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2016 Subaru Outback 2.5i Premium 5 v reference irregularity P0122 and P0222

  • brianmstoltzfus
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2 months 3 weeks ago #91938 by brianmstoltzfus
2016 Subaru Outback 2.5i Premium 5 v reference irregularity P0122 and P0222 was created by brianmstoltzfus
I am posting a scope capture of battery voltage, 5 v reference to the throttle body, and throttle body position sensor 1 data. The irregularity in the 5 v reference threw me way off until I compared it with a known good car and found it looks identical. The irregularity changes with engine rpm, it is happening twice per revolution. Does anyone know the reason for this? 1 picture is scope set to 1 ms per frame and the other picture is zoomed out. I am diagnosing codes P0122 and P0222 in this car. The codes set once and caused the car to go into fail-safe but I have not been able to duplicate. 
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  • Chad
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2 months 2 weeks ago #91970 by Chad
Replied by Chad on topic 2016 Subaru Outback 2.5i Premium 5 v reference irregularity P0122 and P0222
I suspect that what you are seeing is just noise from coil/ignition events. The more you use a scope, the more you will see this. The more you see it, the easier it will be to ignore it. 
"Knowledge is a weapon. Arm yourself, well, before going to do battle."
"Understanding a question is half an answer."
I have learned more by being wrong, than I have by being right. :-)

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2 months 1 week ago #91985 by brianmstoltzfus
Replied by brianmstoltzfus on topic 2016 Subaru Outback 2.5i Premium 5 v reference irregularity P0122 and P0222
Thankyou for this help!

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