P1390low severityPowertrain
Octane Adjust Pin Out of Self-Test Range
on 2021 Lincoln Aviator 3.0L V6 Twin Turbo · AWD
What this code means
The octane adjust pin signal is not within the expected range during the self-test. This pin allows the PCM to adjust timing for different octane fuels.
Symptoms
- Check Engine Light
- Possible spark knock with low-octane fuel
- Self-test failure
Common causes
- Faulty octane adjust shorting bar
- Wiring issue
- PCM connector problem
Diagnostic steps
- Check octane adjust pin/shorting bar
- Inspect PCM connector
- Verify proper pin configuration for fuel grade
Repair notes
Check octane adjust shorting bar on PCM connector. Repair wiring if damaged.
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