Well, I would probably still be lurking, but have run into a snag that I can't seem to find a resolution for (please help!).
The CEL on my mother's 02 Highlander (FWD V6) lit up years ago. Bad upstream sensor. She never changed it. I went to a local store and had them check it and came back with a P1135 *and* P1155 code, I think it was, and am going by memory from what the guy told me, as he just said they were both bad (though I did see B1S1 and B2S1 on the scanner, I do remember that though I can't remember the codes). Anyway, I replaced both with OEM Denso's, and unplugged the battery when I did (part 89467-48011 on each). Now, with two new sensors in, the CEL did not reset, and I cannot get it turned off. I went back to the OBDII scanner, and still came up with a P1135 and P1155. The woman at the local auto parts store said this time that I had to use an actual scanner to reset it, that draining the battery would not work. Two questions then:
1. Is she correct, as that doesn't seem right? And I don't seem to see online where that is the case, with it looking like the ECM drain should do the trick.
2. If she is correct, would one of the cheap Bluetooth model scanners work okay, perhaps the ELM327 (I drive older model vehicles and don't need one, nor need to invest in an expensive model--my dad died and my mom bought a newer car b/c this one is getting older and she's afraid of it getting older without him around, so she is selling this one is why I'm trying to fix it; so I need it just the once).
3. THE WEIRD THING is, just in case this matters: The clock and on/off lights on the dash recirc button, a/c button, and rear defroster button seem to be tied into this thing somehow, in case that points to a bad relay or bad a/f fuse under the hood. The clock has been out for years, as long as the bad 02 sensor she rode around on, and in going to see if I could get to the sensors, I unhooked the old bank 2 sensor 1 without disconnecting the battery, just seeing if I could (I didn't mean to pull it all the way out). When I plugged it in again, the clock worked, the on/off indicator lights worked on all three of the above again, etc. But just for a day or so. And the backlit lights work on them all the time anyway. I have seen this issue brought up online, but never with resolution or an explanation.
So, does that add anything to the mix? I'm thinking the drained ECM, leaving the battery unhooked for 20 minutes or so and flipping the ignition on/off a couple of times should have reset the thing. But maybe I'm wrong. If it is more than the 02 sensor, then does this above about the clock seem to point to anything specific, like the a/f fuse (the big one that can't be checked by sight like the little ones), or the a/f relay??? Bad ground maybe? Heck, man, I'll owe you guys big if you can tell me what to do, as I seem to be coming up blank on this particular issue, i.e., with the clock being affected by it.
Thanks a million to anyone that chimes in.
The CEL on my mother's 02 Highlander (FWD V6) lit up years ago. Bad upstream sensor. She never changed it. I went to a local store and had them check it and came back with a P1135 *and* P1155 code, I think it was, and am going by memory from what the guy told me, as he just said they were both bad (though I did see B1S1 and B2S1 on the scanner, I do remember that though I can't remember the codes). Anyway, I replaced both with OEM Denso's, and unplugged the battery when I did (part 89467-48011 on each). Now, with two new sensors in, the CEL did not reset, and I cannot get it turned off. I went back to the OBDII scanner, and still came up with a P1135 and P1155. The woman at the local auto parts store said this time that I had to use an actual scanner to reset it, that draining the battery would not work. Two questions then:
1. Is she correct, as that doesn't seem right? And I don't seem to see online where that is the case, with it looking like the ECM drain should do the trick.
2. If she is correct, would one of the cheap Bluetooth model scanners work okay, perhaps the ELM327 (I drive older model vehicles and don't need one, nor need to invest in an expensive model--my dad died and my mom bought a newer car b/c this one is getting older and she's afraid of it getting older without him around, so she is selling this one is why I'm trying to fix it; so I need it just the once).
3. THE WEIRD THING is, just in case this matters: The clock and on/off lights on the dash recirc button, a/c button, and rear defroster button seem to be tied into this thing somehow, in case that points to a bad relay or bad a/f fuse under the hood. The clock has been out for years, as long as the bad 02 sensor she rode around on, and in going to see if I could get to the sensors, I unhooked the old bank 2 sensor 1 without disconnecting the battery, just seeing if I could (I didn't mean to pull it all the way out). When I plugged it in again, the clock worked, the on/off indicator lights worked on all three of the above again, etc. But just for a day or so. And the backlit lights work on them all the time anyway. I have seen this issue brought up online, but never with resolution or an explanation.
So, does that add anything to the mix? I'm thinking the drained ECM, leaving the battery unhooked for 20 minutes or so and flipping the ignition on/off a couple of times should have reset the thing. But maybe I'm wrong. If it is more than the 02 sensor, then does this above about the clock seem to point to anything specific, like the a/f fuse (the big one that can't be checked by sight like the little ones), or the a/f relay??? Bad ground maybe? Heck, man, I'll owe you guys big if you can tell me what to do, as I seem to be coming up blank on this particular issue, i.e., with the clock being affected by it.
Thanks a million to anyone that chimes in.