P023B Chrysler Code - Charge Air Cooler Coolant Pump Control Circuit Low
Quick Answer
The Charge Air Cooler (CAC) system is used to reduce the temperature of the air entering the combustion chambers to improve engine performance. Common causes include Faulty Charge Air Cooler Coolant Pump, Charge Air Cooler Coolant Pump harness is open or shorted, Charge Air Cooler Coolant Pump circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P023B Chrysler indicates Charge Air Cooler Coolant Pump Control Circuit Low.
- Common causes
- Common causes include Faulty Charge Air Cooler Coolant Pump, Charge Air Cooler Coolant Pump harness is open or shorted, Charge Air Cooler Coolant Pump circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P023B Chrysler Description
The CAC Pump is a smart device that contains a LIN Bus communication module and a coolant pump. To maintain a desired charge air temperature, the Powertrain Control Module (PCM) sends a pump speed command over the LIN bus to the internal CAC pump module. The internal CAC Pump module controls the pump speed/coolant flow rate using Pulse-width modulation (PWM). The CAC Pump assembly monitors for internal system circuits and performance failures. If a fault occurs the CAC Pump module sends the fault information to the PCM through the dedicated LIN Bus. The PCM processes the information received and then sets the correlating fault.
The Diagnostic Trouble Code (DTC) will be set if the PCM receives a LIN bus message from the Charge Air Cooler Coolant Pump that the pump control circuit voltage is less than 8.5-Volts.
What are the Possible Causes of the DTC P023B Chrysler?
- Faulty Charge Air Cooler Coolant Pump
- Charge Air Cooler Coolant Pump harness is open or shorted
- Charge Air Cooler Coolant Pump circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P023B Chrysler?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P023B Chrysler code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P023B Chrysler Code
1. What does the OBDII code P023B mean on a Chrysler vehicle?
P023B indicates a low voltage condition in the charge air cooler coolant pump control circuit, which is responsible for managing the pump that cools the air entering the engine.
2. What are the common symptoms of code P023B in a Chrysler?
Symptoms may include reduced engine performance, increased intake air temperatures, possible overheating, and an illuminated check engine light.
3. What causes the P023B code to appear?
Common causes include a faulty charge air cooler coolant pump, damaged wiring or connectors in the control circuit, a blown fuse, or a malfunctioning control module.
4. Can I drive my Chrysler with the P023B code?
Driving with this code is not recommended, as it may lead to reduced engine efficiency, potential overheating, or further damage to the engine components.
5. How do I diagnose the P023B code?
Start by checking the charge air cooler coolant pump wiring and connectors for damage. Then, test the pump itself and inspect related fuses and relays. Finally, check for proper voltage and ground at the pump.
6. How do I fix the P023B code on a Chrysler?
Repairs may include replacing the charge air cooler coolant pump, repairing damaged wiring or connectors, replacing a blown fuse, or reprogramming or replacing the control module if needed.
7. Is the P023B code specific to Chrysler vehicles?
No, the P023B code can appear on other vehicles, but the diagnostic and repair steps may vary depending on the make and model.
8. What tools do I need to troubleshoot the P023B code?
You’ll need an OBDII scanner, a digital multimeter to check voltage and continuity, and potentially wiring diagrams specific to your Chrysler model.
9. How much does it cost to repair the P023B code?
Costs can vary depending on the issue. Replacing the coolant pump may cost $200–$600, while wiring repairs or module replacement could add to the expense.
10. Can a dirty or clogged charge air cooler cause the P023B code?
While not a direct cause, a clogged charge air cooler can strain the coolant pump, potentially leading to circuit issues and triggering the code over time.
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