P023B Fault Code

P023B OBD-II Trouble Code Short Description

Charge Air Cooler Coolant Pump Control Circuit Low

What does trouble code P023B mean?

The P023B fault code indicates a problem with the charge air cooler coolant pump control circuit, specifically that the signal voltage is too low. The charge air cooler helps to cool the compressed air before it reaches the engine, improving performance and efficiency.

The cause of this error can vary, but it may be due to a faulty coolant pump or a wiring issue in the control circuit. It is recommended to have a professional diagnose and repair the issue to prevent further damage to the engine and ensure optimal performance.

The solution for this error is to first check the wiring and connections in the control circuit for any damage or corrosion. If the wiring is okay, then the coolant pump may need to be replaced. To prevent this error from occurring in the future, it's important to perform regular maintenance on the charge air cooler system, including checking coolant levels and replacing worn components.


What are the symptoms of the P023B code?

The P023B fault code on cars can cause the following symptoms:

  1. Engine warning light or check engine light comes on
  2. Reduced engine performance/power
  3. Engine overheating
  4. Poor fuel economy
  5. Reduced acceleration
  6. Unusual engine sounds
  7. Difficulty starting the engine

If you notice any of these symptoms in your vehicle, it is recommended that you take your car to a certified mechanic as soon as possible to diagnose the problem and carry out necessary repairs.


What causes the P023B code?

The P023B fault code indicates a low signal from the charge air cooler coolant pump control circuit. This can be caused by a faulty pump, a damaged or corroded circuit, or a problem with the control module. Other possible causes include a low battery voltage, a failed sensor, or a faulty wiring connection. A diagnostic scan should be performed to identify the exact cause of the issue.

Possible Solutions

How to fix P023B?

To fix the P023B fault code on cars, you should perform the following steps:

  1. Check the charge air cooler coolant pump wiring and connectors for any damage or loose connections. Repair or replace as necessary.

  2. Check the charge air cooler coolant pump fuse for continuity. Replace if blown.

  3. Check the charge air cooler coolant pump relay for proper operation. Replace if necessary.

  4. If all of the above are functioning properly, then it's possible that the charge air cooler coolant pump itself has failed. Replace as necessary.

  5. Clear the fault codes and test drive the vehicle to ensure the issue has been resolved.