EML & Exhaust

[conrank]

Well shortly after the TTE has been fitted (about a week) and before i personally have evben got to drive the car, my mum took it out for a spin to keep it ticking over while i'm away. Halfway through the drive she called me to let me know the bloody EML came on. She said the car still pulls correctly and sounds good. I've ordered a OBD2 scanner which should arrive tuesday. Do you think it could be related to the exhaust change?

[shnazzle]

Well shortly after the TTE has been fitted (about a week) and before i personally have evben got to drive the car, my mum took it out for a spin to keep it ticking over while i'm away. Halfway through the drive she called me to let me know the bloody EML came on. She said the car still pulls correctly and sounds good. I've ordered a OBD2 scanner which should arrive tuesday. Do you think it could be related to the exhaust change?

O2 sensor.
They're so darn sensitive and a fair amount of them don't survive any bashing around such as what happens during exhaust changes.

O2 reader is the correct course of action to determine which one it is. Then just buy a new one for that sensor

[conrank]

Well shortly after the TTE has been fitted (about a week) and before i personally have evben got to drive the car, my mum took it out for a spin to keep it ticking over while i'm away. Halfway through the drive she called me to let me know the bloody EML came on. She said the car still pulls correctly and sounds good. I've ordered a OBD2 scanner which should arrive tuesday. Do you think it could be related to the exhaust change?

O2 sensor.
They're so darn sensitive and a fair amount of them don't survive any bashing around such as what happens during exhaust changes.

O2 reader is the correct course of action to determine which one it is. Then just buy a new one for that sensor

beautiful, thanks mate. My reader arrives very soon. so will hopefully be able to firgure it all out this week... All easy to fit or better to have a mechanic fit it?

[conrank]

Well shortly after the TTE has been fitted (about a week) and before i personally have evben got to drive the car, my mum took it out for a spin to keep it ticking over while i'm away. Halfway through the drive she called me to let me know the bloody EML came on. She said the car still pulls correctly and sounds good. I've ordered a OBD2 scanner which should arrive tuesday. Do you think it could be related to the exhaust change?

O2 sensor.
They're so darn sensitive and a fair amount of them don't survive any bashing around such as what happens during exhaust changes.

O2 reader is the correct course of action to determine which one it is. Then just buy a new one for that sensor

PS: is it ok to drive in the meantime??

[paulj]

Easy to fit, there is a how to on here.  You will need  an O2 sensor socket to replace them, like a standard plug type socket but with a cut out for the wires.  The sensors are the same but  the post cat one has a longer wiring loom.  If replacing I would suggest one with connectors attached rather than generic.

You can drive the car with the light on, no problems there.  Only slight issue is that it will mask any other developing fault light but as O2 is the most popular for our cars you should be ok.

[conrank]

Easy to fit, there is a how to on here.  You will need  an O2 sensor socket to replace them, like a standard plug type socket but with a cut out for the wires.  The sensors are the same but  the post cat one has a longer wiring loom.  If replacing I would suggest one with connectors attached rather than generic.

You can drive the car with the light on, no problems there.  Only slight issue is that it will mask any other developing fault light but as O2 is the most popular for our cars you should be ok.

thanks paul

[jonbill]

It probably is an o2 sensor fault and so fine to drive with the eml on. But until you've confirmed it's the o2 sensor you can't be sure it's nothing to worry about.

The voice of doom. [emoji4]

[BahnStormer]

where are you based? if it's not arriving today, then just ask if there's somebody in the area that can scan yours and confirm it's Lambda (O2) sensors?

If so - should be fine to drive, but it'll just run v rich, so don't get it MOT'd until you've had a chance to run that extra residue out of the cat (see my "emissions" thread!).

also expect your fuel economy to be in the mid 20's: I averaged 25-27mpg with faulty lambda sensors and 33-35mpg afterwards...

[conrank]

It probably is an o2 sensor fault and so fine to drive with the eml on. But until you've confirmed it's the o2 sensor you can't be sure it's nothing to worry about.

The voice of doom. [emoji4]

haha.. dont scare me .. my mechanic is arriving tuesday morning to do a free code read. phew

[conrank]

where are you based? if it's not arriving today, then just ask if there's somebody in the area that can scan yours and confirm it's Lambda (O2) sensors?

If so - should be fine to drive, but it'll just run v rich, so don't get it MOT'd until you've had a chance to run that extra residue out of the cat (see my "emissions" thread!).

also expect your fuel economy to be in the mid 20's: I averaged 25-27mpg with faulty lambda sensors and 33-35mpg afterwards...

sure, well, i will have it sorted one way or the other this week. My 2 week euro road trip is in two weeks so it has to be sortewd by then, My mechanic is popping over in the morning to check it out free of charge as he fitted the new exhaust. FIngers crossed.

[BahnStormer]

I think it took me 6 days total from the time I decided to investigate the failed MOT to having a passed MOT, but bear in mind that 4 days of that was the Easter weekend (parts / delivery less likely!) and I also had to pull apart my binacle to find the sabotaged EML light.... and I misread the "bank #, sensor #" in the code, so ended up doing both manifold sensors, re-testing, THEN realising the post-cat sensor also needed doing...

IF that's all it is, then you'll be FINE for 2 weeks. Just get it scanned ASAP and check those code.

Read up my "emissions mini-saga*" for details on any tools / parts, etc you might need.

*hey, it was a big deal for me!

[shnazzle]

Stop scaring the lad!

It's most likely just the heater circuit in which case nothing will change other than cold start fueling.
MOT would be fine

[BahnStormer]

Stop scaring the lad!

Hey - that was me telling him that even with shops closed and no tools to start, it only took 6 days to buy a scanner, diagnose.... then buy two sensors, fit them THEN realised a third.... I think total cost was ~£250 incl tools - check the other thread. I though thtat was pretty good considering I had to buy everything for the diagnosis/fitting as well as doing all three sensors...

[conrank]

Stop scaring the lad!

Hey - that was me telling him that even with shops closed and no tools to start, it only took 6 days to buy a scanner, diagnose.... then buy two sensors, fit them THEN realised a third.... I think total cost was ~£250 incl tools - check the other thread. I though thtat was pretty good considering I had to buy everything for the diagnosis/fitting as well as doing all three sensors...

Thanks mate. Hoping it isn't 250, but if it is then all good. Just want to makesure it's all fit for the marathon journey across Europe

[m1tch]

My money is on a P0136 or p0141 - bank 1 sensor 2 - post cat O2

[shnazzle]

My money is on a P0136 or p0141 - bank 1 sensor 2 - post cat O2

That's the one Im thinking as the cat is the only point of contact for an exhaust change

[BahnStormer]

Stop scaring the lad!

Hey - that was me telling him that even with shops closed and no tools to start, it only took 6 days to buy a scanner, diagnose.... then buy two sensors, fit them THEN realised a third.... I think total cost was ~£250 incl tools - check the other thread. I though thtat was pretty good considering I had to buy everything for the diagnosis/fitting as well as doing all three sensors...

Thanks mate. Hoping it isn't 250, but if it is then all good. Just want to makesure it's all fit for the marathon journey across Europe

Don't panic - that's the total cost for 3x sensors and tools to remove them, etc.

As per the other guys' comments (and Carolyn's advice*) - likely to be the post-cat O2 sensor, which is ironically cheaper - given it's the same sensor with a longer wire and some retaining clips: £52 for the Denso, last time I checked, plus £4 if you need to buy a 22mm spanner and ~£7 for your ELM (OBD2 reader)... so <£65 total and you'll have a very useful scanner for future use.

*

Bank 1  sensor 1 is towards the pulley end of the engine in the manifold.
Bank 2  sensor 1  is the other sensor in the manifold.
Bank 1  sensor 2 is just after the main cat and has a longer wire.

[conrank]

Stop scaring the lad!

Hey - that was me telling him that even with shops closed and no tools to start, it only took 6 days to buy a scanner, diagnose.... then buy two sensors, fit them THEN realised a third.... I think total cost was ~£250 incl tools - check the other thread. I though thtat was pretty good considering I had to buy everything for the diagnosis/fitting as well as doing all three sensors...

Thanks mate. Hoping it isn't 250, but if it is then all good. Just want to makesure it's all fit for the marathon journey across Europe

Don't panic - that's the total cost for 3x sensors and tools to remove them, etc.

As per the other guys' comments (and Carolyn's advice*) - likely to be the post-cat O2 sensor, which is ironically cheaper - given it's the same sensor with a longer wire and some retaining clips: £52 for the Denso, last time I checked, plus £4 if you need to buy a 22mm spanner and ~£7 for your ELM (OBD2 reader)... so <£65 total and you'll have a very useful scanner for future use.

*

Bank 1  sensor 1 is towards the pulley end of the engine in the manifold.
Bank 2  sensor 1  is the other sensor in the manifold.
Bank 1  sensor 2 is just after the main cat and has a longer wire.

damn, i paid 10 for my OBD2 haha.

[m1tch]

Don't worry too much about the O2 sensors, I had/have a failing post cat sensor, its quite easy to get to - although saying that I have no stock airbox and have removed most of the heat shields on that side lol.

You can remove it from the bottom of the car (I have a TTE), I used the O2 socket plus a fair few extension bars and swivel joints to be able to get a short breaker bar out the side of the car - not much space to be able to move around in there due to one of the exhaust tips.

My recommendation if it is the 3rd O2 sensor is to simply remove the 2 screws holding in the rear passenger tail light (you don't need to disconnect the wiring) and go in through the top, use the O2 socket and a long spanner on the end of it

Also worth noting t is that you can use a short O2 sensor in the post cat - you just need to unclip some of the wiring!

[conrank]

Dun Dun Duuuuunn,, Yup o2 sensor. I think he said it was B2S1 ... I'm still away so for ease i'm just gonna have my mechanic deal with it. He's pricing up NGK and Denso.. i told him i prob want Denso.

[jonbill]

Top left then.

[conrank]

So my mechanic came, did the code reading, got the denso delivered to his garage already, is coming back in 2 hrs to fit everything and it's costing me 100 quid including parts and Labour. I'm pretty chuffed with that.

[shnazzle]

Oohhh we were wrong!

Could have sworn it would be b1s2

[m1tch]

Oohhh we were wrong!

Could have sworn it would be b1s2

At least its WAAAAY easier to get to!

[conrank]

Oohhh we were wrong!

Could have sworn it would be b1s2

At least its WAAAAY easier to get to!

yes..he specifically mentioned that. which means labour is minimal