P2144 means the powertrain control module has detected a lower-than-expected voltage signal on the EGR vent control solenoid circuit. The EGR vent control solenoid manages vacuum or venting to the EGR system, and a circuit-low condition usually points to an electrical fault rather than a mechanical EGR valve problem.
The solenoid windings can short internally or the valve can fail, pulling the control circuit voltage low and setting the code.
The control wire between the PCM and the solenoid may be chafed, pinched, or corroded, creating an unintended path to ground.
Corroded, loose, or damaged terminals in the solenoid connector or related harness junction can increase resistance and lower circuit voltage.
A cracked, disconnected, or improperly routed vacuum hose to the EGR vent solenoid can produce symptoms, though it usually triggers a circuit code only when accompanied by an electrical issue.
The engine computer itself is an uncommon cause; it should only be suspected after the solenoid, wiring, and connectors have been ruled out.
Usually not. Most P2144 codes are caused by a failed EGR vent control solenoid, wiring short to ground, or connector problems. Replacing the PCM is rarely the correct fix and should only be considered after the circuit and solenoid have been thoroughly tested.
The vehicle is generally safe to drive, but the EGR system may not operate correctly, which can increase emissions and possibly cause engine ping or rough idle.
Cleaning the EGR valve usually will not fix this code, because P2144 is an electrical circuit fault. The problem is more likely the vent control solenoid, its wiring, or its connector.
P2144 specifically indicates a low-voltage condition in the EGR vent control circuit, while EGR flow codes relate to incorrect exhaust gas recirculation rates caused by clogged passages or a sticking valve.