Help me with some information on a SES code
The PCM has determined that a malfunction exists in the primary or secondary electrical circuits for ignition coil "C"
So what does this mean? Car still seems to run just fine, does this affect performance? Which coil is #3/"C"? Could any of my mods have caused this? The light went out on the way home from Autozone, can GM still pull the code and fix the problem? The car is still under warranty but I like to have the story before I go see those people at the Chevy place. Thanks.

