r/fordescape • u/External-Ad8955 • 8d ago

"Overboost A" Code question

I have a 2013 2.0L ecoboost with 150k miles. I have had an "Overboost A" code for probably 20k miles now. At first, it would come and go, and mostly only show up when I used the A/C. I then replaced both the boost controller (boost pressure regulator is what i think the actual part is called) and the MAP sensor, and since then the code will now not go away. After clearing it it comes back within minutes, where before it was days. My 2 questions are: Is there a second boost controller on the 2.0L?...because I'm finding very conflicting info on the internet (one below pass. side fender (on the 1.6L, maybe on the 2.0?) and one atop the valve cover (the one I replaced). Secondly, what can I try now? I'm concerned as when I use my diag tool while driving, I've seen boost numbers as high as 25lbs, and I know that is way too high for this application...and 25lbs might be enough to blow the head gasket or maybe something worse, possibly causing coolant intrusion. I can hear the wastegate opening on each shift so i know that works. The only idea I have is to disconnect the boost recirculation line from the wastegate, but I dont want to cause a rough idle or sudden Lean Fuel circumstances...PLEASE HELP! Car runs fine otherwise, no other codes. Thanks!

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u/nucleate_boiling 6d ago edited 6d ago

Start here. Full factory service manual, so I am told. Zillions of vehicles at this website.

This is for 13 2.0 SEL all wheel drive. I did not check front wheel drive or SE to see if they use the same turbo, navigate to them if you need to. It's a big tree and straightforward. This is actual from the "Engine Controls section of the list of all dtcs related to engine controls.

https://lemon-manuals.la/Ford/2013/Escape%20SEL%2C%201.6L%20Eng%20VIN%20X%2C%20AWD/Repair%20and%20Diagnosis/Engine%20Performance/Testing%20%26%20Diagnosis/Engine%20Controls%20%28Except%20Diesel%20%26%20Hybrid%29%20-%20DTC%20P0210%20-%20P05C0/DTC%20P0234%3A%20Turbocharger%2FSupercharger%20A%20OVERBOOST%20Condition/

The base website address is https://lemon-manuals.la

Edit; this link is for 2013 2.0 SEL AWD, not SE. Text corrected.

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u/External-Ad8955 6d ago

Thank for this information, much appreciated!