Engine Management Warning Light

[pork_pie]

Driving back form work this evening and 20 mins in the light came on.

. Pulled over and restarted the car. Still the light flashes

Called the dealer who cant book the car until Friday assured me the car is okay to drive.

I am aware that the light covers areas such as dianostics and antipollution but any ideas what it could be as there was no roughness or loss of power.

[Raeman]

I had a similar problem over xmas in my Honda Accord. EML light came on and would'nt go off. But the car was running poorly at idle and kept cutting out. Turned out to be the 02 sensor on the manifold. £225 to fix.

Could be a number of things mate. Best to get it checked on the diagnostics.

[pork_pie]

Cheers for the reply - yeah it could be a number of things.

Being diesel I don't think the engine has an O2 sensor. I could be wrong however.

The engine is operating perfectly normal and there is no loss of power at all which leaves me rather flummoxed.

Be interesting to see what error code comes out. I sincerely hope it is covered under warranty whatever it is.

Find out on Friday which seems ages away

[pork_pie]

Driving back form work this evening and 20 mins in the light came on.

. Pulled over and restarted the car. Still the light flashes

Called the dealer who cant book the car until Friday assured me the car is okay to drive.

I am aware that the light covers areas such as dianostics and antipollution but any ideas what it could be as there was no roughness or loss of power.

Right anyone explain this.

As you know the engine management warning light appeared yesterday but there was no lack of power or roughness.

I woke up today and knew I was going to have a bad day after spraying shaving cream all over me thinking it was deoderant and wearing odd shoes. Finished work and the car would not unlock using the handset (i thought the Battery int he set had died) so I extracted the hidden key in it and managed to get in.

I realised I had a flat Battery as I left the lights on when I parked up 8 hours previously.

Called the AA who arrived within 20 mins who charged my Battery and hey presto the warning light did not appar and has not done so since.

I am still taking it to the dealer though on Friday to let them have a look.

Thoughts?

[Raeman]

Seems strange but i suppose it can happen. Maybe the flat Battery has somehow disabled the EML light??

I would still take it to get checked though. Better safe than sorry ect....

Good luck.

[pork_pie]

Seems strange but i suppose it can happen. Maybe the flat battery has somehow disabled the EML light??

I would still take it to get checked though. Better safe than sorry ect....

Good luck.

Okay I took the car in for the arranged check up despite the light going off after a flat Battery. As Raeman mentioned earlier on, it is stil best to go and see what error code comes up.

I have been told that the car needs a new engine ECU and it will be covered under warranty. They said that my ECU needed a software upgrade but the one my car cant accomodate upgraded software (???). Therefore the car needs a new ECU which can take new software. What the hell?!

A new ECU is quoted at £600 plus an hours labour. I am sure they fetch more than that but again, thankfully, I aint paying.

I wil have to take the car in next week and I am fortunate that the car is still under warranty.

Recently the car needed a new clutch (from the dealerships diagnosis not mine. IMO the box seemed fine) and the MMT module needed a new ECU at the same time.

THe thing that is really worrying me is that these kind of problems are sprouting up now and it is not as if I have done mega miles or had it for a few decades nor do I rag it senseless. It has done 20k in 2 years and I average more than 60mpg without fail

Yes I know it could be worse - these problems could occur again after the warranty expires.

If its is ECUs now, what then? I know that the MMT gearbox which I have been lucky with will pack up sometime.

The dealer (who cannot be more courteous) even told me that the diesel engines turbos can prematurely fail too.

I am seriously considering changing my car for something else now. I love my car so much that it even pains me to even think of parting with it but recent issues gives me this niggling feeling that I am going to get more of this in the future and I wil have to pay a lot for it.

[kimi]

When you remove the Battery from a petrol yaris it resets the ECU,

so if the lights on it removes it.

i'm guessing that it would be the same on the diesel.

So when the AA guy changed your Battery he would have been resetting your ECU,

and by doing that he would have wiped out your error codes.

When the dealer put your car onto their MUT it would not show any error codes,

because of the Battery change.

How has the car been running since? have you had any problems?

[pork_pie]

When you remove the battery from a petrol yaris it resets the ECU,

so if the lights on it removes it.

i'm guessing that it would be the same on the diesel.

So when the AA guy changed your battery he would have been resetting your ECU,

and by doing that he would have wiped out your error codes.

When the dealer put your car onto their MUT it would not show any error codes,

because of the battery change.

How has the car been running since? have you had any problems?

To recap the AA guy recharged my Battery and the light was not showing which makes me agree with your commment that the ECU has been reset.

However when I took it to the dealer they said the ECU needs some new software and the unit on my car cant take a software download. Only a new one ECU can facilitate this.

The car has been running fine and have had no problems at all even when the light was on.

What is bothering me is that this will be ECU number 2 and I dread to think how much I would have had to fork out had my car been out of warranty.