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P0366 is a diagnostic trouble code (DTC) for "Camshaft Position Sensor "B" Circuit Range/Performance (Bank 1)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
The P0366 code is defined as an incorrect voltage reading from the camshaft position sensor circuit, specifically for the engine bank 1 camshaft sensor B.
In order to control fuel injection and ignition, the ECM detects the rate at which camshafts spin through camshaft position sensors. These sensors send a signal to the ECM within the first few seconds of ignition. The ECM compares the data to the manufacturer’s specifications, and if the values are off by more than 10% (either high or low), the ECM assumes that there is a fault in the camshaft. The signal is sent to the PCM, which stores the P0366 code.
The most likely cause of an abnormal voltage reading in the camshaft position sensor circuit is oil or engine fluid that has leaked onto electrical components and caused shortages, or has caused the camshaft position sensor to go bad.
Other causes may include:
In addition to the illumination of the Check Engine light, the P0366 code will usually be preceded by delayed engine starting, an inability to accelerate smoothly, rough idle, an overall decrease in engine performance, or a stalled engine.
After an OBD-II scanner verifies the P0366 code, a mechanic should begin with a visual inspection of all the wiring, connectors, and other electrical components. Any damaged elements should be replaced, reconnected, or repaired as necessary. They should then clear the code and retest the system. If the code is stored in the PCM again, there is a fault that needs a more in-depth diagnosis and repair.
If the PCM has stored the P0366 code, technicians may immediately assume that the camshaft position sensor, or the sensor circuit, is faulty, and will replace these items before performing a thorough diagnosis. However, the most common cause of this code may be an oil leak or engine fluid leak, and replacing these parts will result in the code returning once the liquid has damaged the new parts.
If the P0366 code is being detected, it is important to seek a repair as soon as possible. Without the ability to properly control fuel injection and ignition, the vehicle will not perform as it should. In addition to decreased power and rough handling, the car may simply lose power altogether and enter a no start condition. Repairing the cause of this code is important for maintaining driveability.
There are many ways that a technician can address a P0366 code detection. They include:
After each repair is attempted, the code should be cleared from the PCM and the system should be retested. This procedure helps pinpoint the exact cause of the code, and ensures that the system has been properly repaired.
When replacing camshaft position sensors, sensor circuits, or other components, most manufacturers recommend replacing the same part in the crankshaft system. These parts work best when they have the same amount of wear.
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.