P0141 Fault Code - Resister Fix Question

Anonymous · August 8, 2011, 14:50

Hi,

I have searched the forum (and Google) for more information but to no (meaningful) end.

I have purchased a 15 Ohm 15 watt resistor - Could anyone be so kind to ellaborate what I need to do with it exactly ?

I understand the sensor is underneath the car ? - do I need to remove the 'nappy' underneath the exhaust first

Thanks in advance !

uktotty · August 8, 2011, 19:59

Resistor fix is for the Manifold O2
Splice it and solder it in.

cut the 2 black wires at the SENSOR end and splice in the resistor, the wires in the o2 sensor are nickel plated or of high nickel content and as such will be almost impossible to properly solder, so create some flyleads on the resistor and splice them in

Wabbitkilla · August 8, 2011, 20:16

Resistor fix is for any of the O2 sensors, find the sensor and identify the black wires in the sleeve.
Cut them and splice in the resistor, they are tough little burgers to solder but it is possible with a good enough soldering iron.
Normal practice is to solder wires to the resistor and then cut the black wires and use crimps to connect.

Find somewhere handy to fasten the resistor to so it's not dangling or swinging around.

uktotty · August 8, 2011, 22:17

Quote from: "Wabbitkilla"Resistor fix is for any of the O2 sensors,

CEL - PO141 02 Sensor Heater Circuit Malfunction (bank 1 sensor 2)

Surely this is a very specific O2 sensor isnt it?

Wabbitkilla · August 8, 2011, 23:10

Quote from: "uktotty"
Quote from: "Wabbitkilla"Resistor fix is for any of the O2 sensors,

CEL - PO141 02 Sensor Heater Circuit Malfunction (bank 1 sensor 2)

Surely this is a very specific O2 sensor isnt it?

You get a heater circuit failure on any of the O2 sensors, you can do the same work-around with the resistor ... they're all the same model sensor. You said is was for the manifold sensors, that's not true, you can do the same "fix" on the post-cat sensor too.

If the OP doesn't want to remove the nappy then the connector for the post-cat sensor is attached to the left hand side of the coolant bottle in the engine bay, you can get to the wires there if you want.

uktotty · August 8, 2011, 23:18

So do ALL the sensors give a PO141 as per the title of this thread or is it just Bank1 Sensor2 as the code would suggest?

Wabbitkilla · August 8, 2011, 23:36

Why are we arguing Russ?
P0141 is the post-cat sensor, NOT a manifold sensor!
No ... the manifold sensors give different codes obviously s:roll: :roll: s:roll: , however the OP quoted P0141 and said he knows it's the third O2 sensor and you started talking about manifold sensors and the resistor fix. s:wink: :wink: s:wink:

uktotty · August 8, 2011, 23:47

OH! I am not arguing Nic, just trying to understand, I thought Bank1 Sensor2 was the one on the right hand side of the manifold as that was what I beleived I had fixed when mine went. If you are saying its the cat one then I stand corrected s:)

s:)

Anonymous · August 12, 2011, 14:38

Quote from: "Wabbitkilla"If the OP doesn't want to remove the nappy then the connector for the post-cat sensor is attached to the left hand side of the coolant bottle in the engine bay, you can get to the wires there if you want.

Excellent - I'm surprised none of the other related threads suggested

All sorted

Thanks !

Anonymous · October 13, 2011, 11:14

Hi,

I have followed this thread and all the other threads I can find anywhere. I have an 2003 MR2 and had the engine management light come on. I bought an OBD2 sensor from ebay for less than £15 inc. carriage (as I'd read here that Toyota will charge me £60 to give me the code); it worked perfectly and gave me the following: "P0141 - Oxygen sensor heater circuit malfunction (Bank 1 Sensor2)", which is pretty clear....

However what do I do now? I can have it replaced with a genuine part by my local garage at £180, but is this necessary?? Can I drive without fixing this sensor, either short or long term? Also, I read elsewhere in this topic (or a similar one) that a resistor needs to be fitted as well. Is this right? I could probably manage to pull a simple sensor and an put another one in....but....

Many thanks.

Wabbitkilla · October 13, 2011, 11:43

If you buy a proper Denso sensor (NathanMR2 can help you here), then you won't get the code.
You don't have to pay garage prices, there are a few threads onsite that show people getting them in the £60 region.
The £15 sensor is crap ... don't bother with it.

Yes you can drive ok with this code, it won't do any harm to the car .... the only worry is that while that code is lighting up the eml then another alarm won't be obvious to you if something else occurs.

You CAN get rid of the P0141 using a resistor, it's a cheap work-around ... or just get a proper Denso sensor and you don't have to bother.

Anonymous · October 13, 2011, 13:35

Many thanks. Sounds like I need a Denso sensor. I do not know how to get hold of NathanMR2: but if you're out there Nathan - let me know! I presume they are not difficult to fit....
By the way Wabbitkilla, the £15 relates to the OBD2 reader, not the sensor - sorry. And it gives me the same information that someone else has given me using a posher OBD2 reader, i.e. the P0141 code
Many thanks.

Anonymous · October 13, 2011, 14:40

I have some genuine Denso post cat sensors, recycled of course. £25 incl pnp please.

If you want to contact another member go to Members, look up the name, then click on PM (personal message.) Simples!

If you want to PM me, look left, see the little picture of my van? The blue bit under it is a link to me! If Im teaching you to suck eggs, sorry. It took me ages to get a handle on how this works, being a technophobe! s:)

s:)

Stephster · October 13, 2011, 15:06

I have always wanted to ask D*ck - which do you love me your van or your 2 ?

Anonymous · October 13, 2011, 17:27

Im in three minds....! s:)

s:)

Wabbitkilla · October 14, 2011, 10:51

Quote from: "MWHITE"Many thanks. Sounds like I need a Denso sensor. I do not know how to get hold of NathanMR2: but if you're out there Nathan - let me know! I presume they are not difficult to fit....
By the way Wabbitkilla, the £15 relates to the OBD2 reader, not the sensor - sorry. And it gives me the same information that someone else has given me using a posher OBD2 reader, i.e. the P0141 code
Many thanks.

Apologies for the misunderstanding, d*ck2ski has a second hand sensor available as said above, and NathanMR2 is another member.
You can send them PM's (Personal Messages) if you want to talk to them about buying a sensor.
If you look above the title of this thread you will see (0 new messages) clicking on it will take you to your personal message centre where you can send messages to the guys.

It's actually caught quite a few people out (me included in the early days), buying the sensors from ebay that are generic ... all O2 sensors measure Ovygen but not all O2 sensors are the same s:wink: :wink: s:wink:

fuzbythemob · October 4, 2016, 13:09

Hi All , very late up on this thread but after all 3 sensors changed,an air filter and air something or other and a rear exhaust change my light went out ...........for a month , now back on and rear error code again . this resistor fix ,can it be done on single or mulitiple sensors ? Can anyone who has done this supply an ebay reference for them ?
Regards Mark

1979scotte · October 4, 2016, 13:17

I would be looking to find the root of the problem the resistor fix is a bit of a bodge.
Did you use genuine brand new denso parts?
Did you do the work yourself or did you trust it to a garage?

fuzbythemob · October 4, 2016, 13:29

Garage job throughout and as far as I am aware all genuine parts used( each cost around 70 -80 quid ) . After the post cat exhaust was fitted it ran with no problem light for a month .My intention is to keep the car until it dies a natural death ,I love it ( and am considering another to garage when funds allow )
Mark

1979scotte · October 4, 2016, 16:09

Get yourself a code reader so you know what the codes actually are.
If the parts fitted arent DENSO they can throw a hissy fit.
Perhaps a member local to you who is more mechanically minded can have a look for you.

Genunine O2 sensors are around £60 quid each and a maf is around 70 i think so not cheap if they all need doing.

Jon_G · October 5, 2016, 07:44

Slightly off topic, but has anyone ever had a O2/lambda sensor fail and it WASN'T just the heater circuit?

Mine (owned from new) still has all three original sensors and all the heaters burnt out many years ago (first one 10 years ago) and have been replaced by resistors. But the readings seem fine, at least from the fuel trims. Have I just been really lucky?

fuzbythemob · October 7, 2016, 21:07

This goddam weird car....bought a reader ..sensor spanner..and resistorz just in case ...now the EML has gone off again. I did however add Redex to my last tank of fuel. Could it just be sshit shit sshit ty petrol from Asda

? Thkughts anyone ?

Jon_G · October 7, 2016, 21:59

Quote from: "fuzbythemob"This goddam weird car....bought a reader ..sensor spanner..and resistorz just in case ...now the EML has gone off again. I did however add Redex to my last tank of fuel. Could it just be **** petrol from Asda ? Thkughts anyone ?

I doubt it was the fuel. But I'm now pretty sure that it can't be a sensor heater problem!

At least you have a code reader for it/when the problem recurs. I didn't realise that fault codes aren't stored on these ECUs, my Honda diesel stores all codes arising until actively deleted.

paulj · October 10, 2016, 15:15

I don't think fuel either. Worth checking everything from the start. When I got my 2 the owner had replaced the sensors at a local garage - except that they only found the manifold pair and not the post cat one! Added to that, the post cat unit was a generic part with barrel connectors on the wires which were corroded and poor and caused the engine light to go on and off before I realised and replaced with a bespoke one (actually from eurocarparts and not a denso) Since then, no codes.

fuzbythemob · October 12, 2016, 13:53

Quick update ,light has been off a fortnight...bought reader not used yet but Im not holding my breath...