Transmission Range Sensor Rationality Error
2012-2015 BMW 320i 2.0L I4 Turbo N20
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
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P3066 on Other Vehicles
Common Questions
What does code P3066 mean on a 2012-2015 BMW 320i?
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 320i?
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 2012-2015 BMW 320i?
Common causes of P3066 include: TRS misadjusted, TRS internal failure, Shift linkage loose or worn, TRS connector corroded, TRS wiring short.