MR RED LEXUS

this is a pain my is200 has started going all funny especially in the winter. the cars heater blows cold on passenger side and hot on drivers side, it stared on the left and it feels like its slowly coming to drivers side, any ideas does anyone else have the same issue??? my friends lexus does the same but his one is just blowing cold now. started off like mine....

Well they billed me for timing belt kit thats suppose to include tentioner kit so garage guy says, hiQ eastham high street south people its a NO GO THEY WILL MESS YOUR CAR UP..

Hi thanks for responce, just full service plugs filters oil cambelt and tentioners aux belt. The belt is on properly i got another mechanic to verify its correct. The garage people saying it a coincidence and it could be a sensor or pully, i been chasing that garage for months im going to bill him cost of re doing all work. Just want that sign to go off its doin my head in lol could it be anything else or anyone had similar issues ??

: HI EVERYONE CAN SOMEONE PLEASE HELP ME WITH MY PROBLEM, I HAD MY TIMING BELT CHANGED AND FEW HOUR LATER THE ENGINE MANAGEMENT LIGHT CAME ON, DIAGNOSTIC SAYS P1346 VVT CAMSHAFT POSITIONING PROFORMENCE PROBLEM BANK 1. 1) TIMING WAS OUT BY ONE TEETH!! :duh: 2)) I GOT TIMING CHECKED MADE TO PUT BACK ON PROPERLY, MARKED UP CORRECT AND GOT ANOTHER GARAGE TO CHECK IT WAS OM PROPERLY. SOO NOW ITS BANG ON CORRECT. B) ENGINE MANAGEMENT LIGHT I GOR RESET BUT IT COMES BACK ON, I HAVE NO IDEA WHAT TO DO BECAUSE I CHANGED VVT SENSOR AT FRONT OF ENGINE AS WELL DIDN'T MAKE A DIFFERENCE :duh: DRIVES OKAY THEN AGAIN MY FRIENDS LEXUS SEEMS TO PICK UP SPEED MORE QUICKER..?? ANYONE CAN HELP??