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2010 F150 4.6L 3V Failed Emissions, O2 and O2 Heated Not Ready

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Old 11-14-2017, 03:22 PM   #1
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Default 2010 F150 4.6L 3V Failed Emissions, O2 and O2 Heated Not Ready

Hi all,

New to the forum. I have a 2010 F150 XLT with the 4.6L V8 (3-valve) with 112k miles.

I recently failed emissions test in Texas with 2 tests "not ready."
Both the O2 and O2 heated showed that.
All others, including EVAP and CAT were "ready."
EGR showed as "not available."
Most issues like this seemed to report a code and/or not pass one or more of the other tests.

I have never received a fault/DTC code, and still currently don't have one.

My mechanic told me the sensors are operating properly (from an engine-running standpoint).

Any tips on diagnosis?

I have also noticed the heat shield on top of the transmission is sagging and touching the O2 connector. I will try to see if that changes things, but in the mean time, does anyone know a part number or name for this heat shield?
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Old 11-14-2017, 03:39 PM   #2
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When is the last time the battery was disconnected or power was lost on the truck? In general, having a not-ready indicator but without an actual check engine light just means not enough drive cycles have happened since everything was last reset.

Heat shield isn't going to make any difference. It is just making sure the wires and clips don't get too hot. They aren't melting, so it is doing its job.
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Old 11-14-2017, 03:49 PM   #3
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The heat shield is wet. I'm dealing with the AC drain issue right now.

I've driven the truck for months since the battery was disconnected - I think it was in July.

Since then I've driven nearly every day, rush hour style as well as long distance highway.
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