Right Rear 02 Sensor - Rattling Sound Inside Pipe
#1
Right Rear 02 Sensor - Rattling Sound Inside Pipe
02 WS6 TA
There is a rattling sound coming from inside the pipe where the 02 sensor screws in. Yes, I am sure it isn't the bracket or a loose bolt, it's inside the pipe. You can bang on the pipe and hear it right in there. It really rattles when the car is idling, very annoying.
Is this typical of the stock 02 sensors in this car? Should I change it out? I'm not getting any SES lights.
There is a rattling sound coming from inside the pipe where the 02 sensor screws in. Yes, I am sure it isn't the bracket or a loose bolt, it's inside the pipe. You can bang on the pipe and hear it right in there. It really rattles when the car is idling, very annoying.
Is this typical of the stock 02 sensors in this car? Should I change it out? I'm not getting any SES lights.
#2
TECH Senior Member
If it's rattling from INSIDE the cat most likely it's coming apart, normally they'll throw a P0420 or P0430 code depending on which side it is. Make sure the sensor is fully screwed in.
#6
Fixed
I know I started this thread along time ago, but since I finally solved the issue today I wanted to close out the thread with the answer.
I bought two Standard Automotive Products, Inc. O2 sensors, Part. No SG274, and changed both rear sensors. The rattle is 100% completely gone. Both of my stock OEM 02 sensors rattled at idle or when you banged on the pipe. Yes, the OEM sensors were in the pipe as tight as they could go. I think the sound comes from the metal swivel where the wires enter the sensor. I tried puting RTV sealant and tape around them, but no matter what they would still rattle.
Anyway, these new sensors had a nice, rubber grommet instead of that metal swivel so there isn't anything that can rattle on them. They also came pre-coated with anti-sieze on the threads. Not too bad for $45 each.
I bought two Standard Automotive Products, Inc. O2 sensors, Part. No SG274, and changed both rear sensors. The rattle is 100% completely gone. Both of my stock OEM 02 sensors rattled at idle or when you banged on the pipe. Yes, the OEM sensors were in the pipe as tight as they could go. I think the sound comes from the metal swivel where the wires enter the sensor. I tried puting RTV sealant and tape around them, but no matter what they would still rattle.
Anyway, these new sensors had a nice, rubber grommet instead of that metal swivel so there isn't anything that can rattle on them. They also came pre-coated with anti-sieze on the threads. Not too bad for $45 each.
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#8
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Old thread, but the answer is still relevant. I discovered this same problem many years ago on one of mine. Manipulating that ring did nothing to change the rattle, it was something inside the sensor that was rattling. They seem to be more prone to this when they have been removed and reinstalled (perhaps over torqued?).
In any event, replacing the sensor is the fix. Or just deleting it and plugging the hole if it's a rear sensor.
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MechMan81 (02-13-2023)