Running lean, reoccurring O2 sensor problems, possible vacuum leak?
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Recovery Vehicle
Joined: May 2009
Posts: 1,191
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From: Charlotte, NC
Running lean, reoccurring O2 sensor problems, possible vacuum leak?
I borrowed my post from another thread to start a new one in hopes of getting some more advice. This was my situation as of a few days ago...
UPDATE: Alright so after cleaning up that sensor and driving around a while the engine light came back on. I got the codes read, but this time instead of getting P0150 and P1174 I only got P0174. It was indicating that bank 2 was running lean.
I also noticed today that I have a slight leak coming from the throttle body heater plate. I have all the parts to repair that and it will be under way soon. Could that somehow be causing my problem?
Also how can I safely and cost effectively check for vacuum leaks?
So... I've gone from P0150 and P1174 to just P0174. I can still notice a slight "bump" in the idle.
Thanks as always and I do not mean to ignore the advice of the other thread I'm just wanting some more opinions.
My SES light came on last night. I got the codes P0150 and P1174.
I have replaced that Bank 2 sensor 1 two times already this summer. Something is making it go bad. The last time I replaced it I noticed oil on the wiring harness. I cleaned it up before installing a new sensor. I also tightened the valve covers.
Would a seafoam cleaning help this? I'm about to get dirty and dig into this a little more. If it's because oil is leaking on to it, and if it's not the v/c what else could it be?
I've also noticed that anytime I have an O2 sensor issue, it's always the passenger side sensors. I don't understand that...
The valley pan gasket was recently replaced.
And if the culprit is oil, then are the sensors bad or can I just clean them and reinstall?
EDIT:
Ok I just disconnected the O2 sensor and there was definitely oil all over the connection. I guess I didn't tighten that valve cover well enough because I was able to tighten with relative ease. So I guess I'll clean both wiring connections, clear the codes, then wait and see?
Will that clear 1174 as well?
I have replaced that Bank 2 sensor 1 two times already this summer. Something is making it go bad. The last time I replaced it I noticed oil on the wiring harness. I cleaned it up before installing a new sensor. I also tightened the valve covers.
Would a seafoam cleaning help this? I'm about to get dirty and dig into this a little more. If it's because oil is leaking on to it, and if it's not the v/c what else could it be?
I've also noticed that anytime I have an O2 sensor issue, it's always the passenger side sensors. I don't understand that...
The valley pan gasket was recently replaced.
And if the culprit is oil, then are the sensors bad or can I just clean them and reinstall?
EDIT:
Ok I just disconnected the O2 sensor and there was definitely oil all over the connection. I guess I didn't tighten that valve cover well enough because I was able to tighten with relative ease. So I guess I'll clean both wiring connections, clear the codes, then wait and see?
Will that clear 1174 as well?
UPDATE: Alright so after cleaning up that sensor and driving around a while the engine light came back on. I got the codes read, but this time instead of getting P0150 and P1174 I only got P0174. It was indicating that bank 2 was running lean.
I also noticed today that I have a slight leak coming from the throttle body heater plate. I have all the parts to repair that and it will be under way soon. Could that somehow be causing my problem?
Also how can I safely and cost effectively check for vacuum leaks?
So... I've gone from P0150 and P1174 to just P0174. I can still notice a slight "bump" in the idle.
Thanks as always and I do not mean to ignore the advice of the other thread I'm just wanting some more opinions.
Last edited by DiscoRover007; Aug 9, 2011 at 08:25 PM.
Recovery Vehicle
Joined: Jul 2011
Posts: 1,132
Likes: 32
From: Austin, TX
Did you do the seafoam induction yet? If you did, you might want to replace the vacum cap you removed to do the induction. Only reason I say this is because I was experiencing lean 02 sensor on bank 2 position 2 after changing out my y-pipe.
I ran a combustion test for a whole other reason and used that vacuum for the test. The cap was so wore out when i tried to remove it it just fell apart.
I replaced the cap and amazingly I have not had the 02 sensor problem since. Going on 3 days now. Normally it would error about 10 minutes after driving.
I ran a combustion test for a whole other reason and used that vacuum for the test. The cap was so wore out when i tried to remove it it just fell apart.
I replaced the cap and amazingly I have not had the 02 sensor problem since. Going on 3 days now. Normally it would error about 10 minutes after driving.
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