When coming down a steep, long grade from about 4000 ft elevation ( Grapevine on I5, north of Los Angeles ) at highway speeds (65 to 70mph) my CEL will flash on and off several times, only staying on for about 5 to 10 seconds.
Otherwise, CEL is never on.
Engine seems to be running fine. No codes.
It's a stock GTP.
Anyone have this happen ?
What was the cause ?
Thanks...