Skip the auto shop - Our mechanics make house calls

P0023 OBD-II Trouble Code: Camshaft Position B - Actuator Circuit (Bank 2)

Check Engine Light

P0023 code definition

Camshaft Position B - Actuator Circuit (Bank 2)

What the P0023 code means

P0023 is the OBD-II generic code indicating the Engine Control Module (ECM) has determined that the bank 2 exhaust camshaft Oil Control Valve (OCV) has an open or short circuit. This happens during one drive cycle.

What causes the P0023 code?

  • The OCV is operated by the ECM to less than a 80% duty cycle and output is 100%.
  • The OCV is commanded by the ECM to open up to 70% and output is less than 3%.
  • The OCV or wiring to the bank 2 exhaust camshaft may be shorted out or have an open circuit.

What are the symptoms of the P0023 code?

  • The ECM will turn on the Check Engine Light.
  • The idle may be normal but hesitates on acceleration.
  • The engine may have a hard start condition if the OCV is shorted.
  • The engine will have a reduction in fuel mileage if the OCV is shorted or opened.
  • The engine may run rough or stall depending on timing position during deceleration.

Note: Symptoms may change depending on the timing positions of the camshaft.

How does a mechanic diagnose the P0023 code?

  • Visually inspects the wiring and connections at the OCV and the ECM

  • Scans the computer for trouble codes and documents freeze frame data to see when the failure happened

  • Retests the vehicle to see if the P0023 code comes back

  • Checks the OCV for the correct resistance to see if the valve is shorted or opened internally

  • Checks the wiring from the ECM to the OCV for open or short circuits

  • Performs a manufacturer's specific pinpoint test for the P0023 code and repairs as needed if the code returns

Note: Follow the manufacturer's recommended pinpoint test to narrow down the problem; each engine may be tested differently and possible engine internal damage may occur if tests are not performed in accordance with a correct procedure.

Common mistakes when diagnosing the P0023 code

Follow these simple guidelines to prevent mistakes:

  • Check engine oil to see if it is full, clean and of the correct viscosity.
  • Test system to verify the code coming back before any further tests or repairs are done.
  • Follow the manufacturer pinpoint test procedures step by step.
  • Replace only sensors or components where tests indicate a problem.

How serious is the P0023 code?

  • The engine may run rough and stall.

  • The engine's fuel consumption may get worse and the engine may get carbon fouling of internal valve components.

  • Driving the vehicle for prolonged time with the circuit shorted may damage the ECM.

What repairs can fix the P0023 code?

  • Clearing the code and retesting the system to verify the problem
  • Repairing or replacing the wiring to the exhaust camshaft oil control valve for bank 2
  • Replacing the camshaft oil control valve for bank 2 exhaust camshaft
  • Replacing the ECM

Additional comments for consideration regarding the P0023 code

The code's P0023 problems can happen when the OCV connector has corrosion that will act like an open circuit in the valve. The wiring to the sensor, if broken or shorted, can cause the code.

Need help with a P0023 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

Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP)...


Related questions

Q: I replaced the output shaft sensor. Do I need to reset the code?

Try removing the battery cables and letting the computer sit for about 1 minute and then hook up the cables or if you have a scanner that can erase the codes. This will clear the engine light and codes to...

Q: How much should it cost to repair an airbag controller?

Hello - yes, by all means this should be repaired! Without it, your airbag is just dead weight in the vehicle, and offers no protection in the event of a crash. Was the vehicle in an accident which damaged the...

Q: What Are the Top Transmission Problems That Should Never Be Ignored?

Ignoring problems with cars is like ignoring problems with teeth. Waiting longer usually just results in more pain and expense. Seeing transmission fluid on the ground under your vehicle should get your attention right away. Transmission fluid is usually reddish-brown....