02 sensor replacement

by **Akfahad** » Sat Sep 30, 2006 10:06 am

Hey guys,

Got my 02 sensor replaced this week from the dealer. Everything was fine until about a day later, the RPM's at idle will jump, give it some gas and it'll go away (it seems to go away after running it awile too). Today, however, I just cleaned and detailed the engine bay and it threw a CEL. Haven't checked the code yet on it...but was wondering, since replacing the 02 sensor, will that require me to do another dyno? Possibly why the RPM's are jumping?

by **WTF??** » Sat Sep 30, 2006 10:52 am

cleaning your Throttle Body may solve the idle jumping

The CEL could be anything else... hope you didnt get a defective o2 sensor
but make sure you cleaned up GOOD after youve cleaned the engine bay

by **Astro** » Sat Sep 30, 2006 4:54 pm

I was having the same jumping problem at idle. I cleaned the MAF sensor and throttle body, and also had my O2 sensors with air/fuel sensors. Now, I don't have any issues at idle or CEL's.

by **Akfahad** » Sat Sep 30, 2006 7:08 pm

^^^^Replacement of the 02 sensors shouldn't effect anything I did on the dyno, correct...or would I have to re-tune since the swap?

Thanks tho for the replies, I'll have to do that.

by **Nyyankees3511** » Sat Sep 30, 2006 7:58 pm

It could of possibly. If your last O2 sensor was half bad or very old, but the difference shouldnt be to big to cause any concern.

by **Astro** » Sun Oct 01, 2006 10:41 am

I doubt it would affect anything you did on the dyno. Just change them out because it is affecting your performance.

by **Akfahad** » Sun Oct 01, 2006 10:51 am

ok, thanks Astro...but just got back from AutoZone and ran the code: PO120: TPS/Pedal Position Sensor A Circuit Malfunction. I guess that would make sense since the RPM's are unstable at idle, not to mention the car died on the way home about 5 times. It won't die at a roll, but if I stop to make a turn or light, that's when it'll die, but it won't happen every time. Uuurgh, back to the dealer.......

by **Astro** » Sun Oct 01, 2006 11:15 am

I'd also look into cleaning your MAF with electronic parts cleaner and cleaning your throttle body. After I did that, along with the sensors, my idle is very smooth. From my previous post, I (I mean Gregtrd

) changed the O2 sensors that were put in by mistake to air/fuel sensors. I'm guessing having the wrong sensors plays a part in how it idled.

by **Akfahad** » Sun Oct 01, 2006 12:16 pm

^^^So they put in 02 sensor's where your Air/Fuel Sensor's were located?

the dealer might have messed up then, origionally they told me my A/F sensor was bad, but when I picked up the car, it turned out it was the 02 sensor they replaced. Maybe they switched the sensors, they look almost exactly the same.

by **Astro** » Sun Oct 01, 2006 4:45 pm

Funny thing, it wasn't a dealer - it was UPFD! :roll:

Greg is WAY more knowledgable on the 1MZ than any of the guys at UPFD!!!! Thanks, Greg!!!!

by **Akfahad** » Tue Oct 03, 2006 1:20 pm

Just FYI in case anybody else has this problem, it turned out to be my throttle position sensor that was bad and replaced for $150.

02 sensor replacement

02 sensor replacement

Who is online