Ford P0139 HO2S Circuit Slow Response Bank 1 Sensor 2

Description

OBD-II Trouble Code Description for P0139 Ford

O2 Sensor Circuit Slow Response

What does this mean?

OBD2 Code P0139 Ford definition:
This involves the rear oxygen sensor on the driver’s side. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

Symptoms

Possible sumptoms of OBD code P0139 Ford
You will likely not notice any drivability problems, although there may be symptoms.

Causes

Possible causes of OBD code P0139 Ford
A code P0139 Ford may mean that one or more of the following has happened: The oxygen sensor is faulty The wiring to the sensor is broken / frayed There is an exhaust leak

Possible Solutions

The simplest thing to do is to reset the code and see if it comes back. If the code comes back, the problem is more than likely the rear driver’s side oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions: Check and fix any exhaust leaks Check for wiring problems (shorted, frayed wires) Check the frequency and amplitude of the oxygen sensor (advanced) Check for a deteriorating / contaminated oxygen sensor, replace if necessary Check for inlet air leaks Check the MAF sensor for proper operation


The OBD2 Code Information Be Applicable For Ford:

2013 Ford Taurus,2013 Ford Mustang,2013 Ford Kuga,2013 Ford Fusion,2012 Ford Focus,2011 Ford Mondeo,2011 Ford Focus,2011 Ford Edge,2010 Ford Mustang,2009 Ford Focus,2008 Ford Fiesta,2008 Ford Escape,2007 Ford Mondeo,2006 Ford Focus,2005 Ford Mustang,2005 Ford Escape,2003 Ford Mustang,2003 Ford Focus,2000 Ford Mustang

 

Note:

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