTION SENSOR MALFUNCTION (INPUT TURBINE SPEED SENSOR)
- System
- ECT U441E
- Dashboard light
- CHECK ENGINE (MIL) does NOT light (DTC stored in memory only)
- Applies to
- 4-speed A/T U441E. Not a PK fitment (the PK EPC lists only A246E and U340E). Other-market fitment unverified.
- Check-engine blink code
- 37
- Description
- NC REVOLUTION SENSOR MALFUNCTION (INPUT TURBINE SPEED SENSOR)
- Detection / symptoms
- Detection: The Engine and ECT ECU detects conditions (a), (b), (c) and (d) continuity for 5 secs or more. (1−trip detection logic) (a) Vehicle speed : 50 km/h (20 mph) or more (b) 2nd, 3rd or O/D gear (c) Solenoid valves and neutral start switch are normal (d) NT < 300 rpm
- Possible causes
- Wire harness; Input turbine (NT) speed sensor; Engine ECU
- What to check
- Workshop check order (RM821E): INSPECT TRANSMISSION REVOLUTION SENSOR(NT) -> CHECK WIRE HARNESS AND CONNECTOR(Input Turbine Speed Sensor(NT) −
- Confidence
- high (official Toyota RM821E)
From the factory service material. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights