P0141 O2 Sensor Heater Malfunction resistor fix?

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P0141 O2 Sensor Heater Malfunction resistor fix?

Postby MR2-MIKE » Sun Sep 15, 2013 12:16 pm

Hi guys

forgive me if this has been covered plenty of times in the past just looking for confirmation, I've got the dreaded P0141 on my 2 and I'm looking at the cheaper resistor fix. I understand the resistor needs to be a 15-27ohm rated at 15w and from reading on here I know the 2 black wires on the sensor need splicing to the resistor but one thing I'm confused about is do I re-attach the resistor to the sensor? I'm "ok" with electrics, I know 'how to do' but not 100% on 'what to do'

cheers in advance
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby AndyM » Sun Sep 15, 2013 12:40 pm

Hi Mike,

As far as I'm aware the resister effectively replaces sensor on those wires. You cut the wires and attach the car side ones to the resistor and leave the sensor side ones disconnected.

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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby MR2-MIKE » Sun Sep 15, 2013 12:47 pm

Ah I see, there was a very straight forward diagram on another thread but I didnt understand where the sensor wires went, thanks very much, appreciate it :-)
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Mightyquin » Mon Sep 16, 2013 7:51 pm

I've just done this fix. Bought a 50w 22ohm resistor from eBay (item 130801720165) cut the black wires near the sensor then pulled them up from the connector on the LH side of engine bay. Attach the two ends to the resistor (one wire to each end) and jobs a good-un!

To clarify, the wires are only connected to the resistor.

I read that chances are the sensor is still working fine, just that the heater circuit - which only matters for a couple of mins from startup - has failed.
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Wabbitkilla » Mon Sep 16, 2013 8:00 pm

You have only cut the black wires and attached the resistor to then going back to the ecu?
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby MR2-MIKE » Mon Sep 16, 2013 8:03 pm

I have been umm-ing and ahh-ing all day but went with a new Denso sensor in the end for not a bad price, I will keep the resistor trick on hand just in case, I kept £50 on the hip from the seller due to the eml so technically no money lost :-) cheerd for the help though guys
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Mightyquin » Tue Sep 17, 2013 10:36 am

Wabbitkilla wrote:You have only cut the black wires and attached the resistor to then going back to the ecu?


Sorry? who's that question aimed at?
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Wabbitkilla » Tue Sep 17, 2013 11:33 am

Mightyquin wrote:
Wabbitkilla wrote:You have only cut the black wires and attached the resistor to then going back to the ecu?


Sorry? who's that question aimed at?


It was immediately after your entry, so I was trying to help you.
Cute & fluffy animals were definitely hurt during the production of this post, there're plenty more where they came from.
Red car, Red leather interior, Red hardtop, Red gear gaiter, Red interior light, Red callipers, and red monster hat.
All very understated ;-)

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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby wizzard1983 » Tue Sep 17, 2013 3:54 pm

can anyone tell me what size o2 socket is needed as have new sensor but need to buy the socket. thanks
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Joesson » Tue Sep 17, 2013 4:10 pm

22mm with a cut out for the cable.
I understand some have managed to use a ring spanner, so if you have one you could try that first, disconnect cable and pass connector through ring and if enough off set on the spanner /enough clearance for the length of the spanner that should work. First of all plus gas and then some more plus gas.
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby wizzard1983 » Tue Sep 17, 2013 4:33 pm

lol ok mate,thanks for the info will give it a try!
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Mightyquin » Tue Sep 17, 2013 4:42 pm

Have I done something wrong then? Please explain - I just followed the instructions from other threads - black wires cut from sensor and attached to the resistor?

So far it seems to have worked!
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Wabbitkilla » Tue Sep 17, 2013 4:55 pm

Oh sorry, I must have misread, I thought you said the eml had cone back on. I'll get my coat ;)
Cute & fluffy animals were definitely hurt during the production of this post, there're plenty more where they came from.
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All very understated ;-)

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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby MR2-MIKE » Tue Sep 17, 2013 6:48 pm

Just ripped my hands to pieces trying to remove the sensor without the 22mm socket with no success excuse my french but that ****er just will not budge got 4 days to wait for the socket from amazon...patience is not my virtue :x
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Joesson » Tue Sep 17, 2013 8:49 pm

While waiting for the socket apply plus gas penetrating oil.
Other brands are available but plus gas worked for me on advice from this forum.
I understand that any such fluid must not contain silicone as this can adversely affect the main catalysed.
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Jandaw » Tue Sep 17, 2013 9:13 pm

When it comes to removing sensors I don't find the specific sockets are always the answer. I accept that you will need one to fit the replacement but if the present sensor cannot be reused then Dremel it off so that you can use a standard socket. That's what I did. It certainly eased the frustration.
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby mrzwei » Tue Sep 17, 2013 10:19 pm

Totally agree about the PlusGas but also make sure the engine is hot, it will make a big difference, just watch your hands and arms.
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby AndyM » Tue Sep 17, 2013 10:32 pm

mrzwei wrote:Totally agree about the PlusGas but also make sure the engine is hot, it will make a big difference, just watch your hands and arms.


+1

I was struggling with one on mine when I first got the car but used the above method and once warm it just popped out easily.

Just make sure you PlusGas before you warm it up. I stupidly thought I've give it a quick top up spray (as the smoke made me think it had all burnt off) and it ignited all over the heat shield. :flame:
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby MR2-MIKE » Thu Sep 19, 2013 1:50 pm

Just a quick question, my sensor socket turned up today so I will be replacing the sensor tonight... Do I need a diagnostic machine to turn the engine light out or will disconnecting the battery for 30+ mins be enough? I've ordered an OBD2 reader but it won't be here until next week and I kinda want to get the sensor done sooner rather than later
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Mightyquin » Sat Sep 21, 2013 12:31 am

Doing the sensor fix was enough for me, no need to reset anything.
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Re: P0141 O2 Sensor Heater Malfunction resistor fix?

Postby Cap » Sat Sep 21, 2013 4:01 am

A 10 second Battery Disconnect will reset the MIL Light.. A 10 Minute will do a complete ECU reset with Fuel Trims Erased.. either one will work..

Or you can leave it as it is, and after 3 Drive Cycles, the light will extinguish itself..

Your Choice..

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