I am having the same problem , help. 01 C5. I insert the key and nothing lights up or flickers like a dead battery. I replaced the battery after only 7 mts use, same result. The first time I replaced the battery I did not re- install the new battery until the next day. that is where this all started. had the car towed to dealer to check car, while getting the car off the tow truck the car just started fine. However the dealer said nothing was wrong with the car. No after 7 mts the same problem. Also while driving it cuts off and shows low power. worst the check eng light comes on but goes off after sitting for a few minutes. Can anyone help me as to where to go from here. the codes all show an h for history which also means it is ok now. My codes are AO-LDCM 2282H, 2284H, 2286H and u1064Hm, RDCM b2283H, 2285H2265H, and 28TCI C1278H. Please anyone pm me where to start.
to start the car I sometimes have to turn the key off and on a few times, but the dash doesn't all turn on as before just before i give it the full turn to the right.
Here
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Thanks