My 1996 C-280 Check Engine Light came on the other day. Car is driving fine, don't notice any driveability problems. Took it to Autozone for the codes to be read. The only code given was a 0170, something about fuel trim out of range. What could cause this? The only other time that it has given a code was when the wife ran it out of gas, coincidentally, she confessed to running it very low just the other day, could this be related? Any help would be appreciated. Thanks.