An illuminated Check Engine Light could be caused by a defective VVT-i controller, which changes cam timing for optimal power. Updated parts are available and the repair may be covered under the powertrain warranty.Google+
Car Problem Reports
Scion xB Check Engine Light Due to Defective VVT-i Controller
Scion xB Problem
Average Mileage: 82,195 mi (31,000 mi - 147,000 mi)
Check engine light, my traction light, and the 'VSC off' light is on. Car is stock. Driver (me) is PISSED. I haven't ran the codes on it yet ( I work for Hyundai and drive a toyota hahaa so I cant take it there) and I need to know what this means and how much this is gonna cost me. I can't seem to find that out online. Thanks.
Visitor, 2005 Scion xB, 44,000 mi
Check Engine light (which also causes traction off) caused by bad cam pulley. The oil-pressure-activated variable cam timing mechanism failed. Fixed by replacing the cam pulley.
This has been an ongoing problem since the 50,000 mile mark. I have been advised that this is caused by an automatic sensor and told not to worry just to reset. It come on and goes aft all the time.
Visitor, 2005 Scion xB, 92,000 mi
I have this as well - been quoted $1422 to fix. told that if I just leave it, it will disintegrate and damage the engine. Any ideas if this cost is reasonable or the risk of damage is true?
Visitor, 2006 Scion xB, 147,000 mi
Nothing was done and all of a sudden last night after we left familys driveway to go home from thanksgiving dinner VSC light Trac Off light and Check Engine Light came on trying to troubleshoot the problem before spending money on the box. Any ideas it's my boyfriends car and i work at a dealership they told me to unplug the battery for 5 mins plug it back in and then if it comes back on get the codes to find the problem. I hear alot about sparkplugs and 02 sensors gas caps seems like it could be a menagerie of things hope someone has a clue to help.
Visitor, 2006 Scion xB, 31,000 mi
check engine light comes on and stays on until the dealers service man does something under the dash or hood and it goes out. Takes about 1 to 2 min. to fix.....
Visitor, 2008 Scion xB
Car is overheating I want to know how to repair it
Visitor, 2005 Scion xB, 112,345 mi
check engine light is on the code that come on poo12 how much does it cost
Visitor, 2010 Scion xB, 40,000 mi
havent fixed yet but i will take to school and scan tool it soon. vvt-i,huh?we will see.
Visitor, 2006 Scion xB, 68,000 mi
Just had Scion dealer check engine,vsc,trac lights. vvti was diagnosed. $244 for part.$499 total.