P12EC – Cylinder Deactivation Exhaust Flow Valve Feedback Circuit High Frequency Bank 1

P12EC Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P12EC Possible Causes

Faulty Cylinder Deactivation Exhaust Flow Valve,Cylinder Deactivation Exhaust Flow Valve harness is open or shorted,Cylinder Deactivation Exhaust Flow Valve circuit poor electrical connection

P12EC Description

The cylinder deactivation exhaust flow control system consists of valves installed at the inlet of the muffler. The exhaust flow control system is used to tune the exhaust note. The Powertrain Control Module (PCM) monitors the Cylinder Deactivation Exhaust Flow Valve. The PCM sets the OBDII code when the Cylinder Deactivation Exhaust Flow Valve is not to factory specifications.