free hit
counters
O2 sensor replacement - Engine & Ancilliaries/Gearbox - The Lotus Forums Jump to content


Recommended Posts

Ive got a bank 2 sensor 1 error which appears to be the precat on the firewall side. Ive had a look round but not found anything specific about replacing this sensor. Anyone done this got any advice? I cant see it from above and the bulkhead panel sooms to be to the side of it so dont know if this will help. 

Cheers Gav

Link to post
Share on other sites

Upgrade today to remove Google ads and support TLF.
  • Replies 13
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Popular Posts

For future reference, yes its quite easy and straight forward. You have to remove the heat shield from between the engine and bulkhead, this is straight forward but one nut is captive the other is loo

Toyota part iirc.

The B2 pre-cat sensor can be easily changed from the top, as long as you have an O2 sensor socket handy. It helps to stand/crouch in the boot and sort of lay across the motor. 

Obvious question but have you erased the code (multiple times, even)? These sensors are notorious for having the occasional hiccup but actually working fine. 

Link to post
Share on other sites

Ive done it a couple of times and each time after the 2nd start it comes back on as per the trigger logic. It is giving a reading as i can see it but suspect its fluctuating beyond its limits. 

Link to post
Share on other sites

Yes, the first thing i did was clean the maf and throttle body and their connectors. The b2 s1 sensor looks like it may be a bugger to change, hence why I'm aaking advice but happy to try all the easy thing first! Cheers

Link to post
Share on other sites

The B2 pre-cat sensor can be easily changed from the top, as long as you have an O2 sensor socket handy. It helps to stand/crouch in the boot and sort of lay across the motor. 

  • Like 1
Link to post
Share on other sites
  • 2 weeks later...

For future reference, yes its quite easy and straight forward. You have to remove the heat shield from between the engine and bulkhead, this is straight forward but one nut is captive the other is loose so you have to be careful not to drop it. I did this with the engine cold so needed my long bar to crack the sensor loose. One sharp tug to break the seal and it then just undid by hand. New one in and all fitted back. The fault light has cleared, the OBD reader is now clear apart from the catalyst cycle needs time to reset but need a longer drive, the 02 sensor cycle has reset.

For reference, I googled the lotus part number which gave a generic Bosch part number and I bought one of those for less than half the price of lotus and I spent £12 on a set of o2 sensor sockets, so all in about £70, a lot less than just the sensor from lotus.

  • Like 2
Link to post
Share on other sites

Hi Gavin

I have just recently been getting engine warning light with OBD code P0160 - Bank 2 sensor 2. It has happened after the last two times I have washed the Evora and after it has had time to dry out I have cleared the code and it didn't come back on, so I am guessing it is water in the wiring.

Pedal Loud has a Youtube video showing similar 

For some tips on an alternative method of removing a stubborn sensor see this video

 

The DeRoure link for the sensor is here https://www.deroure.com/partinfo.asp?MAK=1&MDL=20&TBL=12628&SMA=1&SMO=20&ST=sensor&SC=0&PBID=1087696

The Bosch part number is here https://www.onlinecarparts.co.uk/bosch-1149030.html but it can also be found on Ebay for a little as £50 for the genuine Bosch part.

I bought two and might do both at the same time. I Haven't done mine yet as it is only throwing the warning after being washed.

Edited by mg4lotus
I'm guessing sensor 2 must be the post cat sensor
  • Like 1
Link to post
Share on other sites

Yep got mine off ebay!  I didnt fancy doing it with  hot exhaust or a blow torch as the one I did has very little access room (pre cat between engine and fire wall) and was mainly done by touch. After googling I found the logic behind the fault code, voltage outside limits for a set period, after the second time it triggers. Does sound like yours is either water getting in the connector or the cable has rubbed/melted and the water could be shorting it out. I've got the vag-com/vcds software on my pc which also does obd11, its good as for example, I can see the output from the two sensors on a graph so you can compare them easily. The sensor 2's should be straight forward but much easier with a pit or ramp!

Link to post
Share on other sites
39 minutes ago, mg4lotus said:

it can also be found on Ebay for a little as £50 for the genuine Bosch part

Oh yes, lots of "genuine" Bosch parts on eBay - use caution!

Dave

Link to post
Share on other sites

If you are not confident or unsure of what you are doing then it is always best to use your local Lotus specialist. It will protect service history and value of you Lotus.

Link to post
Share on other sites

Yep I realise that cheers, mine 'seems' to be genuine and came overnite from a car spares company so hopefully it is genuine, I could have got a cheaper one but didn't. Its reading alright on the obd graph but will have to see. 

I have no issue buying genuine parts when needed but neither have I an issue getting non lotus genuine toyota parts like fuel pump, ac compressor etc over the years at much reduced mark up. Everyone has to make a living so no complaints but the ac compressor on my old Evora na saved me £1500. I dont doubt fake parts are a massive problem.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




×
×
  • Create New...