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I've got 2007 Rav4 (4 cylinder) with the Check Engine light…

Customer Question
I've got 2007 Rav4...

I've got 2007 Rav4 (4 cylinder) with the Check Engine light on, along with 4WD and VSC light being displayed. A scan with my Genisys EVO scanner showed Code P0031, indicating the upstream oxygen sensor. I replaced it with quality Denso sensor, only to have the same results.

Mechanic's Assistant: Does the light stay on, or does it blink?

Stays on

Mechanic's Assistant: Are you fixing your RAV4 yourself? What have you tried so far?

I am fixing it myself---all I've tried was the upstream oxygen sensor. I cleared the code only to have the Check Engine light come back on within 10 seconds followed by the VSC and 4WD lights. Scan still shows problem with the upstream oxygen sensor.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

That's all I got.

Submitted: 3 months ago.Category: Toyota
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Answered in 6 minutes by:
3/24/2018
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 3 months ago
Ted Ritter
Ted Ritter, Toyota Master Tech
Category: Toyota
Satisfied Customers: 4,710
Experience: Toyota Master Tech, ASE Certified
Verified

Thanks for posting

Please give me a few minutes to check a couple of things and get back to you,.

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Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 3 months ago

Thanks for waiting

Standing in front of the engine are there two sensors at the top of the exhaust manifolds?

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Customer reply replied 3 months ago
Just one
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 3 months ago

Ok and it points up on top of the manifold?

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Customer reply replied 3 months ago
It points forward (towards the radiator)
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 3 months ago

Is it the 2AZ-FE engine? Can you send a picture of it?

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Customer reply replied 3 months ago
The vehicle currently is not here---it is a '07 Rav4 2.4 (four cylinder)
Customer reply replied 3 months ago
It does.
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 3 months ago

I​t's a problem with the sensor heater control circuit, it will need further diagnosing , I'm attaching some test information that may help you or a mechanic you may go to do the test flow chart.

http://www.trav4.net/oxygen_a_f_sensor_heater_control_circuit-411.html

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