Charge Air Cooler Bypass Control Circuit Open
The P022D code indicates an open circuit in the charge air cooler bypass control solenoid or its wiring. This solenoid regulates airflow through the intercooler to optimize intake air temperature. An open circuit means the electrical path is broken, preventing the solenoid from operating. This can lead to reduced engine performance, increased emissions, and potential overheating of intake air.
1. Most Common Causes
- Open or broken wiring in the charge air cooler bypass control 'B' circuit
- Damaged, corroded, or loose pins in the intercooler bypass solenoid connector
- Internally open or burned-out intercooler bypass solenoid/actuator
- Blown fuse in the solenoid power supply circuit
- Faulty ECM/PCM control output (less common)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or sluggish acceleration
- Poor fuel economy
- Possible rough idle or hesitation
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the solenoid connector and wiring for damage, corrosion, or loose connections.
Step 3: Use a multimeter to check for continuity in the solenoid circuit; compare resistance to specifications.
Step 4: Test the solenoid by applying battery voltage and ground; listen for a click.
Step 5: Check the fuse and relay for the solenoid circuit.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause reduced performance and potential engine damage from improper intake air temperatures.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for parts and labor, depending on whether the solenoid or wiring needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.