OBD II Code PL120?
#1
Registered User
Thread Starter
Join Date: Nov 2005
Location: Las Vegas, NV.
Posts: 51
Likes: 0
Received 0 Likes
on
0 Posts
OBD II Code PL120?
1999 4Runner 3.4 liter, intermitently throws a check engine light with a PL-120 code. The truck runs fine. When the CEL comes on I reset it and it seems to be fine but in a week or so the CEL comes on again. Other than the intermittent CEL the truck runs fine and just passed smog.
Any ideas on what part/ sensor is going bad?
Thanks.
Any ideas on what part/ sensor is going bad?
Thanks.
#2
Contributing Member
Your code is P0120 and there's plenty of info on that one.
Just do a quick search and you'll find copious amounts of reading material.
https://www.yotatech.com/search.php?searchid=4126832
Just do a quick search and you'll find copious amounts of reading material.
https://www.yotatech.com/search.php?searchid=4126832
Last edited by MTL_4runner; 01-07-2008 at 08:05 AM.
#6
Just had the same problem on my 01. While it could be a hort in the TPS circuit, more than likely the TPS needs to be replaced.
You can get them for anything from around $40 online to $80 + locally (my experience). Not sure what the dealership gets for them.
You can get them for anything from around $40 online to $80 + locally (my experience). Not sure what the dealership gets for them.
Trending Topics
#8
Registered User
Thread Starter
Join Date: Nov 2005
Location: Las Vegas, NV.
Posts: 51
Likes: 0
Received 0 Likes
on
0 Posts
Thanks. After doing some research I believe it is the TPS which is a relatively inexpensive part. The vehicle only has ~90k on it but it is 8 years old so I guess I shouldnt be too surprised a potentiometer is wearing out.
#9
Registered User
Thread Starter
Join Date: Nov 2005
Location: Las Vegas, NV.
Posts: 51
Likes: 0
Received 0 Likes
on
0 Posts
There is no damage to any of the wire loom and its all 100% stock so I too am assuming its the TPS that is wearing out.
Thanks
#10
figured it was better to bump a thread than make a new one...
My engine threw this code PO120 (and behaves as it should with a TPS malfunction), so I want to swap it out... but my question is: where is the TPS sensor in the 3rd gen? I searched but didn't see much, so can anyone give me an easy answer? Thanks
My engine threw this code PO120 (and behaves as it should with a TPS malfunction), so I want to swap it out... but my question is: where is the TPS sensor in the 3rd gen? I searched but didn't see much, so can anyone give me an easy answer? Thanks
#11
Contributing Member
figured it was better to bump a thread than make a new one...
My engine threw this code PO120 (and behaves as it should with a TPS malfunction), so I want to swap it out... but my question is: where is the TPS sensor in the 3rd gen? I searched but didn't see much, so can anyone give me an easy answer? Thanks
My engine threw this code PO120 (and behaves as it should with a TPS malfunction), so I want to swap it out... but my question is: where is the TPS sensor in the 3rd gen? I searched but didn't see much, so can anyone give me an easy answer? Thanks
See attached pic.
Last edited by MTL_4runner; 01-22-2008 at 05:26 PM.
#14
Registered User
Thread Starter
Join Date: Nov 2005
Location: Las Vegas, NV.
Posts: 51
Likes: 0
Received 0 Likes
on
0 Posts
Update to the thread...
I replaced the TPS with a new one which was very simple to do. I verified before removal and after re-installation that the TPS settings were the same with my Scangauge II (10 - 75), although there is no adjustment of this sensor for this year vehicle. The CEL has not appeared since and everything seems to be working fine. I would say time will tell as the CEL only came on very intermittently before, but I think this fix has solved the problem.
I replaced the TPS with a new one which was very simple to do. I verified before removal and after re-installation that the TPS settings were the same with my Scangauge II (10 - 75), although there is no adjustment of this sensor for this year vehicle. The CEL has not appeared since and everything seems to be working fine. I would say time will tell as the CEL only came on very intermittently before, but I think this fix has solved the problem.
#15
Update to the thread...
I replaced the TPS with a new one which was very simple to do. I verified before removal and after re-installation that the TPS settings were the same with my Scangauge II (10 - 75), although there is no adjustment of this sensor for this year vehicle. The CEL has not appeared since and everything seems to be working fine. I would say time will tell as the CEL only came on very intermittently before, but I think this fix has solved the problem.
I replaced the TPS with a new one which was very simple to do. I verified before removal and after re-installation that the TPS settings were the same with my Scangauge II (10 - 75), although there is no adjustment of this sensor for this year vehicle. The CEL has not appeared since and everything seems to be working fine. I would say time will tell as the CEL only came on very intermittently before, but I think this fix has solved the problem.
#16
Registered User
Join Date: Oct 2007
Location: Tuscaloosa, AL
Posts: 705
Likes: 0
Received 0 Likes
on
0 Posts
i had this code to show up in my 98 4runner and it comes and goes like once a month...however, i never notice any difference in how the truck/engine actually perform...
Thread
Thread Starter
Forum
Replies
Last Post
charlie_fong
General Vehicle Related Topics (Non Year Related)
0
09-27-2015 10:06 PM
Odin
86-95 Trucks & 4Runners
3
09-26-2015 06:56 PM