CEL after adding fuel system cleaner?
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CEL after adding fuel system cleaner?
I'm about 1/4 tank down after filling up and adding STP fuel system treatment to my 2002 4.0L Ranger. Last night, we took a short 10 minute trip to the grocery store, went shopping, came back out, and the CEL illuminated after the truck idled for a minute in the parking lot. It remained on on the ride home, and came back on this afternoon when I started her up again.
Thinking the STP and the CEL might be related, I disconnected the positive battery terminal for about an hour and a half, reconnected, and the CEL did not stay illuminated or come back on during a 20 minute test drive, during which the truck performed flawlessly, no hiccups or hesitations noted at all.
Has this happened to anyone else, where a fuel additive set off the CEL? If it happens again, I'm taking her in under warranty just to be on the safe side.
Thinking the STP and the CEL might be related, I disconnected the positive battery terminal for about an hour and a half, reconnected, and the CEL did not stay illuminated or come back on during a 20 minute test drive, during which the truck performed flawlessly, no hiccups or hesitations noted at all.
Has this happened to anyone else, where a fuel additive set off the CEL? If it happens again, I'm taking her in under warranty just to be on the safe side.
