P121A FORD – Cylinder Balance Test Injector Restricted

P121A FORD Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P121A FORD Possible Causes

Faulty Fuel Injector,Fuel Injector harness is open or shorted,Fuel Injector circuit poor electrical connection

P121A FORD Description

The Powertrain Control Module (PCM) monitors the Fuel Injector. The PCM sets the OBDII code when the Fuel Injector is not to factory specifications.