9-3 engine warning light
Discussion
If you've just had work done its not unreasonable to suspect that whatever they've done has caused the light to come on, doesn't necessarily mean you have a fault.
I don't have a 9-3, but on the 9-5 if you pull the engine management fuse out for 20 seconds it resets the light. If it stays off, great, whatever the problem was isn't there any more. If it comes on again, get a code read and find our what the problem is.
I don't have a 9-3, but on the 9-5 if you pull the engine management fuse out for 20 seconds it resets the light. If it stays off, great, whatever the problem was isn't there any more. If it comes on again, get a code read and find our what the problem is.
assuming OG 9-3 then yes, pulling the main ecu fuse resets the ECU and potentially clears the CEL. However, the light will probably still show after reset but may recycle itself out after a set number of restarts. Not all faults will do this though and, of course, if the fault remains, the light will just reappear.
i vaguely recall a flow chart for Saab CEL's which advised that if the car drives normally with a CEL then it's OK to proceed to dealers for code retrival.
in any event, you need to know what's triggered it in order to avoid potentially serious happenings so a Tech2 session probably a good idea.
Paul
i vaguely recall a flow chart for Saab CEL's which advised that if the car drives normally with a CEL then it's OK to proceed to dealers for code retrival.
in any event, you need to know what's triggered it in order to avoid potentially serious happenings so a Tech2 session probably a good idea.
Paul
probably an artifact/stored code from the previous fault then.
for future reference, most will show up as "performance related issue" - check all the vacuum hoses, you'll usually find one that's popped off or gone all hard and crumbly. another favourite on T7 is the throttle body - it has different sensors/senders that speak with the ECU. Over time they get a bit cruddy and start chucking out dodgy readings which the ECU interprets as "implausible" and triggers the CEL
paul
for future reference, most will show up as "performance related issue" - check all the vacuum hoses, you'll usually find one that's popped off or gone all hard and crumbly. another favourite on T7 is the throttle body - it has different sensors/senders that speak with the ECU. Over time they get a bit cruddy and start chucking out dodgy readings which the ECU interprets as "implausible" and triggers the CEL
paul
much obliged for this info.if it's running normally then probably something and nothing (but i am not a mechanic !). My Aero spectacularly and consistently presents me with a CEL but, as i know it's the TB and not life threatening, i just do an ECU reset (the Fuse 17 thing) and wait till it goes out again. It always does. sometimes my warm,friendly yellow glow is absent for a few hours and sometimes a few weeks.
which variant is it? - some can be very sensitive to the 2nd sniffer in the downpipe and i note you have had exhaust work done. also, the previous overheating thing? - was this a "real" overheat or a sensor issue? some aftermarket replacement sensors are better than others !!
paul
which variant is it? - some can be very sensitive to the 2nd sniffer in the downpipe and i note you have had exhaust work done. also, the previous overheating thing? - was this a "real" overheat or a sensor issue? some aftermarket replacement sensors are better than others !!
paul
Edited by paulmakin on Tuesday 24th March 22:32
ah, this is a T8 car and out of my comfort zone i'm afraid but i'm sure someone who knows will be along in a minute.
was the code P0116 ?
just a general thought though (and sticking with the overheat history) - is the gauge reading normal operating temp? the ecu requires engine temp readings to be within the set ranges after a certain driving time has elapsed. any deviation from the mapped values will throw a CEL. that sensor might be playing up despite being a replacement but i'm just fishing really
regards
paul
was the code P0116 ?
just a general thought though (and sticking with the overheat history) - is the gauge reading normal operating temp? the ecu requires engine temp readings to be within the set ranges after a certain driving time has elapsed. any deviation from the mapped values will throw a CEL. that sensor might be playing up despite being a replacement but i'm just fishing really
regards
paul
Gassing Station | Saab | Top of Page | What's New | My Stuff