Toyota Repair: check eng, trac off and vsc all light up, fuse box, time code

Question
QUESTION: 2005 Sienna about 99K, Three lights (check engine, vsc and Trac off)light up at the same time. Code is PS0037. Dose it replace the O2 senor to fix the problem?

ANSWER: DTC P0037 is a bank 1 sensor 2 malfunction, sensor 2 is always behind the catalityc converter and bank 1 is near the firewall. Each bank has it's own converter so the sensor you should replace is underneath near the firewall downstream of the converter.

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QUESTION: How many sensors in 2005 Sienna V6 FWD ? Why are all three lights up on O2 sensor malfunction instead of Check engine light on only ? Where to locate the fuse box to reset the CEL off ?

Answer
There are a total of four sensors, two in front of the cataliyc converters and two behind the converters, two for each bank, the reason the other lights are turned on is because of the check engine light, these systems are disabled when the CEL turns on and will be restored to normal after the problem is fixed.