That damn check engine light!!!!

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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eoin27
The Irish 406 addict
Posts: 1131
Joined: Fri Nov 30, 2007 2:18 pm
Location: Dublin, Ireland

That damn check engine light!!!!

Post by eoin27 »

Ok. I have the ELM327 OBD reader and the most common free software known as scantool.net.
In my previous 406 I was able to turn of the Check Engine light with this software. In this one, it stays on even after I clear it with the software.

Any tips from anyone who is familiar with this software?
2000 D9 Coupé 2.0 SE EW10J4 Scarlet Red - 5 litres of oil gone in 500 miles!!! Time for a new coupe me thinks
skylinemv
1.8 16v
Posts: 71
Joined: Mon Dec 31, 2007 8:10 pm

Re: That damn check engine light!!!!

Post by skylinemv »

I have the same software and same hardware. My light was extingushed by resetting it but the fault had also gone away. My fault was a sticky throttle pot which cleared itself.

What is the error you are resetting?

:o
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eoin27
The Irish 406 addict
Posts: 1131
Joined: Fri Nov 30, 2007 2:18 pm
Location: Dublin, Ireland

Re: That damn check engine light!!!!

Post by eoin27 »

its 4 throttle position sensor warnings

If i clear all of them, they just come back each time. I'm about three or four things away from getting my car completely perfect, this is one of them. Gettin a spray on the back door next week, getting a High pressure pump sensor next week also which will hopefully stop the hunting from a cold start. I know that the check engine light is only a small thing but its annoying me now.
2000 D9 Coupé 2.0 SE EW10J4 Scarlet Red - 5 litres of oil gone in 500 miles!!! Time for a new coupe me thinks
Longintooth
2.0 16v
Posts: 194
Joined: Tue Jul 08, 2008 1:33 pm

Re: That damn check engine light!!!!

Post by Longintooth »

Hi
Well the thing with all this high tech sensing is that it's most likely to be the a wiring or the sensor that's faulty and you can not clear the light until you clear the fault especially the throttle sense. It has to go through the complete stage or you get a DTC code. The throttle is a virtual kind of fly by wire and simply sends a signal to the ECU when you want to go faster or slower but it coincides with other signals from MAFF,MAP etc.
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