P0390 OBD Error Code: Problem & Solutions

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The P0390 is a trouble code which can be defined as Camshaft Position Sensor “B” Circuit Bank 2. This fault code would be stored in if the powertrain control module is not able to detect the camshaft position sensor signal within a few seconds of cranking.

If the P0390 fault code is stored, then it would start indicating that the powertrain control module has detected an abnormal or wrong voltage reading from the sensor B on the camshaft position sensor circuit in engine bank 2. When the sensor B is not working properly, then the teeth on the camshaft will interrupt its magnetic field, which would give the powertrain control module data about the position of the camshaft. This data would be then be used by the powertrain control module to calculate the fuel delivery as well as the ignition timing. If there would be an incorrect input, then these systems would not get proper calculations.

What causes this problem with the Camshaft Position Sensor “B” Circuit (Bank 2)?

• Faults in the camshaft position sensor
• Camshaft Position Sensor harness might be opened or shorted
• Bad electrical connection in the camshaft position sensor circuit
• Defects in the starter motor
• There can be some issues in the starting system circuit
• Weak car battery

1. Battery & Electrical System Parts - Did your mechanic just found out that there is some fault in the Car Battery & Electrical System Parts? Buy top notch Battery & Electrical System Parts from us at economical prices.
2. Crankshaft Position Sensor - A broken engine wiring connector can cause a lot of issues. It would be nice if you get it replaced on time.
3. Timing Belt - Everything is fine with the Crankshaft Position Sensor and still OBD code P0390 flashing? Then there is definitely some fault with the Timing Belt. Get it checked and replace if needed.
4. Powertrain Control Module - Powertrain Control Module is an important car part which should never be neglected. May be there is some fault in it due to which P0390 code may start flashing.
5. Fuel Injector - A faulty Fuel Injector can be troublesome. You can always rely on us as we have best auto parts for our customers.
6. Engine Control Module - P0390 code does not really end up spoiling your timing belt, but it might also accompany few Engine Control Module issues. We have best Engine Control Module with us.

We care for our customers and that’s why we can totally understand your problem. That’s the reason why we have listed out some major symptoms behind the flashing up of OBD Code P0390. They are mentioned here as follows:

Common Symptoms

• The car may not be able to start properly
• Vehicle cat start running roughly or may misfire
• Malfunction indicator lamp can start illuminating
• There can be loss of power when driving or might have a lack of power upon start
• Car engine might start stalling

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0390:

• You should replace or repair the camshaft position sensor
• The faulty crankshaft position sensor should be replaced
• If there are some issues in the powertrain control module, then it should be repaired or replaced

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Here are some steps which you should follow in order to diagnose this fault code:

While detecting the P0390 code with an OBD-II scanner, a mechanic should begin a visual inspection of the wires and connectors in the camshaft position sensor’s circuit. After repairing or replacing any damaged items in this system, they will clear the code and operate the vehicle. If the code remains clear, the problem is solved. Now if the problem is not solved, then they will then proceed to take further diagnostic steps to inspect and test the camshaft position sensor and the crankshaft position sensor, as well as the PCM if needed.

Common Mistakes When Diagnosing The P0390 Code

• It would be a big mistake to assume that the camshaft position sensor has the issue without actually checking for fluid leaks as well as other damage in the wiring or connectors.
• Due to this the problem would increase and would consume a lot of time as well as money