AutoCodes – Ford – P0390 Ford

P0390 Ford Code - Camshaft Position Sensor 'B' Circuit Bank 2

Quick Answer

The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. Common causes include Faulty Camshaft Position Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0390 Ford indicates Camshaft Position Sensor 'B' Circuit Bank 2.
Common causes: Common causes include Faulty Camshaft Position Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 28,113

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0390 Ford Description

The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module (ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.

OBDII Code P0390 Ford - Camshaft Position Sensor 'B' Circuit Bank 2 - AutoCodes.com — P0390 Ford Code - Camshaft Position Sensor 'B' Circuit Bank 2

What does this mean?

What are the Possible Causes of the DTC P0390 Ford?

Faulty Camshaft Position Sensor
Camshaft Position Sensor harness is open or shorted
Camshaft Position Sensor circuit poor electrical connection
Faulty starter motor
Starting system circuit
Dead (Weak) battery

How to Fix the DTC P0390 Ford?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Sometimes and in some models, low battery voltage or a weak starter can trigger a Camshaft Position Sensor code.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0390 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0390 Ford code?

Need more information on how to fix the P0390 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0390 Ford code diagnosed by a professional: Find a repair shop in your area

Information for Specific Ford Models

P0390 2006 Ford Fusion — Camshaft Position Sensor 'B' Circuit Bank 2
P0390 2007 Ford Fusion — Camshaft Position Sensor 'B' Circuit Bank 2
P0390 2008 Ford Fusion — Camshaft Position Sensor 'B' Circuit Bank 2
P0390 2009 Ford Fusion — Camshaft Position Sensor 'B' Circuit Bank 2
P0390 2010 Ford Fusion — Camshaft Position Sensor 'B' Circuit Bank 2
P0390 2011 Ford Fusion — Camshaft Position Sensor 'B' Circuit Bank 2
P0390 2012 Ford Fusion — Camshaft Position Sensor 'B' Circuit Bank 2

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.