This Ranger has only 526 miles on it, the code 0 84 2 has only came up one or two times. as always drive it in low @ 4000 rpm for 30 seconds or so and it resets the light. well not now !! the light is on and will not go out. removed the censor (no shavings or trash on it) checked the plugs all is good, even back to the ECM. ordered the upgraded part number censor today, so maybe it will fix it? has anyone had the light come on with this code and NOT be able to reset it or make it go out?