P0366 OBD-II Trouble Code: Camshaft Position Sensor "B" Circuit Range/Performance (Bank 1)

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0366 code

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.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0366 DIAGNOSTIC Get a fair and transparent estimate upfront

P0366 code definition

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.

What the P0366 code means

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.

What causes 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:

  • Faulty crankshaft sensor
  • Shorted or open wiring
  • Damaged electrical connectors
  • Faulty starter motor
  • Faulty starting system circuit
  • Dead or weakened battery
  • Open or shorted camshaft position sensor harness

What are the symptoms of the P0366 code?

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.

How does a mechanic diagnose the P0366 code?

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.

Common mistakes when diagnosing the P0366 code

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.

How serious is the P0366 code?

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.

What repairs can fix the P0366 code?

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.

Additional comments for consideration regarding the P0366 code

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.

Need help with a P0366 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.

P0366
trouble codes
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0366 code.

SCHEDULE P0366 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,156

Rating Summary
4,752
196
50
27
131
4,752
196
50
27
131

Al

21 years of experience
14 reviews
Al
21 years of experience
Nissan Pathfinder - Check Engine Light is on - Atlanta, Georgia
Al, was cool and very knowledgeable. Being direct and upfront always works. Al, is a credit to the company.

Xavier

10 years of experience
20 reviews
Xavier
10 years of experience
Chevrolet Equinox - Check Engine Light is on - Frisco, Texas
Xavier was GREAT!!! He made sure that I understood everything that he did to my vehicle and answered all my questions. Very thorough and even worked thru the light rain that we had. When I have to use this service again, I hope to be able to request him!

Luis

14 years of experience
52 reviews
Luis
14 years of experience
Kia Sorento - Check Engine Light is on - Las Vegas, Nevada
Luis did an excellent job in determining that this was a warranty issue on bad parts. He has integrity and is good at what he does. I would highly recommend him for any auto repairs that come up.

Reginald

36 years of experience
32 reviews
Reginald
36 years of experience
BMW 325i - Check Engine Light is on - Los Angeles, California
Reginald was incredibly helpful in helping me to diagnose several issues in my car, as well as repair issues to help me pass a break and light test. He even went so far as to come to the brake and light testing location so that he could ensure that the car passed and be there if anything else needed to be fixed on the spot. Absolutely would recommend him to anyone who is looking for an honest and knowledgeable mechanic!


More related articles

P3478 OBD-11 Trouble Code: Cylinder 10 Exhaust Valve Control Performance
What What the P3478 code means When starting your vehicle, and when the vehicle is operating under a heavy weight, the engine will work in V8 mode. But when driving conditions are light, the engine will disable 4 of the...
P0702 OBD-II Trouble Code: Transmission Control System Electrical
P0702 means a problem with the automatic transmission control system. Problems may include transmission failure, overheating and difficulty shifting.
P0631 OBD-II Trouble Code: VIN Not Programmed or Incompatible – TCM
P0631 means the transmission control module failed to recognize the VIN, often due to a damaged PCM or module-related wiring.

Related questions

The airbag light is on, could it be caused by previous work done on the car?

The SRS (Airbag) light comes on when the controller has sensed a malfunction somewhere in the system. The malfunction may be an open circuit or an incorrect voltage at any of the sensors. When the controller sees the error, it...

Check engine light on

There area number of things that can cause a misfire such as low fuel pressure, vacuum leaks, faulty spark plugs or wires, a bad crankshaft position sensor, bad camshaft position sensor, faulty fuel injectors and many others. The most efficient...

Why my car has a little picture of the motor

This is a sign that the control module has detected a problem somewhere, in one of the vehicles systems. It will be necessary to connect a code reader to the vehicle and pull the diagnostic trouble codes to see what...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com