engine management light

[tony77]

Hi all,
New to the forum, I have had my 206 coupe for three years 2001 2ltr se model. since buying it I have replaced the clutch amongst other general bits and bobs overall around £1500.00 I drove through a large puddle about 6 months ago and the engine management light came on. I was told it was a sensor and it would go out eventually, the inevitable happened and the car broke down, turned out to be the fuel pump. fixed and car was ok again. Just a couple of days ago drove through a puddle again and the eml came on again. I am not sure what to do apart from avoiding puddles, however living in cornwall trying to avoid puddles can be tricky. Any advice would be apreciated. Many thanks
Tony

[gazza82]

You need to get the codes read but my money is on one of the Lambda sensors ...

Also check your air filter as the intake can suck up water and soak the filter.

[tony77]

thanks for the reply gazza

[tony77]

will the sensors need to be replaced gazza.
thanks

[gazza82]

Depends what the code is ... don't just swap the lambdas on my hunch ... they cost around £80 each!

One is mounted very low in the exhaust just behind the catalytic converter and could have got wet. Also check the exhaust for holes, cracks, splits ... a hot cat suddenly being cooled in cold water is not a great idea either ... and I don't mean the furry type!

(PS Our cats would have ripped your arms off if you tried that stunt!)

[Capncol]

It may be worth waiting a few days to see if anything dries out.
If not,you need the codes, else it's all a bit of a guess.
The lambda is low down, so is a good guess, but it could just as easily be a wheel sensor (no VSS input)
or crank pos sensor or one of the air intake sensors if you ingested water.
How deep was the puddle and how fast were you going? (not judging you, just trying guess which sensors may have been affected- Get the codes to be sure)

[tony77]

The centre silencer had a small hole welded a few months back it may have opened again as the car sounds a touch throaty, would this cause the eml to light up.
thanks in advance

[Capncol]

It could be if big enough.

[gazza82]

Our CC has a small crack where the pipe exits the centre silencer (thanks to a speed hump which has bent the exhaust upwards). That caused the EML to come on and I spent a cold afternoon gungumming it yesterday (as well as checking the rear brakes as the handbrake won't hold). Cleared the code which was inefficient exhaust (ie lambda picking up air).

So yes, any hole could be the reason for the EML.