02sensor

[Jujuhatton81]

Ok so I really need some help here yall. I have a 2007 jeep liberty and it was throwing a code for the 02sensors. So we replaced all 4 and we done this 2 different times from 2 different stores. Both times the new sensors made it go in lymph mode. I had no power, it didn’t want to shift gears, started throwing multiple misfires, loss signal of right wheel and some more I just can’t remember them all. But when I unplugged them it runs fine. Any ideas???

 

[ikuo78]

Try disconnecting the battery and resetting the PCM and setting the fuel trim value to 0.
If that doesn't work, suspect a dead catalyst, the wrong O2 sensor, or a dead O2 sensor heater relay.
In the 2003, the downstream O2 sensor heater is powered from the relay.
The upstream O2 sensor heater is powered from the PCM via PWM.
I don't know about the 2007.

The O2 sensor DTCs are P0130-P0147,
The O2 sensor heater DTCs are P0030-P0064,

which code was it?

 

[blackhawk]

Did you try with Mopar o2 sensors?
As they told you before, try to erase the adaptative memory with the scanner.

Regarding los of signal of right wheel? You mean abs wheel sensor? If it's so, just unplug that sensor, check+12v in the connector, with a scanner you will be able to see if all of them are working by selecting abs speed sensor, they all must show the same speed.

 

[duderz7]

NTK are the sensors of choice, don't cheap out. And reset computer as mentioned above. Your computer is possibly trying to keep it running with the bad information it has stored from bad sensors. Now with the good sensors or crappy aftermarket ones it is thoroughly confused and doesn't know what to do with itself causing limp mode.

 

[Jujuhatton81]

Try disconnecting the battery and resetting the PCM and setting the fuel trim value to 0.
If that doesn't work, suspect a dead catalyst, the wrong O2 sensor, or a dead O2 sensor heater relay.
In the 2003, the downstream O2 sensor heater is powered from the relay.
The upstream O2 sensor heater is powered from the PCM via PWM.
I don't know about the 2007.

The O2 sensor DTCs are P0130-P0147,
The O2 sensor heater DTCs are P0030-P0064,

which code was it?

We did unplug the battery and put the cables together. The codes are P0032,0038,0052 and 0059

 

[derekj]

We did unplug the battery and put the cables together. The codes are P0032,0038,0052 and 0059

Those are all heater circuit codes for the O2's - I would start looking at the heater supply circuit for the O2's - possibly a short to voltage?

 

[lfhoward]

Those are all heater circuit codes for the O2's - I would start looking at the heater supply circuit for the O2's - possibly a short to voltage?

Yes it is highly unlikely all 4 sensors are going out at the same time. The thing they have in common is power and ground. (Each would have its own data wire that is unique so those wires are probably fine.) If I were to guess, I would bet the ground wires are all corroded at the ground point where they attach to the body or engine block somewhere in the engine compartment.

 

[ikuo78]

The heater relay is located in the power distribution center.
The fuse for the sensor is probably number 16.
Attached is for a 2003 but it's probably the same for a 2007.

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