Hi. Had a non-dealer master mechanic replace the T-belt, tensioner, water pump, rear brakes, plugs, air filter. After driving the car for 2 miles the VSC and VSC OFF as well as CHECK ENGINE light came on. The codes generated by scanner were p0154 and p0051. He replaced one oxy. sensor with Denso which is apparently factory. The light came back on again. He told me he has checked everything and is baffled. Took the car to local a Lexus Dealer. Same Codes were generated. They told me that I need to use Toyota OEM Oxyg. sensor and paid about $400.00 parts and labor to replace one sensor. 2-4 miles on to my way home, the same lights came back on. I am baffled. Just lost The car runs fine. Please help. I am just afraid that this could be really costly! I really appreciate it.
