2000 Maxima P0135 O2 sensor heater circuit

[gibbons]

I have a 2000 Maxima with 74,000 miles that is giving a P0135 code. This is the O2 heater circuit malfunction code. The Service Engine Light came on immediatly after starting the car on a cold morning (32F).

Is there some trouble shooting that I can do such as checking the resistance and/or voltage. Should I just replace the sesor?

How do I reset the service engine soon light?

[NISTECH]

replace the O2. you can do a resistance check on the heater circuit in the O2. I dont know the spec's off the top of my head. but it is most likely that O2 has failed. the way to clear the code is after replacing it. start the car and let it idle for 60 sec after it reaches operating temp then accel to approx. 3000 rpms for at least 60 sec. then drop down to 2500 rpms for another 60 sec. then drop to idle for more then 30 sec. shut the car off for more then 10 sec. restart the car and do the same procedure again starting with the 60 sec idle. if the lite hasnt shut off already it will the next time you drive the car.

[gibbons]

Thanks for the information.

I just found a TSB on this problem code. Are there any additional steps I need to take? Note this car has been to the dealer three times this year for various emission trouble codes.

NTB02002 If a 2000 or 2001 Maxima has a MIL "On" and any of the following DTCs stored in the ECM - - P0134 (Bank 1) HO2S1 (Front) (High Voltage) - P0135 (Bank 1) HO2S1 Heater (Front) - P0154 (Bank 2) HO2S1 (Front) (High Voltage) - P0155 (Bank 2) HO2S1 Heater (Front) The cause may be either of the following - 1. Intermittent connection at the ECM connector. 2. Water condensation in the exhaust may be causing intermittent high voltage output from the Front O2 sensor during deceleration. This may result in the Front O2 sensor element cracking. NOTE - Intermittent connection at the ECM connector may also cause additional DTCs from other systems. Use the appropriate Service Procedure steps provided in this bulletin to diagnose and repair this incident, if it should occur. See this bulletin for detail.

[NISTECH]

I have yet to come across that bulletin. I was aware of a bulletin covering the harness problem near the right hand strut tower. That one usually causes more codes to trigger and in some cases drivability issues. I am going to pull up the tsb you mentioned today. I would say at this point any bulletins regarding O2's lately just follow the repair listed. Have you had the PO420/430 code come up and had the reprogram done for that yet?

[gibbons]

I don't have any record of the P0420/430 or the reprogram. I am not the original owner of the car. The previous owner kept good records.

[gibbons]

From the records, the pre catalytic and ignition coils were replaced. The code that indicated the problem was not recorded. P0420 does indicate bad catalytic.

Should I ask them to do the reprogram?

[gibbons]

The service department said that it did the reprogram as part of the catalytic replacement.

[NISTECH]

you can have a complete warrenty repair history pulled up at the dealer. they enter your VIN in a system called DCS/VANS and it will print what and where work was performed under warrenty.

I am suprised they replaced the cat. the bulliten only states to reprogram the ecm for the repair. but just recently they have mentioned if the current program number is present and you have the code to perform cat diagnosis. probably because of the problems they are having with the cats lately on other models.

[NISTECH]

Ok found your tsb. I havent seen that one yet. but from the looks of it there are 2 possible problems that can cause it and 2 seperate repairs. one is to check the ecm connector and add tie wraps to it to secure the connector better. the other sounds more feasable as it discusses the moisture in the exhuast. this one requires replacing the O2 and reprogramming the ecm.

[gibbons]

Thanks for the information. You guys are great!

The O2 sensor was replaced and the problem was solved. I will verify that the ecm was reprogrammed.

[mysterious_rahul]

Hello Fellas,First Of All Wish You All A Mery Christmas.

I have a 2000 Nissan Maxima, with California Emission with Milage around 112k. It has the Service Engine Soon Light on since last couple of months but some 10 days back it has started behaving weird. Whenever the car engine is cold (in the morning or in the evening) it kind of misfires, so badly that I can feel the vibrations.

I went to Autozone and the read the OBDII Error code as : P0135 O2 Sensor Bank 1 Sensor1.

Now,I am an absolute begineer and I am not very sure where can I find the Sensor Bank 1 Sensor1 in the car.

Very basic question: Is it under the hood or under the car floor? I mean do I need to go under the car to fix it or can I do it by opening the hood.

I hope you are getting what I am trying to see. I have seen a few diagrams which tells about the location of all the sensors but I am not sure if its under the car or under the hood. If its under the hood I will try by myself otherwise I will have to see some car mechanic.

My Observation: The RPM of the car in Idle state is just about 1k rpm and when I put it on drive and keep it at halt then it drops to almost 750 rpm. Is it something to do with the Spark Plugs / Ignition Coils?



Pls Pls Help Me out of this.

Thanks in Advance.