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P0083 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 1 Sensor 2)

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P0083 code definition

P0083 is a general OBD2 code indicating a issue with bank 2 intake valve control solenoid. This code may be seen with P0081 and P0082. The vehicle also has a bank 1 valve control solenoid.

What the P0083 code means

The DTC P0083 is telling us that there is a fault within the intake valve control solenoid circuit. The vehicle's variable valve timing system uses the ECM to control the valve solenoid.

When the ECU sends a signal and finds the circuit to have out of range performance a code is set. Once the code is set the car goes into a failsafe mode and disables variable valve timing. P0083 is telling us that the intake valve control circuit has detected high voltage in the system.

What causes the P0083 code?

  • ECU failure
  • Shorted or open wiring in the harness
  • Intake valve control solenoid bank 2
  • Faulty electrical connection or connector

What are the symptoms of the P0083 code?

P0083 usually has minor symptoms. When the ECM detects high voltage in the control solenoid circuit it puts the vehicle into a failsafe mode to protect the car from further damage. When this failsafe mode is set it disables the variable valve timing.

When the variable valve timing is disabled you may noticed poor acceleration or lower power, and a worse than normal fuel economy.

How does a mechanic diagnose the P0083 code?

P0083 should be a straightforward code for any qualified mechanic to diagnose. Listed are the steps and the proper order for them:

  • Uses a professional level scan tool that is installed into the DLC port to check for all of the OBD2 codes that are present

  • Checks all freeze frame data associated with the codes present which will be used later

  • Clears all of the codes

  • Takes the vehicle on a road test under the same conditions as found in the freeze frame data, including engine load, RPM, speed, coolant temp, and drive time

  • If the code reappears during test drive continue diagnosis, confirm sP0083 is present after a test drive

  • Performs a visual inspection of the wiring harness for the intake valve control solenoid bank 2, checks for any damaged, shorted, and broken wires

  • Checks for correctly installed and undamaged connectors while looking out for poor connections at any junction points

  • Uses the scan tool to observe the live datastream from the intake valve control solenoid and confirms it is out of range for sensor performance

  • If sensor is operating properly, performs a diagnostic test on the ECU, each manufacturer and model will have its own separate test procedure

Common mistakes when diagnosing the P0083 code

  • Most commonly mistakes occur when the steps are not followed in the exact order listed or steps are skipped.

  • Usually the solenoid itself is the cause of P0083, but this is no excuse to skip right up to replacing the solenoid before it has been tested and confirmed faulty.

How serious is the P0083 code?

P0083 is not usually a code that indicates serious issues. It should be no problem to drive to a safe location and a mechanic shop once the Check Engine Light is displayed on the dashboard. Though the symptoms are minor with this code, care should be taken while driving since decreased engine power and acceleration will be felt.

What repairs can fix the P0083 code?

  • Replacing bank 2 intake valve control solenoid
  • Replacing the ECU
  • Repairing a poor or faulty electrical connection
  • Replacing or repairing wiring harness

Additional comments for consideration regarding the P0083 code

The variable valve timing system is used to advance the vehicle's engine timing as needed using the ECM and both intake and exhaust control solenoid. This system is used to increase engine power, acceleration, and fuel economy and is a critical component in modern engines.

Vehicles seen with P0083 will have a left and right engine banks, known as bank 1 and 2. Bank 2 is generally the passenger side of the engine. THe intake valve control solenoid should be found near the intake portion of the cylinder head. Cars will have a V configured engine to have 2 cylinder banks such as a V6 and a V8.

A scan tool that allows live data to be viewed in real time will be required to properly diagnose this code. This type of scan tool is a professional level scan tool and shows important information such as voltage, on/off, ohms, and graphs of changes in sensor and solenoid valves over time. They are critical to be able to properly diagnose the solenoid.

Need help with a P0083 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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