Transmission Range Sensor Rationality Error
2014-2021 BMW i3 Range Extender
Description
The transmission range sensor (TRS) reading does not agree with other inputs such as gear state solenoids and output shaft speed.
Symptoms
- Check Engine Light
- Incorrect gear displayed on dash
- Transmission may not shift out of park
- Backup lights on in drive
- Wrong gear engagement
- Intermittent no-start in Park
Common Causes
- TRS misadjusted
- TRS internal failure
- Shift linkage loose or worn
- TRS connector corroded
- TRS wiring short
Diagnostic Steps
- Compare TRS signal to actual gear selector position
- Inspect shift linkage adjustment
- Test TRS voltage in each gear position
- Check TRS connector
- Monitor TRS signal for dropouts
Repair Notes
Adjust or replace transmission range sensor. Check and adjust shift linkage. Verify correct gear display in all selector positions.
Related Codes
Other Powertrain Codes
- P0070Ambient Air Temperature Sensor Circuit
- P0071Ambient Air Temperature Sensor Range/Performance
- P0072Ambient Air Temperature Sensor Circuit Low
- P0073Ambient Air Temperature Sensor Circuit High
- P0115Engine Coolant Temperature (ECT) Sensor 1 Circuit
- P0116ECT Sensor 1 Circuit Range/Performance
- P0117ECT Sensor 1 Circuit Low Input
- P0118ECT Sensor 1 Circuit High Input
- P0119ECT Sensor 1 Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
P3066 on Other Vehicles
Common Questions
What does code P3066 mean on a 2014-2021 BMW i3?
P3066 stands for "Transmission Range Sensor Rationality Error". The transmission range sensor (TRS) reading does not agree with other inputs such as gear state solenoids and output shaft speed.
What are the symptoms of P3066 on a BMW i3?
Common symptoms of P3066 include: Check Engine Light, Incorrect gear displayed on dash, Transmission may not shift out of park, Backup lights on in drive, Wrong gear engagement, Intermittent no-start in Park.
What causes P3066 on a 2014-2021 BMW i3?
Common causes of P3066 include: TRS misadjusted, TRS internal failure, Shift linkage loose or worn, TRS connector corroded, TRS wiring short.