P0365 OBD-II Trouble Code: Camshaft Position Sensor B Circuit (Bank 1)

check engine light

P0365 code definition

The P0365 code means that the car’s computer has detected a fault in the camshaft position sensor B in bank 1.

What the P0365 code means

Essentially, the P0365 code means that there has been a lack of voltage detected from the camshaft position sensor B in bank 1 by the PCM within a few seconds of the engine starting. The camshaft position sensor notes the rate at which the camshaft is spinning, and helps the car’s computer control things like fuel injection and engine timing. Note that the “B” means that this sensor is located in the exhaust side of the cylinder head. Bank 1 means that the sensor is located in the engine bank with cylinder 1.

What causes the P0365 code?

There are many potential underlying causes for the P0365 code, including the following:

  • A faulty camshaft position sensor
  • Oil leaking onto the sensor and damaging wiring or corroding connections
  • Short or open in the sensor circuit
  • Faulty PCM (rare)
  • Crankshaft position sensor failure (replace with the camshaft position sensor as a set)

What are the symptoms of the P0365 code?

It is possible to experience several different symptoms with the P0365 code, including:

  • Check Engine Light on
  • Loss of power during operation
  • Lack of power
  • Engine misfiring (running rough)
  • Hard starting
  • No start
  • Engine stalling

How does a mechanic diagnose the P0365 code?

The first step in diagnosing the P0365 code is to connect an OBD-II scanner to the car’s computer and check all the codes stored. The mechanic will then need to clear the codes and test drive the vehicle to see if the code is reset.

Next, the mechanic should inspect the wiring and connections to the camshaft position sensor. Any damaged wiring should be repaired or replaced, and loose or corroded connections will need to be repaired as well. It may be necessary to pull the sensor from the engine and test it for resistance.

If an oil leak is responsible for damaging the sensor, the wiring or the connectors, the oil leak will need to be repaired to prevent the same situation from recurring. Note that if the crankshaft sensor has also failed (usually due to the same oil contamination), it should be replaced with the camshaft sensor.

The mechanic should also inspect and diagnose the PCM. While rare, a faulty PCM can also cause the P0365 code, and may need to be replaced in some instances.

Common mistakes when diagnosing the P0365 code

One common mistake here is attempting to replace the camshaft position sensor without first diagnosing the entire circuit. The P0365 code applies to the whole circuit, which means the problem could be within the wiring, connections or even the PCM, not just the sensor. Another issue many mechanics note is that using inferior replacement parts often leads to sensor failure soon after the repair has been made.

How serious is the P0365 code?

The P0365 code is serious, as the condition will affect the drivability of the vehicle. In a best-case scenario, you may notice hesitation or sluggish acceleration. In a worst-case scenario, the engine will stall during operation, or may not start at all. Have it inspected and diagnosed as soon as possible.

What repairs can fix the P0365 code?

The most common repair to fix the P0365 code is replacement of the sensor, along with a repair of the oil leak responsible for contaminating the sensor in the first place. However, wiring damage and corroded connectors are also often common culprits (and often fail due to the aforementioned oil leak).

Additional comments for consideration regarding the P0365 code

It is important to repair the underlying problem with the P0365 code, not just parts that have failed as a symptom of that condition. Fluid leaks (generally oil) are the prime culprits here.

Need help with a P0365 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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