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Dan, Technician
Category: Toyota
Satisfied Customers: 23758
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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My RAV4 2007 now has Check engine, VSC Trac & Trac Off

Customer Question

My RAV4 2007 now has Check engine, VSC Trac & Trac Off warning lights. Its on and off, sometime on and sometime off. Just see the problem one day and took it to auto shop with PO606 Diagnostics code
Submitted: 1 year ago.
Category: Toyota
Expert:  Dan replied 1 year ago.
Hello, my name is ***** ***** I'm here to help get your problem solved. 4 cylinder or V6 engine?
Customer: replied 1 year ago.
Customer: replied 1 year ago.
V6 engine
Expert:  Dan replied 1 year ago.
This code usually means one of the rear oxygen sensors have failed but can also mean the ECM has failed. To know for sure check the oxygen sensor and air fuel ratio sensor impedance reading using a scanner. The impedance should remain stable. When cold the reading will be higher at approximately 1000 ohm reading and when it warms up the reading will be low at the 20 ohm range. If any one sensor is not stable and moves around, suspect it as the faulty part. This would be around a $250 repair to have done at a shop. Let me know if you have more questions, thanks.
Customer: replied 1 year ago.
What is ECM ? does it has anything to do with Transmission problem ?
Customer: replied 1 year ago.
Never mind .. Thanks ... Bye
Expert:  Dan replied 1 year ago.
ECM is the main engine computer. This would not be related to transmission problem but if you want to explain what transmission is doing I'll let you know if it is something I'm familiar with. Thanks.
Customer: replied 1 year ago.
Thanks. I am done ..
Expert:  Dan replied 1 year ago.
No problem, let me know if you end up running into more questions. You can reply to this answer at any time without additional fees. Thanks again and have a great evening!