Vsc, fwd and check engine light on
All three lights came on at the same time, had the
o2 sensor replaced, light went off, but after awhile
they came back on it’s a 2007 rav4
Is it idling a little rough? Try running an engine cleaner in the oil. The VVT will clog if it is not regularly serviced causing build up. This causes exactly what your describing. I would also look at the mass airflow. The lights were cleared when the O2 sensor was installed. They turned back on because the problem wasn't fixed. Toyota will be little to no help diagnosing this. I speak from experience. Find a good indecent mechanic that works off more than just codes.
I have a 2006 Rav 4 that had the same problem which occurred sporadically for a couple years. A friend suggested to fill it up with gas and re-tighten the gas cap but just one click as per instructions. That made the lights go off but they kept coming back on. I bought an off brand gas cap and that worked a couple weeks until I couldn't get the cap off at the pump. I bought a "Toyota" gas cap and problem solved -no more lights.
Our 2007 6-cylinder RAV4 with 80k miles had the VSC, 4wd, & Check Engine lights all come on, and the engine was in a rough idle. After a few disconnecting the battery and reconnecting, the lights appeared. Another Forum said it may be due to a faulty spark plug coil. I replaced all six coils and plugs. The car now idles perfectly, and the lights don't come on. There's also a great YouTube video for the 6-cyllinder RAV4 from "2CarPros".
Look for this, on my 2008 Rav4,
The big picture to help find it, noticed this as I was cleaning my mass air sensor.
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#3Mandy Crowe JohnsonReputation1,320
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