i got a question....my maxima got the service engine soon light on n when i read the code its coming up p0021....could it b the camshaft position sensor messed up or what....need ya help please n thanks

 

take a look at this. http://answers.yahoo.com/question/in...9132250AAJzrbY

 

i neva messed with the timing chain....when i bought ma car 1month ago it was starting up bt would take long so i took it baq n dey said ok we will change the crank position sensor so dey did n wen i get it baq i get the light on n dey saying its not the camshaft position sensor...so idk dat light is getting mi mad lol.