Heater Malfunction Issues - 8th Generation Honda Civic Forum

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Old 05-12-2018, 07:20 PM   #1 (permalink)
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Join Date: May 2018
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Btess has their car in neutral right now
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Been having an issue for a couple of weeks now, with a constant P0135 code (O2 Sensor Heater Malfunction Bank 1, Sensor 1). At first I tried clearing the code on a Snap On Verus. It would go out for a few miles and then then CEL would return with the same code.

Yesterday, I replaced the sensor with a new Denso replacement, cleared the light, and it came back instantly.. Tried another new Denso sensor with the same end result.

I've checked all of the fuses, and disconnected the battery over night to reset ECM/PCM. On start up today CEL was back. I've looked over connector, doesn't appear that there is any damage.

Any help would be greatly appricated, I've done a bunch of reading on the forums, tried a few things others suggested with no luck. Thanks!

Last edited by Btess; 05-12-2018 at 07:23 PM.
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Old 06-18-2018, 02:44 AM   #2 (permalink)
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336 just put it into 1st gear on 8thcivic
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I was sent the wrong sensor once, and then sent a defective sensor another time. Are you sure you're replacing the correct sensor with the same part number?

It could be something in the wiring or connection terminal, I hope you figure it out.

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