2005 Chrysler 300C Hemi

Shades of "The Twilight Zone": Replacement of the 300C's cabin pollen filter is listed as part of the 12,000-mile service; it turns out our car wasn't equipped with this option. We also asked about a "check engine" light that illuminated once. The shop foreman found a stored code for an oil-pressure-sensor circuit fault over 100 starts ago. But when he checked the oil-pressure circuit operation, he found no abnormal conditions. Ghosts in the machine? No, if the condition that logged the code ain't there when your car's in for service, they just can't diagnose the fault.