P0365 and P0390 are sensor B for banks 1 and 2. IIRC that’s both exhaust (outtake?) cams. Strange both throw faults at the same time. Reset codes and check for codes as soon as you can when the CEL comes on.

Those codes typically mean bad sensor or wiring problem. I don’t know whether they share circuitry in the ECU for a single failure to throw both codes. Maybe they’re adjacent pins at some connector that’s subject to corrosion. Maybe they share a ground. I’d hate to spend money on two Denso sensors if the sensors you have aren’t the problem. Starting at the sensors, unplug the connectors, inspect them, spray with electronic parts cleaner then reconnect firmly. Follow the wires to the next connector/s until you reach the ECU or lose the wires in a bundle.

VSC (and traction control and ABS) lights are likely related to the cam sensor faults. Focus on the cam sensors.

Sixto
‘04 LE FWD 231K miles

 

P0365 and P0390 are sensor B for banks 1 and 2. IIRC that’s both exhaust (outtake?) cams. Strange both throw faults at the same time. Reset codes and check for codes as soon as you can when the CEL comes on.

Those codes typically mean bad sensor or wiring problem. I don’t know whether they share circuitry in the ECU for a single failure to throw both codes. Maybe they’re adjacent pins at some connector that’s subject to corrosion. Maybe they share a ground. I’d hate to spend money on two Denso sensors if the sensors you have aren’t the problem. Starting at the sensors, unplug the connectors, inspect them spray with electronic parts cleaner then reconnect firmly. Follow the wires to the next connector/s until you reach the ECU or lose the wires in a bundle.

VSC (and traction control and ABS) lights are likely related to the cam sensor faults. Focus on the cam sensors.

Sixto
‘04 LE FWD 231K miles

Thanks so much Sixto (ignore my last reply - didn't see you post) you answered exactly what I was asking again. I just went out and, not even knowing which was the cam, wiggled some wires and VSC went out so hoping just old wiring. it looks pretty weathered in there.

 

Also would love to know how to figure out if I would need entire new sensor or hopefully just connectors. it's super dusty under engine cover so hoping maybe a good cleaning might do the trick?

 

Both banks having a problem is unusual. As always, when weird sensor problems crop up, I would check the battery, alternator and terminals. If you had a 3MZ, I'd be leaning towards a timing belt, but you have a 2GR. It IS possible that the timing chain is worn, but that's highly unlikely. If it's not the charging system, my guess is wiring.

 

Thanks BillG. They did check the battery and it’s at 80% so I can rule that out. But yes, not happy about the 2 bank issue. I’m going to put a new connector in the more accessible bank and see how that goes. I believe Bank 2 is the front one.

 

Yes, bank 2 is the one closer to the radiator. Exhaust cam is on the outside over the exhaust manifold.

Sixto
‘04 LE FWD 231K miles

 

Thanks again! You guys are AMAZING!🤩

 

Given your Sienna's mileage and use, it might be worth replacing both sensors to be safe.

 

Thanks @Monato Yes, of course. My budget is extremely limited so trying to find most affordable solutions. But did just order a $40 sensor from ebay so hoping replacement isn't too complicated. At least on Bank 2. Not even thinking of replacement on B1 yet 😅