"456 M GTA automatic" warning lights popping up

It might have been just a glitch. I know these cars don't like idling for extended periods. Are you still getting these warning lights?

Barry

 

Happened to my previous car (2000 456M) a few times. On and off. Car was fine.

 

i am experiencing exactly the same thing...

drive the car for a short time, park up and come back start the car and the ASR light is on and gearbox in limp home mode, after an hour or two..car resets itself.

I have recently changed the battery as i had thought this was the issue, a "bad cell"..but it now looks as though this could be something else.

with the ASR light on feels as though the power is dramatically restricted, and sounds engine based rather than transmission, as though a limiter had been set on engine power...

anyone have any ideas....

 

hi ferrari 456...

thanks for the info...only get the ASR light...runs like crap...needs hige revs to get teh vehilce moving it s as though 70% of the power is being held back....but thats what the ASR system does i guess....the limp home mode is a pain..just 2nd and reverse....

it has reset itself occasionally, also had immobiliser isssues, wont allo cranking of the vehicle...think my issue is electrical...and that opens up a whole new investigating world.

Keeps me of the streets....in and out of a car....

I do think its a sensor issue...just no idea which one...your issue does sound temp originating...i would say its not a lamda or O2 sensor, as that is usually accompanied by the slow down warning light indicating fuel mixture in the cats is too rich and tried to save the cats life.....

if i find anything else out or solve the mystery i will post my findings....

 

Hey you guys have these problems solved? I am experiencing the same thing, I checked everything you guys wrote about already, don't know what to do now........

 

Repost your question in the "Technical QA" section if you want someone mechanically knowledgable to respond.

 

My vote would be on a solenoid problem, it sounds very much like an intermittent coil.

Explanation: solenoids are coils used to magnetically power things; such as small valves in a transmission. Modern cars have quite a few coils - in relays, magnetic pickups and solenoids, and 99% of the time they fail this way. They go open circuit when (really) hot. Because of the wide temperature range, the windings can develop a crack and fail, this happens mostly when warm. A lot of cars have problems when hot because of this, many car owners got stranded because of pickup coil failure.

I believe these automatics have a few of these coils/solenoids in them. They'd have to since they're electronically controlled. I do not know how easy or hard those solenoids are to replace, but with many automatics these are in the sump where the hydraulic 'brain' of the gearbox resides; I doubt the 456 will be different. And since I understand the GTA box is essentially a GM box, it should not be too expensive to find parts either. The matter is mostly how to find the right parts and how to get them in the right place.

 

I'm certainly no mech, but thinking having the car in idle for half an hour or longer, standing still as it were, doesn't sound like a normal op for this bascially closed bottomed car. It runs hot in many circumstances and was made to move, not sit still.


like said, I'm no mech or such.

 

Does the MGT have such an electronic throttle system? I was under the presumption of throttle to be mechanical on any 456.

I don’t think it is very logical to look for the fault here however; such because it would not make sense for the transmission warnings coming on with an ASR problem. Vice versa it does make sense, as the ASR is switched on as a result of the transmission warning to minimise power into the tranmission to protect it, and the driver is warned of that. This warning also serves to say it is unwise to drive the car because there is a slip hazard; such because a transmission problem by definition has the potential to cause a sudden event such as a lock of the wheels or loss of power, possibly leading to a crash.

I would have the error diagnosed on the SD2, as it is all speculation at this point. It could perhaps be that the fan for transmission cooling isn't working and it simply overheats?

Sonomarik: a car that is also intended for generic use on public roads should be able to idle for extended periods on a hot day, period. Internal transmission components will be cooled through the transmission oil cooler.