I took my 2000 Nissan Frontier to a shop and had a pair of oil cover
gskets put on it. I got the truck back and it drove fine for about
three days before the service light came on. I took the truck to an
auto parts store and they told me that I was getting codes that
indicated an EGR flow malfunction and a knock sensor circuit problem.
I posted this problem on another Internet group and a guy who is
suppossed to be a Nissan tech told me that it sounded like the
throttle body sensor to him. I know that the sensor had to be
disconnected in order to put the valve cover gaskets on. When I got
the truck back, I looked under the hood and wondered if he had crossed
the connectors on the sensor, meaning, if he had his positives and
negatives missed up. Is this possible? How can I tell if the TPS is
not plugged in properly. I have had this truck since it was new and
the service engine light has never come on. I have 180K miles on it
and need it to last as long as possible. can some one help?! I am
taking the truck back to this shop Tuesday anyway if I can't resolve
the problem.