P3066moderate severityPowertrain
Transmission Range Sensor Rationality Error
on 2007 Cadillac Escalade 6.2L V8 · 4WD
What this code means
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.
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Bluetooth code reader (~$25)
Veepeak OBDCheck BLE →
Pairs with your phone — reads and clears codes, live data.
Serious DIY (~$100)
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
Shop-grade tablet (~$300+)
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1