Vsc, fwd and check engine light on

Asked by Jan 05, 2018 at 01:51 PM about the 2007 Toyota RAV4

Question type: Maintenance & Repair

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

2 Answers

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.

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