Code Definition

P022B — Intercooler bypass control A solenoid Circuit low

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P022B

P022B is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P022B is stored, the module has detected a signal or supply voltage lower than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P022B is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P022B fault code is set when the engine control module (ECM) detects a lower than expected voltage in the circuit of the Intercooler Bypass Control Solenoid 'A'. This condition often indicates an electrical issue such as a short to ground, or a problem with the solenoid itself that results in reduced voltage. A low voltage in this circuit can impair the solenoid's ability to properly control the airflow in the intercooler system, which is crucial for maintaining optimal engine performance, especially in turbocharged engines.

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