9-5 engine warning light

[Duke Thrust]

Hello all,

Bit of a tricky one, looking for any suggestions...

The engine management light keeps popping on. It only does it from start up, not on the move. It seems to be more frequent when the engine is hot. If I pull the ECU fuse it resets and off I go. There's no discernable loss of performance or increased fuel consumption.

I've checked the throttle pot and all seems well there.

It's fairly intermittent and has got me fairly stumped.

Any thoughts?

[Aero_saab]

Without wising to state the obvious...
Get the code read? that will narrow it down from the hundreds of possibilities.

[fastcars_hardy]

What engine do u have

[i want an aero]

you could try the crank position censor?

[fastcars_hardy]

If the crank sensor is faulty then the car won't start or would cut out when hot

[Duke Thrust]

It's the 2.3 Aero HOT.

From the sounds of it I need to get a fault code reader and plug it in next time it comes on.

It's most confusing as it feels no different at all with the light on, same power, engine feel etc.

[fastcars_hardy]

That is a strange one. I wll have a look into it when I'm next at work for you but I think you best opition is to get your codes read.

[lord summerisle]

our engine management light has been on permanently since the cat blew on us 2 1/2 years ago.
the fault code says its the lamba sensor, but thats been changed a couple of times - each time it comes back. all they think is that the fault is within the ECU. car runs fine as it is, so we have never bothered to change the ECU.

[Duke Thrust]

lord summerisle said:

our engine management light has been on permanently since the cat blew on us 2 1/2 years ago.
the fault code says its the lamba sensor, but thats been changed a couple of times - each time it comes back. all they think is that the fault is within the ECU. car runs fine as it is, so we have never bothered to change the ECU.

I must get mine read, but never a good time to nip into a garage. I might just buy a reader and keep it in the car for the next time it decides to have a 'moment'

Edited by Duke Thrust on Wednesday 28th October 11:10

[aeropilot]

Duke Thrust said:

It's the 2.3 Aero HOT.

From the sounds of it I need to get a fault code reader and plug it in next time it comes on.

Whilst a generic code reader may give you the info, it also may not, as some perameters can only be read by the Saab Tech2 tool.

[kremlingazette]

Tech 2 is the only option, that is unless you have canusb and the T7suite.

I have an intermittent cel, it goes off and comes back..

I know what mine is for though, you dont.


Best get it checked

[Aero_saab]

9-5 aeros are obd2 complaint for engine diagnostics.