96 850 code p0140

solo1 · Post by **solo1** » 25 Sep 2009, 17:27

any one got this one yet , p0140 ....O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) is it the o2 thats bad or a bad wire ??? never got this one dont what to change the 02 if its not it any help guys

Post by **misha** » 25 Sep 2009, 17:40

Try to clean it up with carb cleaner.It might work.

If not,you can always buy a new one and always go with oem Bosch.

solo1 · Post by **solo1** » 25 Sep 2009, 17:42

so your tell me it is the 02 ?

Post by **misha** » 25 Sep 2009, 17:52

Code book says this:
Po140 rear heated oxygen sensor (Ho2s)aging...signal too high,intermittent fault.

So...because of intermittent fault,it could be connectors.Check them,and if they are ok,try to clean the sensor.

Post by **Ozark Lee** » 25 Sep 2009, 18:11

On many there was a recall to add a jumper harness on the rear sensor - double the connectors and you double the opportunity for a bad connection.

...Lee

solo1 · Post by **solo1** » 27 Sep 2009, 17:21

nope it was the 02 ,, all is good now thanks