Home Auto Repair P0079 Exhaust Valve Control Solenoid Circuit Low (Bank 1)

P0079 Exhaust Valve Control Solenoid Circuit Low (Bank 1)

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OBD-II Trouble Code Technical Description
Exhaust Valve Control Solenoid Circuit Low (Bank 1)
What does that mean?

This code is a generic OBD-II powertrain code, that means it applies to all makes and models of vehicles (1996-newer), although specific repair steps may vary depending on the model.

On vehicles equipped with variable valve timing (VVT), the Engine Control Module / Powertrain Control Module (ECM/PCM) controls the camshaft position by regulating the engine oil through the control solenoid to change the position of the camshaft. The control solenoid is commanded using a Pulse Width Modulated signal (PWM) from the ECM/PCM. The ECM/PCM monitors this signal and if the voltage is below specification, it will set this trouble code and illuminate the Malfunction Indicator Lamp (MIL).