Code 41/52 3VZe
02-18-2016, 08:48 AM
#1
Code 41/52 3VZe
Hello, again. This code just doesnt want to leave. I've replaced the knock sensor in the block, and ran a new wire. Now, I sporadically get code 41/52, which I think is the TPS. Is this correct? How can I fix this? I think it is running rich, is it just adjustment of a screw? Thanks!
02-18-2016, 09:23 AM
#2
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Code 41 is a short/open in the TPS circuit. http://web.archive.org/web/201211190...85diagnosi.pdf Use your multimeter the check the TPS http://web.archive.org/web/201108151...93throttle.pdf , but don't forget that the code is telling you there is a problem in the circuit, not just the sensor. You might need to trace some wires back to the ECM, and wiggle them while on the ohmmeter.
If you have a bad problem with your TPS, it can cause the ECM to drop out of closed-loop, and depending on a lot of factors can result in a rich condition. As a practical matter, it is very hard to end up with a rich condition in closed-loop; that's why you have an O2 sensor and fuel injectors. And no, you can't change the mixture with an adjustment of a screw on a fuel injected engine. You haven't be able to do that since, what, the early 80s?
Code 52 can be very hard to clear up; I'd try to get your code 41 out of the way first.
If you have a bad problem with your TPS, it can cause the ECM to drop out of closed-loop, and depending on a lot of factors can result in a rich condition. As a practical matter, it is very hard to end up with a rich condition in closed-loop; that's why you have an O2 sensor and fuel injectors. And no, you can't change the mixture with an adjustment of a screw on a fuel injected engine. You haven't be able to do that since, what, the early 80s?
Code 52 can be very hard to clear up; I'd try to get your code 41 out of the way first.
02-18-2016, 11:52 AM
#3
Code 41 is a short/open in the TPS circuit. http://web.archive.org/web/201211190...85diagnosi.pdf Use your multimeter the check the TPS http://web.archive.org/web/201108151...93throttle.pdf , but don't forget that the code is telling you there is a problem in the circuit, not just the sensor. You might need to trace some wires back to the ECM, and wiggle them while on the ohmmeter.
If you have a bad problem with your TPS, it can cause the ECM to drop out of closed-loop, and depending on a lot of factors can result in a rich condition. As a practical matter, it is very hard to end up with a rich condition in closed-loop; that's why you have an O2 sensor and fuel injectors. And no, you can't change the mixture with an adjustment of a screw on a fuel injected engine. You haven't be able to do that since, what, the early 80s?
Code 52 can be very hard to clear up; I'd try to get your code 41 out of the way first.
If you have a bad problem with your TPS, it can cause the ECM to drop out of closed-loop, and depending on a lot of factors can result in a rich condition. As a practical matter, it is very hard to end up with a rich condition in closed-loop; that's why you have an O2 sensor and fuel injectors. And no, you can't change the mixture with an adjustment of a screw on a fuel injected engine. You haven't be able to do that since, what, the early 80s?
Code 52 can be very hard to clear up; I'd try to get your code 41 out of the way first.
02-27-2016, 11:30 AM
#4
Ok! I've replaced the TPS, made sure it was seated right, and the darn thing is still throwing. I guess its a dirty/broken connection somewhere. Something I don't understand: it only does it from a full stop, when I'm driving it never comes on.
02-27-2016, 11:46 AM
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Was the TPS bad? Or were you just hoping it was the TPS itself?
What does "seated right" mean? Did you correctly adjust the TPS? http://web.archive.org/web/201108151...93throttle.pdf
What does "seated right" mean? Did you correctly adjust the TPS? http://web.archive.org/web/201108151...93throttle.pdf
02-28-2016, 04:57 PM
#6
Was the TPS bad? Or were you just hoping it was the TPS itself?
What does "seated right" mean? Did you correctly adjust the TPS? http://web.archive.org/web/201108151...93throttle.pdf
What does "seated right" mean? Did you correctly adjust the TPS? http://web.archive.org/web/201108151...93throttle.pdf
I checked all of the wires, but nothing stands out to me..
i've cleared the codes, but I might try again. I had the battery disconnected for 3 days, but that was before the code 41...
Last edited by 128keaton; 02-29-2016 at 01:38 PM.
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