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2025 Engineering Test Mode Access ?

Tony Pandy

2.5L Hybrid
Well-known member
First Name
Tony
Joined
Oct 31, 2024
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Location
Florida
Vehicle(s)
2025 Lariat Hybrid, F53 Chassis Class A Motorhome, Acura TLX, '79 280ZX
Engine
2.5L Hybrid
Anyone know how to gain access on the 25 Lariat ? The previous MY steps (Hold "OK" Button and push Engine Start until EM pops up) does not Work for me on my 25 Lariat. Also can't Gain Access to the Audio Test mode like older Sync 3 allowed.
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thesilverstig

2.5L Hybrid
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First Name
Otto
Joined
Jan 24, 2025
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Location
Detroit
Vehicle(s)
2025 Maverick XL Hybrid AWD
Engine
2.5L Hybrid
Anyone know how to gain access on the 25 Lariat ? The previous MY steps (Hold "OK" Button and push Engine Start until EM pops up) does not Work for me on my 25 Lariat. Also can't Gain Access to the Audio Test mode like older Sync 3 allowed.
Seek back and volume down will get you speaker test and other sync 4 diagnostics. I too am wondering what the button combo is for the engineering mode in the gauges.
 

kxpqzt

2.5L Hybrid
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Kxp
Joined
Aug 2, 2024
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Location
46075
Vehicle(s)
2025 XLT
Engine
2.5L Hybrid
Just played with this a bit, on the XLT hybrid it's still pressing and holding brake and the ok button, then press start. You'll see "ET" appear on the dash, that's when you release the ok button. If you keep holding OK, it will cancel test mode.

Edit: just saw you can also adjust the Average Fuel Economy (AFE) Bias based on your real world calcs.
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