Powerboost not turning engine off on idle

[RocketFistMooga]

Weird thing today. After driving I sat in a parking lot and the engine idoled for 20 minutes without turning off. Heat was not on. Constant 1,300 rpm’s. Why? Had to turn truck off and leave to go to a meeting. Wonder how long it would have kept going…

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[Ford4Ever]

Is Eco Idle turned on?

 

[HammaMan]

Is Eco Idle turned on?

If it's idling at 1300 RPM, eco is on

 

[PowerboostedF150]

Eco on or off doesn’t matter. Forscan will show the hi voltage battery state of charge go to 59, 60, 61%, but the engine does not turn off. If you put it in drive, it should turn off, but it’s a fault with these, software based, and none of the stealerships around me have any idea how to fix it. Mine is almost out of powertrain warranty, then it would be crazy to pay 5 days of diagnostics, without any resolution.

 

[netized]

Mine does the same thing.Digging further, I got a message saying “engine running due to battery charging “. Sometimes it works; sometimes it doesn’t.

 

[Karytas80]

I noticed my engine runs longer to charge recently but nowhere close to 20 minutes. On weekdays, I don't drive much and even after a short 1-2 mile drives, the engines runs 3-5 minutes or little longer to charge the battery. I thought it was kinda funny to run the engine for 5-7 minutes to charge the battery after driving about 2 minutes. I tried with heater/ac off but it didn't make any changes about the charging time.

 

[NotMyName]

Usually it means you need a new battery. My 2017 ecoboost stopped turning off at idle. Checked the battery and it was going bad. Since I kinda enjoyed the truck staying on, I waited until just before it got cold and changed the battery. Once the new battery was installed, everything went back to normal.

The blue Bronco in my signature pic only has about 6509 miles and was delivered in Sept. 2021. It already had its battery replaced last month. Based on all the posts on this forum and Bronco6g, it seems Ford had an issue with batteries.

 

[mxwrk]

2022 Lariat PB here with 15k on the clock. Just like a flip of a switch mine started doing this too. Not fully consistent but definitely a major change overnight. Doesn’t switch to electric driving under breaking or at idle, ICE kicks on more often etc. I’m hoping it’s just the 12v battery. Anyone had and fixed this issue and if so, did you replace both 12v batteries? I checked the hybrid battery SOC and ICE kicks in at 40% and shuts off at 63.5% which seems normal?

 

[mxwrk]

Just had my 12v under hood battery tested and performed like new. Is it the one under the rear seat I need to focus on?

 

[Jerome10]

This definitely seems odd. Is there any chance the truck is in Sport or Tow-Haul modes? I believe both of those prevent electric-only driving.

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