Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This means that the car's computer found a problem with the part that helps cool down the air going into the engine. It's like a fan not working properly to keep your computer from overheating.
The engine control module (ECM) has detected a low voltage or resistance issue in the circuit controlling the charge air cooler coolant pump.
The P023B code indicates that the ECM has detected a low electrical signal in the control circuit of the charge air cooler coolant pump. This pump is responsible for circulating coolant to help manage the temperature of the air entering the engine, which is crucial for optimal engine performance and efficiency.
• Check Engine Light illuminated
• Reduced engine performance
• Engine overheating
• Faulty charge air cooler coolant pump
• Wiring issues such as shorts or open circuits
• Faulty ECM or control module
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Check for any additional codes and address them first.
• Inspect the wiring and connectors for damage or corrosion.
• Test the charge air cooler coolant pump for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the charge air cooler coolant pump if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect and maintain the cooling system.
• Ensure connectors and wiring are secure and free of corrosion.
• Use quality coolant and maintain proper levels.
Sensor Issue
• Avoid heavy engine loads until the issue is resolved.
• Monitor engine temperature closely.
• Seek professional diagnostic service if unsure.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been more commonly reported in vehicles with turbocharged engines, where charge air cooling is critical.
Moderate – It should be addressed soon to prevent engine performance issues.
Driving with an unresolved P023B code may lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle stationary or at idle
The charge air cooler coolant pump is typically located near the front of the engine bay, close to the radiator or intercooler.
Q: Can I drive with a P023B code?
A: It's not recommended to drive for extended periods as it may cause engine overheating and reduced performance.
Q: How can I reset the P023B code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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