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P0363 Code – What Does It Mean & How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.


P0363 is the diagnostic trouble code “DTC” for a specific problem within the Camshaft Position Sensor B circuit that can be traced to high input. This code is part of the On-Board Diagnostics II (OBD-II) system used in modern vehicles to monitor and report issues with various engine components.


The P0363 code indicates that the Engine Control Module (ECM) has detected a higher-than-expected voltage signal from the Camshaft Position Sensor “B” circuit. This sensor is used to help the ECU monitor camshaft position and timing, which is important for correct engine performance and fuel efficiency.


A P0363 code may appear as a result of several circumstances, such as:

  • Camshaft Position Sensor “B” is broken.
  • Issues with the Camshaft Position Sensor “B” circuit’s wiring or connectors.
  • A camshaft that is faulty or damaged.
  • Problems with the timing chain or belt.
  • ECM-related issues (rare).


Common symptoms associated with a P0363 code may include:

  • Check Engine Light (CEL) illuminated on the dashboard.
  • Reduced engine performance or power.
  • Poor fuel efficiency.
  • Engine misfires or rough idling.
  • Stalling or difficulty starting the engine.


To diagnose a P0363 code, a mechanic or technician will typically perform the following steps:

  • Use an OBD-II scanner to retrieve the code and any other related codes.
  • Inspect the camshaft position sensor “B” and its wiring for visible damage.
  • Check the camshaft and timing components for proper alignment and wear.
  • Test the sensor’s voltage and resistance to ensure it’s functioning correctly.
  • Clear the code and take the vehicle for a test drive to see if the issue recurs.

Common mistakes

When handling a P0363 code, common errors include:

  • Not inspecting the wiring and connections before replacing the sensor.
  • Failing to check the timing and camshaft components for problems.
  • Assuming the only potential reason for the code is a malfunctioning sensor and dismissing all other options.

How serious is this?

The P0363 code shall be fixed immediately, as failure to do so will result in a loss of engine performance, poor fuel efficiency, and possible engine damage. It is desirable to inspect and repair this vehicle as soon as possible, while it may still be able to drive.

What repairs can fix the codeS?

repair manuals

A P0363 code repair might entail:

  • If the Camshaft Position Sensor “B” is determined to be broken, replace it.
  • Fixing or replacing broken connections or wires in the sensor circuit.
  • If the camshaft is found to be damaged, it should be realigned or replaced.
  • Addressing any timing chain or belt problems.
  • Occasionally, if the ECM is found to be the cause of the issue, it may need to be replaced.

Related codes

Related codes may include:

  • P0360 – Camshaft Position Sensor “B” Circuit Malfunction.
  • P0361 – Camshaft Position Sensor “B” Circuit Range/Performance.
  • P0362 – Camshaft Position Sensor “B” Circuit Low Input
  • P0364 P0364:- Camshaft Position Sensor “B” Circuit Intermittent


The P0363 DTC code indicates that there may be an issue with the “B” circuit of the camshaft position sensor, which can affect engine performance and efficiency. Preventing further damage and ensuring the vehicle operates correctly is an important issue that needs to be diagnosed and dealt with immediately. Depending on the particular cause of the code, these repairs may involve sensor replacement, circuit repair, a camshaft check, or component adjustment.

P0363 Code – What Does It Mean & How To Fix It