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P0023 Code – What Does It Mean & How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.


The P0023 DTC code refers to an issue with the “Camshaft Position Actuator B – Bank 2 Circuit/Open.” This code shows that there’s an issue with the camshaft mechanism for the second cylinder in the engine.


The P0023 DTC code stands for “Camshaft Position Actuator B – Bank 2 Circuit/Open.” This code is dedicated to a camshaft position actuator in an engine’s second set of cylinders. In order to ensure the proper opening and closing of valves so that engine performance is maximized, the camshaft position actuator must be able to control the timing of a camshaft.

The “Circuit/Open” part of the code suggests that there is an electrical issue or an open circuit in the camshaft position actuator circuit for bank 2. This is because of a defect in the actuator, damage to the power supply, loss of connection, or a defective control module.


The bank 2 exhaust camshaft Oil Control Valve (OCV) problem is what causes the Engine Control Module (ECM) to set off the P0023 DTC code. The OCV is in charge of controlling the oil flow to the camshaft, which in turn controls how the engine fires. The P0023 DTC code frequently has the following root causes.

Faulty Camshaft Position Sensor

The Camshaft Position (CMP) Actuator System relies on the Camshaft Position Sensor to provide information about the position of the camshaft. If the sensor is faulty or damaged, it can cause the ECM to misinterpret the position of the camshaft, leading to incorrect timing. In such cases, replacing the faulty sensor may resolve the issue.

Damaged Electrical Connectors

The OCV is operated by an electrical signal from the ECM. If the electrical connectors that transmit the signal are damaged or corroded, it can cause an open or short circuit, leading to the P0023 DTC code. Inspecting the connectors for any damage and cleaning or replacing them if necessary can resolve the issue.

Engine Timing Issues

The ECM may alter the timing of the camshafts while the engine is running thanks to the CMP Actuator System. A broken timing belt or chain might throw off the engine’s timing, which can result in the OCV acting up and setting off the P0023 DTC code. The problem can be fixed by checking the timing belt or chain and replacing it if necessary.

In conclusion, a number of problems, including defective camshaft position sensors, damaged electrical connectors, and problems with engine timing, might result in the P0023 DTC code. The problem can be solved, and more harm to the engine can be avoided, by locating and correcting the problem’s primary cause.


The exhaust “B” camshaft position actuator circuit in bank 2 is having problems when the P0023 DTC code arrives. When this code arises, drivers may encounter the following symptoms:

Check Engine Light

One of the most common symptoms of the P0023 DTC code is the illumination of the check engine light. This light will appear on the dashboard, indicating that there is an issue with the vehicle’s engine. It is important to address this issue as soon as possible to prevent further damage to the engine.

Poor Vehicle Performance

Another symptom of the P0023 DTC code is poor vehicle performance. Drivers may notice that their vehicle is running roughly or hesitating on acceleration. This can make it difficult to drive the vehicle safely and efficiently.

Reduced Fuel Economy

Another sign of the P0023 DTC code is a decrease in fuel efficiency. This is due to the engine control module’s ability to alter the timing of the camshafts while the engine is running thanks to the camshaft position actuator system. The fuel economy may decrease if this system is not operating correctly.

Overall, drivers may find the P0023 DTC code’s symptoms annoying. To prevent additional harm to the engine and to make sure that the car is operating safely and effectively, this problem has to be fixed as soon as feasible.


When a vehicle’s check engine light turns on, it can be a sign of a malfunction in one or more of the car’s systems. One of the most common codes that drivers encounter is the P0023 code. 

This code indicates that there is an issue with the exhaust camshaft position actuator circuit in bank 2. Diagnosing and repairing this issue requires a thorough understanding of the car’s systems as well as the use of diagnostic tools.

Visual Inspection

The first step in diagnosing a P0023 code is a visual inspection of the vehicle. This inspection should include checking the wiring and connections in the exhaust camshaft position actuator circuit, as well as the oil control valve. If there are any visible signs of damage or corrosion, the affected parts will need to be replaced.

Diagnostic Tool Use

If a visual check does not show any immediately apparent problems, diagnostic tools will be needed to determine the P0023 code’s underlying cause. To understand the code and learn more about the car’s systems, use a diagnostic tool. The precise component causing the problem can then be determined using this information.

An OBD-II scanner is typical diagnostic equipment used in the automobile industry. The car’s OBD-II port, which is normally found under the dashboard, can be used to connect this device. The scanner can read the P0023 code and offer more details on the car’s systems once it is attached.

A multimeter is another possible diagnostic tool. This tool may be used to check the resistance and voltage in the circuit that controls the exhaust camshaft position. A mechanic can ascertain whether the circuit is malfunctioning by comparing these readings to the manufacturer’s requirements.

To determine the underlying cause of the P0023 error code, it may occasionally be required to employ a scope or other specialist diagnostic tools. These devices provide mechanics access to the engine’s interior so they can look for any problems that might be causing the code to appear.

Overall, diagnosing a P0023 code requires a combination of visual inspection and diagnostic tool use. By carefully inspecting the car’s systems and using the right tools, mechanics can quickly identify the root cause of the code and make the necessary repairs.

Common mistakes

There are certain errors that both technicians and vehicle owners may make during the diagnostic of the P0023 DTC code. To ensure that these mistakes are correctly diagnosed and effectively treated, it is necessary to prevent them. The most common errors are as follows:

Failure to make sure that the wire harness and connections of the camshaft position controller are properly inspected: It is necessary to undertake a complete examination of all such components. The problem may be due to a loose connection or damage to the wire.

Neglecting engine oil: insufficient or dirty engine oil may be the cause of the problem in some cases. If the camshaft actuator fails, it may be due to a lack of regular oil changes.

Overlooking other related codes: The P0023 DTC code may be accompanied by additional codes related to camshaft position sensors or actuators. Ignoring these codes can result in incomplete repairs.

How serious is this?

Depending on the particulars, the seriousness of a P0023 DTC code may vary. In some instances, this may result in a small deterioration of performance and can cause major engine damage where the problem is not resolved. In order to avoid further complications and the cost of repairs, action must be taken as soon as possible.

What repairs can fix the code?

repair manuals

When a vehicle’s check engine light illuminates and the diagnostic trouble code (DTC) P0023 appears, it indicates a problem with the exhaust camshaft position actuator circuit in bank 2. Repairing this DTC requires a thorough understanding of the underlying causes and the appropriate repair procedures. Here are some common methods for repairing the P0023 DTC code.

Replacing the camshaft position sensor

An unreliable camshaft position sensor is one potential root cause of the P0023 DTC code. This sensor is in charge of determining the camshaft’s position and communicating that information to the engine control module (ECM). The ECM may display the P0023 DTC code if it receives inaccurate data.

The mechanic must find and remove the camshaft position sensor from the engine before replacing it. The replacement sensor must then be mounted there and connected to the wiring harness. To make sure the issue has been fixed after installation, the mechanic should clear the DTC code and give the car a test drive.

Repairing Electrical Connectors

A fault with the electrical contacts in the camshaft position actuator circuit is another potential source of the P0023 DTC code. Over time, these connections may corrode or suffer damage, leading to a bad electrical connection and the DTC code.

The mechanic must find the electrical connectors and check them for deterioration or damage before they can be repaired. Replace the connections if any damage is discovered. The mechanic should use a wire brush or contact cleaner to clean the connections if there is corrosion. The DTC code should be cleared, and the car should be tested after the repairs.

Addressing Engine Timing Issues

The P0023 DTC code may occasionally be brought on by issues with the timing of the engine. The camshaft position sensor might not be able to recognize the proper position of the camshaft if the timing is incorrect, which could result in the DTC code.

The mechanic must thoroughly examine the engine’s timing components, including the tensioner, guides, and timing belt or chain, in order to fix timing-related difficulties. Components that are worn out or damaged need to be replaced. After making the necessary adjustments, the mechanic ought to test drive the car to make sure the issue has been fixed before resetting the engine’s timing to the manufacturer’s recommendations.

Overall, repairing the P0023 DTC code requires a thorough understanding of the underlying causes and the appropriate repair procedures. By following the steps outlined above, mechanics can effectively diagnose and repair the P0023 DTC code, ensuring that the vehicle is safe and reliable for the driver.

Related codes

In addition, the P0023 DTC code may be linked to additional codes indicating a problem with camshaft position sensors or actuators. The following codes are included in some of the related codes:

  • P0021 – “Camshaft Position Timing Over-Advanced or System Performance – Bank 2.”
  • P0022 – “Camshaft Position Timing Over-Retarded – Bank 2.”
  • P0019 – “Camshaft Position Timing Over-Retarded – Bank 2.”


The DTC code P0023 indicates that there is a problem with the camshaft position actuator for the second bank of cylinders. It may cause signs such as engine failures, reduced performance, and poor fuel efficiency. During the diagnosis, an examination of the wires, connectors, and any related codes is necessary to complete the repair. If the problem is not addressed, it may lead to more serious engine damage.

If you have encountered the P0023 DTC code, it is recommended to consult a qualified mechanic or technician for an accurate diagnosis and repair immediately. You should always address the DTC codes at once to ensure your vehicle’s longevity and reliability.

P0023 Code – What Does It Mean & How To Fix It