Replaced Battery Now The Management Light Is On

[Guest Warehouse]

Hi, joined up today as I found this place whilst searching for my problem. I hope you can help.

 

This morning my 53 plate C3 failed to start, (well it has been very cold and the poor thing was covered with inches of snow). The battery was almost flat, and attemptimg to start the car obviously took all the juice as the clock on the dashboard had reset. Tried to charge the battery but decided that the original one had had it's time, so time for a new one.

 

Replaced the battery this morning, took about 15 minutes. When I started the engine the engine management light was on, and so far has stayed on. I haven't driven it, but can get the revs above 2000 no problem, so it looks like it's not gone into "limp" mode. As there was so much snow on the car it's possible some has fallen onto the engine, (I've read about the water on the injector issue, but the snow wouldn't have had time to melt).

 

Any ideas why the management light is on, or how to reset it?

[Johndouglas]

 

 

Any ideas why the management light is on, or how to reset it?

 

If C3's are as temperamental as C5's you may have upset the ECU. With C5's there is a very precise method of disconnecting the battery. Yours may be the same. This is it:-

 

Turn off the ignition and remove the key.

Wait 5 mins before disconnecting the battery.

Whilst you wait DON'T open or close any doors or operate the flip.

If the car has sat nav make sure the LED is out.

Disconnect the battery.

After reconnecting wait 2 mins before doing anything.

Then turn on the ignition and wait 30 secs before starting.

You may have to adjust the clock, the windows and re-sync the slip by turning on the ignition and holding the lock button for 10 secs.

[Guest Warehouse]

Thanks for the advice. I tried this last night but the management light stayed on.

 

This morning however it is gone! I can only assume the advice worked so thanks :) .