Fix P022E: STEP-BY-STEP diagnostic GUIDE!

The P022E: Charge Air Cooler Bypass Control “B” Circuit Low refers to a problem where the charge air cooler bypass control “B” circuit is experiencing lower than expected voltage levels. This issue can arise due to a variety of causes, including a faulty charge air cooler bypass control, issues with the wiring or connectors, or a malfunction in the Powertrain Control Module (PCM). When this code is triggered, it suggests that the system controlling the air cooler bypass is not receiving adequate voltage, which could impact engine performance.

P022E – Quick Overview

MeaningP022E: Charge Air Cooler Bypass Control “B” Circuit Low
Is it serious?Yes, this code can be serious as it may lead to improper air charge regulation, potentially causing engine performance issues and increased emissions.
Possible causes– Low voltage in the charge air cooler bypass control circuit
– Faulty charge air cooler bypass control
– Wiring or connector issues
– Faulty PCM
How to diagnose?– Measure the voltage in the charge air cooler bypass control circuit.
– Inspect the bypass control for proper operation.
– Check wiring and connectors for defects.
– Replace or repair any faulty components.

P022E Meaning

The P022E: Charge Air Cooler Bypass Control “B” Circuit Low indicates that there is an issue with the voltage level in the circuit controlling the air cooler bypass, specifically that it is lower than expected. This can be caused by problems with the wiring, connectors, the bypass control itself, or the vehicle’s computer system. When this code appears, it suggests that the air cooler bypass may not be functioning properly, which can affect how efficiently the engine operates.

Step-by-step diagnostic guide

Follow the outlined procedure to diagnose this DTC by eliminating possible causes one by one.

ActionDescriptionTools Needed
Check for Other CodesUse an OBD-II scanner to check if there are any other related codes present. These might give additional clues about the problem.OBD-II Scanner
Inspect the Charge Air Cooler Bypass ControlVisually inspect the charge air cooler bypass control for any signs of damage, corrosion, or disconnection. Ensure it is securely attached.Flashlight, Safety Gloves
Measure Voltage in the CircuitUse a multimeter to measure the voltage in the charge air cooler bypass control circuit. Compare the readings to the manufacturer’s specifications.Multimeter, Manufacturer’s Specifications
Inspect Wiring and ConnectorsCarefully check the wiring and connectors leading to the charge air cooler bypass control for any signs of wear, corrosion, or breaks. Look for loose or disconnected wires.Flashlight, Multimeter
Repair or Replace Damaged Wiring/ConnectorsIf any wiring or connectors are damaged or corroded, repair or replace them. Ensure connections are secure and free from dirt or corrosion.Wire Strippers, Electrical Tape, Replacement Wires/Connectors
Check the PCM (Powertrain Control Module)Inspect the PCM and its connections for any signs of damage or loose connections. If the PCM is suspected to be faulty, it may need reprogramming or replacement.OBD-II Scanner, Multimeter
Clear the Code and Test DriveAfter completing the necessary repairs, clear the P022E code using the OBD-II scanner. Take the vehicle for a test drive to ensure the issue is resolved and the code does not return.OBD-II Scanner, Vehicle Owner’s Manual
Recheck for CodesAfter the test drive, re-scan the vehicle to ensure the P022E code has not reappeared. If the code returns, further diagnosis may be required.OBD-II Scanner
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