Service Light

I've bought a 91' rs convertible about 7 weeks ago.

But that car is still in the repair 'cause there's still a problem.
The "SERVICE" light comes up sometimes, than the car has less power. When i restart the car it disappears again.

When i drive in the overdrive mode, the light comes up regularly after about 10-15 minutes.
When i drive in the normal drive mode, the light ussualy only comes up when i drive uphill. And sometimes when i do a kick-down. In the city or on a flat street i can drive for houres without any problems.

So the dealer where i bought it from brought the car to a garage. The connected the car with there laptop or something to find out a code what that light means. It said something like the "go away-closes" (WEGFAHRSPERRE it calls in german, i don't know the english word, maybe you know what i mean.) is broken. But that car hasen't got a "go away-closes" has it?

I'm gonna give him a call to find out the actuall code.
But maybe you guy's have heart about that problem and you could give me a tip.

OK, thank you a lot.

regards from switzerland

Christian

try to get the number of the code instead of the discription, since your meaning seems to get lost in the translation

Here is what you do. Take a paperclip. Bent it into a U. Make sure the key is off, and insert one end into the A port and other into the B port on your diagnostic hookup. These would be the two right most on the top row. A being the one on the right and b the one to its left. Then turn the key on, but not the car. The SES light will flash * ** * ** * ** to signifiy thenumber 12, 3 times. this lets you know its in diagnostic mode. After that it will flash the codes stored in the ECM. It will flash each code 3 times, and once it has displayed all the fault codes, it will once again flash 12 three more times and continue doing this until you turn the key off. Get the numbers and post them and I can tell you what the fault is.

The reason the car runs badly when the light is on, is because the computer is sent into "limp home" mode and this affects many aspects of the vehicle operation. You will also notice more fuel consumption as well as loss of power.

Hope this helps, let us know what you find.....

Will

Thanks for your help. I'll tray that out.
It's interesting that the car runs in a limp home mode. I didn't know about that. We thought that the reason why the light comes on is that the engine gives less power.

Anyway, thank you a lot. I'll tell what happend.

OK, I've done that diagnostic-stuff.
It told me two different trouble codes.

4 ¦ 3
43. Low voltage at electronic spark timing circuit

5 ¦ 3
53. High voltage at battery OR
High voltage at exhaust gas recirculation valve OR
Voltage reference error OR
Problem at vehicle anti-theft system

What I've changed allready is the alternator but it didn't help.

Does anybody know something about thouse faults?

Thank you a lot

regards, christian