It appears during the recent repair of your Ford Ranger's power steering
pump, the OBD II computer system was reset; erasing all the emission
monitors (readiness flags) from the computer. This was probably caused by
the disconnection or removal of your Ford Ranger's battery. Setting the
emission monitors requires driving your truck at least 200 miles; consisting
of everyday normal driving, stop and starts (like at red lights and traffic), ignition on and off several times a day with at least 15 minute causes in between (this allows the EVAP monitor to run), and freeway driving at least on three occasions for at least 15 minutes each at speeds above 30 mph. After these driving conditions are met and your Ford still fails the OBD II
portion of the smog check, we can only recommend a smog check repair center
conduct a diagnosis of the OBD II computer as to clues of why the monitors
are not setting. Assuming no Check Engine light or Malfunction Indicator
Lamp is illuminated we have to suspect your Ford's only problem is simply not enough drive time yet.
posted by SmogTips Support
