Skip the auto shop - Our mechanics make house calls

P0020 OBD-II Trouble Code: Camshaft Position (A) Actuator Circuit (Bank 2)

Check Engine Light

P0020 code definition

Camshaft Position (A) Actuator Circuit (Bank 2)

What the P0020 code means

P0020 is the OBD-II generic code indicating that the engine control module (ECM) has determined that the bank 2 intake camshaft Oil Control Valve (OCV) has an open or short circuit. This happens during one drive cycle.

What causes the P0020 code?

  • The ECM has commanded the OCV to less than 80% duty cycle and output is 100%.
  • The ECM has commanded the OCV up to 70% and output is less than 3%.
  • The OCV or wiring to the bank 1 exhaust camshaft may be shorted out.
  • The OCV may have an open circuit or the wiring is open.

What are the symptoms of the P0020 code?

  • The Check Engine Light will come on.
  • The engine may have a hard start condition if OCV is shorted.
  • The engine will have a reduction in fuel mileage if the OCV is shorted or open.
  • The engine may run rough, hesitate or stall depending on if it has shorted or if it has an open OCV circuit.

Note: The symptoms will change depending on the camshaft position when the Variable Valve Timing (VVT) system stopped working.

How does a mechanic diagnose the P0020 code?

  • Visually checks the electrical connectors, wiring and OCV for any problems
  • Checks the computer codes then documents the freeze frame data for the code
  • The vehicle is tested to see if the codes come back
  • Checks OCV for correct resistance of approximately 6.9 to 7.9 ohms
  • Traces and repairs any shorts or open circuits in the wiring
  • Checks the system following manufacturer's pinpoint tests

Note: Follow the manufacturer's recommended pinpoint test to narrow down the problem if above checks do not narrow the problem down.

Common mistakes when diagnosing the P0020 code

Follow these simple guidelines to help with diagnosis to prevent mistakes:

  • Do a visual inspection for common problems like checking to see if electrical connectors are connected.

  • Check engine oil for the proper viscosity and that it is not sludged up.

  • Verify that failure codes are present before attempting repairs.

  • Always follow the manufacturer's procedures to prevent replacing good components or misdiagnosing the trouble code.

How serious is the P0020 code?

  • The engine may hesitate on acceleration.
  • The engine fuel consumption may get worse.
  • The engine may get carbon buildup on the valves and piston rings if repairs are not done as soon as possible.

What repairs can fix the P0020 code?

  • Clearing the fault codes and testing the system to verify the code
  • Repairing or replacing the wiring to the intake camshaft oil control valve for bank 2
  • Replacing the camshaft oil control valve for bank 2 intake camshaft
  • Replacing the ECM if directed from pinpoint tests

Additional comments for consideration regarding the P0020 code

The code can be caused by the OCV having an internal short circuit or an open circuit. The code may be accompanied with code P0021 or P0022.

Need help with a P0020 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
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....


Related questions

Q: My car died while driving and now the car won't start. There is just a click when turning the key but lights turn on.

The check engine light may hold important clues as to what is going on. During a check engine light diagnostic, a certified mechanic from YourMechanic would use a code scanner to retrieve the specific diagnostic trouble code(s) from your car's...

Q: Code P0340

The P0340 problem code references a camshaft position sensor malfunction. The ability to restart the engine suggests it is failing versus has failed. There was an issue with this engine with the cam chain tensioner - which also affects cam...

Q: My recently purchased used vehicle is now reading "Engine Power Reduced". What does this mean and what is the repair and costs? 2010 GMC Terrain

Hi - the "Reduced Engine Power" message is an "aggregate message", sort of like "Check Engine", which can be caused by both engine or transmission problems. Engine performance is cut back, in theory to avoid further damage. First task is...