Hi ,

I bought a used 09 Toyota Venza , V6 AWD a few months ago. Fuel economy was OK in the first couple of months (around 10-11 L/100 km) combined.
Six weeks ago, it had problem of O2 sensor. I drove for a couple of weeks with that problem before I get changed the O2 sensor by a Toyota Dealer. Once that O2 sensor problem appeared, the fuel economy is very bad. The car fuel economy is 14.5 L/100 km (16 mpg) for the last 3 tanks of gas. In one tank of gas, it did only 375 km on average. I know it is a V6 but still this is far away from the expected fuel economy.

I already checked tire pressure which is fine. I am not sure what cause this poor fuel economy. Is it start of Winter here in Canada or the O2 sensor or something else went bad.

I am just wondering if anyone else has this issue or anything I can ask my dealer to check in particular. I am thinking to take it to Toyota dealer for regular service and can ask them to check for this problem.

Thanks in advance,