Octane Adjust Pin Out of Self-Test Range
2016-2016 Ford Explorer 3.5L V6 EcoBoost
The 2016 Ford Explorer is equipped with a 3.5L V6 turbocharged gasoline engine. Below you'll find detailed p1390 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
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
- 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
P1390 on Other Vehicles
Common Questions
What does code P1390 mean on a 2016-2016 Ford Explorer?
P1390 stands for "Octane Adjust Pin Out of Self-Test Range". 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.
What are the symptoms of P1390 on a Ford Explorer?
Common symptoms of P1390 include: Check Engine Light, Possible spark knock with low-octane fuel, Self-test failure.
What causes P1390 on a 2016-2016 Ford Explorer?
Common causes of P1390 include: Faulty octane adjust shorting bar, Wiring issue, PCM connector problem.
Last updated: March 2026
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