This weekend was the first time that I took my truck up to Silver Lake MI. I loved it. Unfortunately I beat my 4Runner harder than I thought I would. The only breakage resulted from an already cracked plastic bumper guard that fell off after doing 45 mph in the sand hitting a series of whoops. All in all it was a blast but now I have a code 6 showing up. (6) Engine Speed (RPM) sensor, circuit Ignitor or circuit, distributor, ECU. What could have caused this and how do I fix it?