I have all of these trouble code coming up and I recently had all 4 Sensors changed. Is there something else causing this to happened ??
P0161 Oxygen O2 Sensor Circuit Low Voltage (Bank 2, Sensor 2)
P0155 Oxygen 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
P0135 Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0141 Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
Can some one help me ... Please ...

 

did they all come up at once like that? check your owners manual for the o2 heater fuse(s) and check it. and the circuit low voltage may be the sensor. check the connectors.

 

I was already having these error code so I went to Auto Zone and explained what the problem was and they suggested that I change all Oxygen 02 Sensor so I did and I am still getting the same codes.

 

Damn that's strange. PCM ? Bad batch of 02's ? Wiring harness ? Idunno, don't see this every day.

Did it take awhile for the codes to post? You would have to be running rich as hell to smoke the 02's.

Did you get Bosch sensors ?

You know what it sounds like - You twisted all the wires on install.

 

What else can it be ?? The funny thing about this is that the check engine light never came on. I just happened to use my code read on and all of these codes came up.

 

Man - fill your info in, what are you driving?

 

If the check engine light never came on are you sure these were active codes? Did you erase them and then have them come back? It is most likely that all these codes were stored from before and there was no problem with your truck at all. Bad batch of O2's? Gimme a break.

We also need way more info if you expect any help... Like what do you drive?

 

Yes I erased all of the code and the same code came back up. is it something to do with an exhaust leak? I drive a 1997 Ford F150, 6 cyl 4.2 liter.

 

That's probably the case - I'm was thinkin the same after he posted that.

 

What tuner are you using ? Edge by chance ?

 

What is a tuner?

 

I doubt it is an exhaust leak. So all these codes came back but did not turn on the engine light? That does not make sense. Does your reader actually say that the codes are active? How long does it take for these codes to come back? If the codes are active then they should not be able to be cleared. If that is the case I would say it is more likley that you have ecm issues.

 

Oh you just have the reader. Just reboot the PCM and see what you get. Did you disconnect the battery when replacing the O2's ? Regardless, you can reboot anyway, - erase the KAM/disconnect battery for 20 minutes.

Make sure your CEL is working and the bulb isn't smoked. KOEO will confirm.

 

I cleared these codes last night before I went to sleep and when I got to work in the morning I check it again and same codes were there again.

 

Does your check engine light come on at all? Turning on your key without starting the engine should cause your engine light to come on. Make sure the bulb works. If it does and your light is not coming on even though the codes come back then it is most likely a ecm issue. I would try re posting this thread in the section for 97 model year trucks as you may find someone who has dealt with this before. If it is a ecm issue of it logging inactive codes I would not worry about it. What you could do though is unplug one of the O2 sensors and see if it will then log an active code and turn on the check engine light.