Check engine, VSC and VSC off lights on all the time, codes, P1346 and P1351

2001 TOYOTA AVALON
80,000 MILES • 3.0L • V6 • 2WD • AUTOMATIC
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JBILAND
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Engine performs very well. Scanned computer codes P11650, P1346 and P1351. Changed both cam position sensors and forward O2 sensor. Lights stayed out one drive cycle then after that came on and stay on. Again car performs very well. Obviously need some help to correct situation. Thanks
Aug 6, 2019 at 12:43 PM
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STRAILER
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Hello,

Can we double check the P11650? It has one too many numbers in it. How does the engine seem to run? Can you please shoot a quick video with your phone so we can see what's going on? that would be great. You can upload it here with your response.
Aug 7, 2019 at 7:54 PM
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JBILAND
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rescanned car this morning and only have 2 codes, P1346 and P1351. Again car starts and runs great. No driveability issues ! I am truly at a loss. Changed both cam position sensors and forward bank O2 sensor.
Aug 9, 2019 at 7:43 AM
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STRAILER
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The P1346 is a cam actuator problem while the P1351 is an ignition system issue. The P1346 can be caused by low or dirty engine oil which allows the seals to bypass

Here is a guide to show how it works:

https://www.2carpros.com/articles/how-camshaft-variable-valve-timing-works

and

https://www.2carpros.com/articles/how-to-change-engine-oil-and-filter

Let me know. Please run down this guide and report back.
Aug 9, 2019 at 12:47 PM
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JBILAND
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It seems things are getting worse each day. yesterday the car ran bad at lower RPM's you give it half or more throttle it would take off like a rocket and not miss a beat. Scan car got the following codes: P0300, P0302, P0304, P0306, P0175 and P1150. Erased codes today and it drove just fine for a while the check engine light came on. codes today were: P1150, P0300 and P0175. I'm beginning to think I have a bad ECU.
Aug 13, 2019 at 9:27 AM
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JBILAND
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Hopefully you can shed some light on this problem. Thanks
Aug 13, 2019 at 9:27 AM
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STRAILER
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It does seem to have many unrelated problems. I would get a used ECU and plug it in to see what happens or send it out to have it tested. Also we can test the wiring by using this guide and the engine wiring diagrams below:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what happens.
Aug 13, 2019 at 10:06 AM
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JBILAND
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The saga continues. Because there were so many bank 2 sensor 1 codes I first replace the O2 sensor with an OEM sensor . Car ran better but still got eng lite. New code of P0174, erased code drove again now P0125, P0174, P1150. I did get a used ECM and tried it but car wouldn't start. Put old ECM in and car runs fine but still have Eng light and VSC lights. I still think it's the ECM so I'm going to order a reconditioned one. I'll keep you posted.
Aug 18, 2019 at 8:02 AM
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STRAILER
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Yep you are headed in the right direction. Please let me know.
Aug 18, 2019 at 12:50 PM
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JBILAND
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Just an update , have a reconditioned ECU with coded keys coming . I'll let you know if it works.
Aug 23, 2019 at 3:04 PM
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STRAILER
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Good job, let me know.
Aug 26, 2019 at 11:18 AM