Alright, lately I've been getting...

P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0158 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)

I said, no problem...I'll just clear it becuz I use to get these codes once in awhile (before my simulator)....well within the next few miles...it keeps popping back up...I'm like so I check under the hood and look at my simulator...the LED is blinking and the wiring seems fine...where should I start? I know something is wrong cuz it comes back within the next few miles....before my simulator, the code only popped up once in awhile and it was just a ghost code...thanks!

 

Are you running a resistor on your heated O2 wires? Doesn't you'r bank 1 sensor 2 still have the O2 in it? Wich 2 O2's are you simulating?

 

you'll need to check if your simulator is still putting out the required 0.6V

take a multimeter, red to the white wire and black to a ground

those two codes mean that the minimum high voltage that the ECU is reading from the 02's are not being reached

 

make sure none of the connections to the simulator have corroded(sp?)

I covered mine in heatshrink, then COVERED it in electrical tape to make sure nothing gets to them. I really hope nothing goes bad on mine... It will be a b***h to replace it.

 

No resistors here...both secondaries/downstream sensors are simulated....the primaries/upstream have been left untouched and are NOT throwing any SES...

 

no problems with the wiring...mine is covered in electrical tape too

 

thanks larry...I'll give it a shot when I get the chance...I remember you telling me your's was defective....but the LED still blinked with less than 0.6V?

 

From what I've learned I think you have the wrong O2's simulated. If not I do.

 

the post cat o2s are supposed to have sims.

 

Are the post cat O2's the ones with 3 wires going to them or the one's with 4 wires going to them?

 

They post cat have 4 wires and are the ones that need to be simulated. The ones that are still in the headers are the 3 wire ones.

 

I wish I could help you with the O2 sensor simulator problem, but I'm not that great tech. But I think you could help with my problem. Service engine soon light is on. At Advance Auto Parts codes P0170 and _P0171 showed up. They told me O2 sensor I bought four of them ( cost $375 ) guest what!!!!!!!!!, the service engine soon light still on and my car is doing freaking stuff like, doesn't want to go over 4500 rpm, every morning starts like an old chevy car and turns off by itself, sometimes while I'm driving seems like I'm going 100 mph and the car is actually going 55-60 mph. This #*#@&^%#@ is driving me crazy. It is not funny driving on the 408 East-West and see every body pass by when I have at least 225 hp under my hood. Please help.

 

yes, the LED was still blinking but the o2 sim could not output sufficient voltage.

what I ended up doing was hooking up the o2 sim out of the car to a 9V battery and then monitoring with a multimeter to see what the white signal wire output voltage was. They sent me a replacement soon afterwards

 

Thank you! I feel better knowing that I used the sims on the correct O2's

Steven, Probly not related to the light but I think you have the wrong O2's simulated. When simulating the O2's with 4 wires you need a resistor for the heated O2 wire or you will always throw codes I think po135 and po145.

 

Why do you keep insisting I have the wrong o2's simulated? Do you not understand what downstream/secondary means? Also why do you keep insisting a resistor? Everybody I know who runs a simulator has no resistor....besides these codes have nothing to do with heater circuit malfunction...maybe if my car threw codes like these, then my heater element would be bad

P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

etc etc....

 

If you don't cut the heater wires then there is no need to wire resistors into the heater circuit and the car will not throw codes.

The following codes mean that the high voltage the ECU is looking for in the secondary o2 sensor circuit (between 0.6V-1.0V) is not being reached.
P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0158 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)

 

Thats funny because the same thing just happend to me on thanksgiving. I started a thread about it. The SES light actually went off on my way home from work today, but I assume I will be seeing it again soon. I'll have to check the voltage when I get a chance.

Thanks,

James

P.S. 00SEMAX19 needs to just stop.

 

Whow Sorry! Not insisting anything! I know your codes have nothing to do with the heated wire did you read where I said PROBLY NOT RELATED TO YOUR CODES. You said you didn't have a resistor so I thought you may have simulated the O2's that on ly have 3 wires going to them. MY BAD!

ALLGO said that the ones needing to be simulated were the ones with 4 wires.

I'm just trying to make sure I did my **** right.

Did you (steven) leave the heated wire hooked up and leave the O2's in the engine bay?

Hope ya get it figured out, but don't get mad because I'm putting in my .02...Isn't this how we learn.

And stop what jimmycap

 

Yes my heater element is still connected...the only thing I have done is the o2 simulator AND THATS IT...no resistors or wrong o2's being simulated...I have been SES free for the 6 months i've had my headers & simulator...until recently when these codes started popping up

 

Your two cents are fine, but stop arguing with the man about a problem he doesn't have, it's counterproductive.


Thanks,
James

 

thanks Steven...

Jimmy? Quote one sentance where I argued?

 

Man, with all these problems, are headers worth all the aggravation? I still want them as well, but reading things like this makes me thank again and again. Is it worth it?

 

of course they are worth it...its just I'm gettin an SES for some dumb reason...for 6 months I've been SES free...and even with one lite right now, my performance isn't affected since it's the rear o2 sensors

 

I have the same problem with the heater element. Popped up after 6 months on the simulator. I guess once the sensor fails over time the heater will fail too -- I may be wrong . The ECU is wondering if the sensor is sending good numbers via the simulator before the element is heated up, then something should be wrong, I guess one can fool the ECU to a certain level only.

Last try is to disconnect the heater wire and connect the other B1 working sensor's heater to the ECU. Don't know if it will work, but then worth the try.

Edit : FYI, I have P0135 on always...

 

But i don't have any heater problems....only o2 sensor high voltage....or is it something else u were tryin to imply but i missed?

 

Never mind, I thought you had an heater code.

BTW, the O2 simulator generates o/p ranging from 0.3v to 0.75v, while a good sensor does from 0.2v upto 0.85v.

 

Extend the downstream O2 sensors and weld em in behind the main cat and you won't have O2 sim issues....

 

alright heres a quick update....

No more codes...I have been SES free for about 1 week now....what I did was borrow my friend's OBDII scan tool and monitered the codes closely...everytime they kept popping up, I just deleted it....I started to notice the codes popped up alot less...like usually they come back around 5 minutes or less....then I started to notice it came back 1hr later, then 1 day later...then I'm SES free as of now....I'm going to guess my o2 simulator is just PMSing me...for those of you who are in the same position as me, give this a try

 

You will eventually get the heater circuit failure code for the sensor that is hooked with the O2 simulator....

Your joy may essentially be short lived.

 

Care to back up this statment?



James

 

No he wont. We already went over this. read above

 

If you don't cut the pink heater circuit wire, why would it throw a code?

Read around on www.o2simulator.com and you'll see that hooking up a o2 sim properly will not throw the heater circuit code