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-   -   Questions: O2 sensor & PS Pressure Switch (http://www.wranglerforum.com/f210/questions-o2-sensor-and-ps-pressure-switch-332265.html)

BriggsTJ 10-08-2013 01:22 PM

Questions: O2 sensor & PS Pressure Switch
 
Vehicle is a 2000 TJ with no factory air.

My CEL came on yesterday and I had the codes checked today at Auto Zone (the key trick to get the codes would not work for me) and I got two errors:

P0551 - Power Steering Pressure Switch Defective

P0135 - Oxygen Sensor Defective (Bank 1 Sensor 1)

I have been doing some reading on the site about these two errors and I have a couple of questions;

If I don't have AC in the jeep, do I need to replace the PS Pressure Switch?

If I am going to replace the one O2 sensor, should I also replace the other one?

Also, I know that my muffler is going to need to be replaced soon as the cover is somewhat loose. Would this affect the O2 sensors?

Thanks in advance,

Big Sarge 10-08-2013 01:27 PM

You will be fine replacing just that one sensor. Make sure to use only NTK brand to replace with. You can get them the cheapest through rockauto.com

The PS switch I would replace regardless of it having A/C or not. I have not read much on it, but the powersteering switch (PS) should have little to do with the vehicle having A/C or not.

BriggsTJ 10-08-2013 01:42 PM

Ok, thanks.

Just double checking here, this is what I need?

More Information for NTK 23506

More Information for STANDARD MOTOR PRODUCTS PSS17

Big Sarge 10-08-2013 01:45 PM

4.0 or 2.5?

BriggsTJ 10-08-2013 01:46 PM

Sorry, I should have put that in the original post - 2.5L

Big Sarge 10-08-2013 01:51 PM

Yep your parts look correct! and here is a 5% discount code

6892D28E6E22

BriggsTJ 10-08-2013 01:54 PM

Thanks much for all the help!

Now I just need to figure out how to install them...

Big Sarge 10-08-2013 02:00 PM

nothing to it really, take the old ones out and put the new ones in and connect the plugs.

Start spraying the O2 sensor with PB blaster a couple times a day where it screws in until you get the new one. a 7/8 wrench will normally get them right out.

As far as the PS switch, make sure you hold that line steady so the you don't twist it off while taking that sensor out.

BriggsTJ 10-08-2013 02:17 PM

The diagnostic report also said to check a circuit / fuse for the P0135 error. Where and what would I check?

Again, thanks.

Big Sarge 10-08-2013 02:22 PM

not sure where you read that but here is another site.

OBD-II Trouble Code: P0135 Oxygen O2 Sensor Heater Circuit Malfunction (Bank1, Sensor1)

BriggsTJ 10-08-2013 02:27 PM

1 Attachment(s)
Thanks for the link.

The comment on the circuit / fuse was on the test report.

Big Sarge 10-08-2013 02:31 PM

It is a code not specific to a certain vehicle, but specific to the OBDII. could be possible that some vehicles have a fuse in the system somewhere but our Jeeps do not. By checking the circuit, It is referring to the wiring itself.

BriggsTJ 10-13-2013 05:01 PM

Got them all installed yesterday and the CEL is off. Thanks!

Big Sarge 10-13-2013 05:40 PM

Awesome!!

tonmilv 10-22-2013 01:15 PM

I have a 05 Wrangler Sport, i am getting P0135, I changed all 4 sensors to new NTK, and i still getting the same code P0135. I tried to clear the code but it wont clear. what else i could check? ECU is 2 years old.

thank you

Big Sarge 10-22-2013 01:18 PM

Quote:

Originally Posted by tonmilv (Post 5566338)
I have a 05 Wrangler Sport, i am getting P0135, I changed all 4 sensors to new NTK, and i still getting the same code P0135. I tried to clear the code but it wont clear. what else i could check? ECU is 2 years old.

thank you

How did you try to clear the code? Never heard of codes that "won't clear"

tonmilv 10-22-2013 03:13 PM

Quote:

Originally Posted by Big Sarge (Post 5566410)
How did you try to clear the code? Never heard of codes that "won't clear"

I tried with an OBDII reader. I also unplug the battery and the code cleared but it came back later the same day.

most of the sensors are new TPS, MAP, ECU, 4 O2 sensors and i just got a new catalytic. dont know what else to check.

last week i took my car to STS to get the O2 sensor replace, and they told me that my sensor was fine. they put a new one and the code cleared but then came again. so they put back my NTK sensor.

Big Sarge 10-22-2013 03:17 PM

OK so it does clear, it just comes back. You may need to check the wiring harness. It is possible that you have a break in the wiring somewhere.

tonmilv 10-22-2013 03:31 PM

Quote:

Originally Posted by Big Sarge (Post 5568994)
OK so it does clear, it just comes back. You may need to check the wiring harness. It is possible that you have a break in the wiring somewhere.

Wiring coming from the O2 Sensor? sorry i am new in troubleshooting stuff in the car. could i buy the wiring harness and replace it?

Big Sarge 10-22-2013 04:54 PM

Quote:

Originally Posted by tonmilv (Post 5569274)
Wiring coming from the O2 Sensor? sorry i am new in troubleshooting stuff in the car. could i buy the wiring harness and replace it?

Yes the harness going to the sensor. No need to buy and replace something that may or may not be bad. Talk to some friends or meet some local Jeepers they will be able to help you check the harness I'm sure.

tonmilv 10-23-2013 07:53 AM

Quote:

Originally Posted by Big Sarge (Post 5571378)
Yes the harness going to the sensor. No need to buy and replace something that may or may not be bad. Talk to some friends or meet some local Jeepers they will be able to help you check the harness I'm sure.

thank you, I wil do that.

colorubi 10-23-2013 08:13 AM

The code p0135 is for the O2 heater circuit. The O2 sensor needs to be heated up for a short time as the engine warms. After a short time of warming it, the sensor starts to input a signal to the ECU. The 4 cylinder engine uses the ASD relay to preheat the O2 sensor. Have a look at the Automatic Shutdown Relay and the associated wiring. It should have a fuse on the circuit to check as well. 6 cylinder vehicles also use a separate oxygen sensor relay to heat the 1/2 and 2/2 downstream O2 sensors-not applicable to yours.


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