Hi there,

I don't know if anyone on here has experience this problem before.

Recently the engine management has came on again ? about a year ago this happened i change the lambda sensor and it was fine.

Could this be exact same problem again.

Forgot to say i drive a fiat, cinquecento S (899cc, M reg).

And thanks in advance

bye for now

Maybe yes, maybe no.

Does it happen when the car is cold?

Cheers

D

It doesn't seem to come on when the engine is cold, it seems to come on when the engine is hot. but the thing sometimes it goes off half way through driving >.<

That actually makes sense. The ECU is constantly monitoring the information from the sensors so if it sees something it expects it will switch the light off.

Therefore you have an intermittant fault, which could be connector related. or the start of a sensor failing.

At least check the connections, after that, its code read time.

Cheers

D

hi really thanks for the help, but how do i code read ????

dealer job really

Try running the car on BP ultimate for a while. Might help clean the engine and sensor.

ycming said:

hi really thanks for the help, but how do i code read ????

Click to expand...

As custard says, a dealer, or you could try your local auto electrician.

Cheers

D

good call cc1 , i'll get some redex, and i'll run a tank of BP ultimate before i put my car in for a retest.

I failed mainly on my emission. dunno if this data will help.

failed on:

fast idle test : HC ppm VOL: Max limit:200 , Actual Value: 308
Lambda : Max limit:1.030, Actual value: 1.105

Second fast idle test: HC PPM VOL: Max limit:200 , Actual Value: 308
Lambda : Max limit: 1.030 , Actual Value: 1.061

May be this help as well, about a month ago my head gasket was gone, i got that udea since i was getting all the white crap in the engine oil bit. since then i brough K-seal , and that have completely fixed the problem and i no longer losing any water + my heating is working amazingly.

So now i brought another lambda sensor, after i put it on, do i need to do anything to reset the ECU ? Can i do this by unplugging the battery ??

any help again will be appreciated . thanks everyone!!!

ok update ,

Redex and BP ultimate is in , and now waiting for my new lambda sensor to be fitted.

after i fit that, is there anythig i should reset ??

thanks again

ycming said:

ok update ,

Redex and BP ultimate is in , and now waiting for my new lambda sensor to be fitted.

after i fit that, is there anythig i should reset ??

thanks again

Click to expand...

NO! Happy motoring!