ENGINE LIGHT FLASHING AFTER PURGE VALVE REPLACEMENT
I have a 2008 Cadillac CTS AWD. My check engine light has been on for a while, and I was told it was because of a faulty purge valve, and that it wasn' t really serious. I finally got around to replacing it (did it myself, but seemed fairly straight forward). I took it out for a drive, and after about 10 minutes, I could feel the car pulse slightly, almost like I was letting off the gas, and the check engine light started blinking, but only for a few seconds. Any idea what could have caused this?
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Best Answer
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thecardoc3
Member Posts: 5,843
You have described a misfire event, but without its cause being diagnosed and proven you'll only get suggestions to try tossing parts. Misfires are big issues because a misfire even one for a short duration can damage the catalysts. That's what the flashing MIL means, the computer determined that there was a catalyst damaging misfire occurring.5
Answers
I'm sorry to hear about this pulsing concern you're experiencing with your CTS. I understand you are seeking advice from forum members, however, if you are interested in getting an official diagnosis, we would be more than happy to assist in setting up an appointment at your dealership to have this addressed. If interested, please send us a private message at your earliest convenience.
Sincerely,
Chelsea D.
GM Customer Care