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I'm getting this error again and occasionally a P0222 with it. I'm going to pull the intake elbow, remove the wires and solder them together. I'm going to order the Toyota part and put my gold contacts into it. This will ensure I have as good of a connection as it is going to get. It's ironic. I drove the car for a week after pulling it from storage and then took a 500 mile trip for our anniversary with no issues, then get home and now I'm getting pretty persistent issues.
I installed the Toyota part (didn't put my gold contacts in since I feared I would damage the new Toyota part getting the old contacts out), soldered the connections...and got zero improvement.
Finally, I ordered a rebuild TPS off eBay from AutoECU. After installing that, I have not had an issue since, so hopefully my problem is solved. A couple of notes. I am not sure if the TPS is held on with an elusive T17 torx (try to find one, it isn't easy) or as some have said, a double cut Robertson S2 (that seemed to fit, but mine stripped when I tried to turn and wouldn't go), but I ended up using a cutoff wheel on my dremel and carving a notch for a flat head screwdriver.
Hopefully this helps others chasing these codes (P0121 with an occasional P0222) as it seems to have finally cured mine. Now I can focus on the P0175 with Restricted Performance (thinking O2 sensors, but want to check fuel trims)
Remember that the P0121 is related to the plug/wiring to the throttle body.
I've done just about everything imaginable to the plug side of things with limited success, but this seems to have finally cured it. I guess time will tell.
Are the originals Robertsons as some have speculated? I couldn't tell, even with them in my hand. They hold tight and are eady enough to get in/out as is now, so I will leave them as is. If i had done it when the local stores were open, I probably would have replaced them, but I just wanted it done. 150 miles later and no errors, so I think it is licked finally.
Those are the tools for the fasteners - 5 point tamper proof Torx- sometimes called pentagon stars. I bought mine off ebay for less than $10.
Except the screws aren't tamper-proof (no center pin) and the T17 isn't part of this set, so no luck there. T17 is pretty rare and I saw on a different forum that a Robertson square S2 should fit. I believe it does...but mine were stripped enough to not work.
Last edited by K.Westra; May 26, 2015 at 08:26 PM.
The ones at Lowes was fitted for an Allen wrench and it seemed to be easy to work with all the other stuff in the way. I know because i replaced both of them.
The ones at Lowes was fitted for an Allen wrench and it seemed to be easy to work with all the other stuff in the way. I know because i replaced both of them.
We're your originals hex head? It seems like a good idea to go that route with a replacement, I just reused my modified originals
Except the screws aren't tamper-proof (no center pin) and the T17 isn't part of this set, so no luck there. T17 is pretty rare and I saw on a different forum that a Robertson square S2 should fit. I believe it does...but mine were stripped enough to not work.
It doesn't matter that there isn't a centre pin - they still fit screws. Included in the set I bought is one marked S2 T20 and that's the one I used. Worked perfectly and didn't damage the fastener. I 've just double checked on a spare throttle body I keep.
It doesn't matter that there isn't a centre pin - they still fit screws. Included in the set I bought is one marked S2 T20 and that's the one I used. Worked perfectly and didn't damage the fastener. I 've just double checked on a spare throttle body I keep.
Interesting. My T20 didn't fit, (and is why I was thinking it was an elusive T17, which a search happened to bring me to an X-Type owner with throttle body issues and to a cargo trailer site, they also apparently are used to adjust some GM headlights) that could be because it was partially stripped. I wonder if it was messed with at some point along the way.
As far as I can see the S2 T20 fits perfectly but I don't have a T17 to try- it certainly works without chewing up the fastener - I've had another look before coming back to the computer. Those 5 point stars are also used on Mercedes - I know because I have an ML in the U.K.. I am told by others those fasteners are on other European cars also.
I agree with you, I found a TPS that did not require soldering, but the face of the TPS was clocked differently than the JAGS, therefore requiring you to swap faces.
That does not look easy in my opinion ,so I told others to have their old units rebuilt instead by a reputable automotive computer rebuilding company.
As far as I can see the S2 T20 fits perfectly but I don't have a T17 to try- it certainly works without chewing up the fastener - I've had another look before coming back to the computer. Those 5 point stars are also used on Mercedes - I know because I have an ML in the U.K.. I am told by others those fasteners are on other European cars also.
Must just be my messed up fasteners then. I wonder why it was messed with in the past? I didn't get the impression the previous owner would mess with those sorts of things, but you never know. Plus you never know what some of the service shops could have done.
It's interesting how many posts we've accumulated about those little fasteners. I'm just happy the replacement TPS seems to have finally cured it
I agree with you, I found a TPS that did not require soldering, but the face of the TPS was clocked differently than the JAGS, therefore requiring you to swap faces.
That does not look easy in my opinion ,so I told others to have their old units rebuilt instead by a reputable automotive computer rebuilding company.
Exactly, when I looked into it, I didn't want to risk not getting it quite right, when it isn't a huge investment to go the rebuilt route (and get the warranty to boot).
This information may be out there, but I replaced my electrical leads with the "gold" kit for my throttle body a few years ago and notice that the connector was not in the greatest shape. It started giving my trouble some time back and the shop I took it to used a Toyota connector part #90980 10711 rather than the $1200 wiring harness from Jaguar. Thanks to John of Autobahn of Illinois I googled that part number and it looks the same. Just wanted to share this info
