What Does P022D Mean?
The charge air cooler bypass control valve B circuit has an open circuit. This is the secondary or bank 2 bypass valve in systems with dual intercooler circuits. The ECM cannot control this valve, leaving charge air routing unmanaged on this bank. The driver may notice reduced power, elevated intake temperatures on one bank, or potential engine knock under heavy boost.
Common Causes
30%
Open circuit in the wiring between the ECM and bypass control valve B
30%
Charge air cooler bypass valve B solenoid coil failed open
20%
Disconnected or damaged valve B connector
12%
Blown fuse or relay for the valve B control circuit
8%
ECM driver circuit failure for bypass valve B
Diagnostic Steps
1
Locate the charge air cooler bypass valve B (often on the opposite bank from valve A) and verify the connector is seated and not heat-damaged.
2
Measure valve B solenoid resistance — expect 8–15 Ω. An open reading (OL) means the coil is burned out and the valve must be replaced.
3
Check for 12V supply at the valve connector with key on. If absent, trace the power feed through the fuse and relay.
4
Verify continuity of the control wire from the ECM connector pin to the valve connector — should read under 2 Ω. A break confirms a wiring fault.
5
Use a scan tool to command valve B on/off while monitoring voltage at the connector to confirm ECM driver operation.
Estimated Repair Cost
$150 - $550
Parts + labor, varies by vehicle and location
The charge air cooler bypass control valve B circuit has an open circuit. This is the secondary or bank 2 bypass valve in systems with dual intercooler circuits. The ECM cannot control this valve, leaving charge air routing unmanaged on this bank. The driver may notice reduced power, elevated intake...
The most common cause of P022D (Charge Air Cooler Bypass Control "B" Circuit Open) is: Open circuit in the wiring between the ECM and bypass control valve B
Typical repair costs for P022D range from $150 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Limit boost demand and avoid heavy acceleration. Uncontrolled charge air routing on one bank can cause uneven cylinder temperatures and increase detonation risk. The ECM will likely limit boost as a protective measure. Repair before towing or high-performance driving.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P022D to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Turbocharger / Supercharger System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
