P0023 “B” Camshaft Position – Actuator Circuit (Bank 2)
OBD-II Trouble Code Technical Description
"B" Camshaft Position Actuator Circuit (Bank 2)
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles, including but not limited to Toyota, VW, Ford, Dodge, Honda, Chevrolet, Hyundai, Audi, Acura, etc.
A P0023 code refers to the VVT (variable valve timing) or VCT (variable camshaft timing) components and the car’s PCM (powertrain control module) or ECM (engine control module). VVT is a technology used in the engine to allow it to get greater power or efficiency at different running points.
That consists of an oil control valve (OCV), also called a solenoid valve and other components. This source says it best:
The camshaft position (CMP) actuator is controlled by the powertrain control module (PCM) through a high control circuit and a low reference circuit. The high control circuit carries a 12 volt pulse width modulated (PWM) signal from the PCM to the CMP actuator solenoid in order to control the amount of engine oil flow to the cam phaser. The low reference circuit is used as a return circuit. The PCM has the ability to monitor the functionality of the high control and the low reference circuit. If the PCM detects an open, a short to ground, or a short to voltage, DTC P0023 sets.
The "B" camshaft refers to the exhaust, right, or rear camshaft (looking at the engine from the drivers seat). Bank 2 refers to the side of the engine that does not contains cylinder #1.
Symptoms
Causes
A code P0023 may mean that one or more of the following has happened:
Possible Solutions
Ideally you’ll want to refer to a factory service manual for make & model specific steps and specifications. You should use a digital volt ohm meter (DVOM) and measure the resistance of the terminals on the camshaft oil control valve (OCV). Refer to the factory spec on the reading, if it’s not good, replace the OCV assembly. Also use the DVOM to verify wiring, connectors, etc. leading from the OCV back to the PCM.
Other camshaft DTC codes: P0011 – P0012 – P0020 – P0021 – P0022
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"Delete Error Code Permanently, Disable DTC Error Code Function for p0023 in the ECU"
In extreme cases, we even have the option to permanently remove the specific DTC p0023 and disable the function of the specific error code in the ECU. All other fault code functions will then continue to work to protect the engine. This is different from clearing an error code with a diagnostic device. We have the option to permanently remove the function of the specific error code, so that it never comes back. Also emergency running that occurs on the specific error code can be solved in most cases.
Of course we prefer to first try to solve the cause of the error code, but sometimes the only solution is to permanently disable the DTC function of p0023.
