P014A Code: Meaning, Causes, and Symptoms | OBD2 Codes

P014A – Oxygen Sensor Delayed Response Rich to Lean Bank 2 Sensor 2


P014A: DIY Repairing Video Tutorial


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P014A Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),High Fuel Consumption,Excessive Smoke from Exhaust  

P014A Possible Causes

  Faulty Heated Oxygen Bank 2 Sensor 2,Heated Oxygen Bank 2 Sensor 2 harness is open or shorted,Heated Oxygen Bank 2 Sensor 2 circuit poor electrical connection,Inappropriate fuel pressure,Faulty fuel injectors,Exhaust leaks before or near the Heated Oxygen Bank 2 Sensor 2  

P014A Description

  During a Deceleration Fuel Shut-Off (DFSO) event, the Powertrain Control Module (PCM) monitors the rear heated oxygen sensor (HO2S) signal to determine if the signal is stuck in range. The PCM expects the signal to exceed a calibrated rich or lean value within a calibrated amount of time. If the signal voltage remains less than the rich value after a number of occurrences, the PCM intrusively controls the fuel system rich over increasing time periods in an attempt to force the signal to greater than the calibrated rich value. The test fails when, after three consecutive intrusive attempts, the signal cannot be forced greater than the calibrated rich value. Also, if the signal voltage remains greater than the lean value after a calibrated amount of time with the fuel injectors off, a counter is incremented. The test fails when after three consecutive occurrences the signal is not less than the calibrated lean value.