Coolant sensor and fuel refresh

[HaydenJMK]

My 4xe stopped going into hybrid mode 4 months ago and I was told it was due to a malfunctioning coolant sensor. The part was on backorder, but thankfully replaced last week. That allowed me to use electric mode, but it only lasted one week. I called the dealer and was told that I needed to drive the car for 25 minutes at an engine temp of 205 degrees and add 4 gallons of gas, and that should fix it. I feel like the dealer was just trying to get me off the phone. Has anyone heard of this? Or is anyone experiencing something similar?

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[wranglerbro]

Yes, that's accurate per the manual.

 

[sentience]

20 minutes to up to 2.5 hours. But otherwise, yeah, your dealership is fairly accurate in the assessment.

Actual statement from Jeep:

How can I get Electric mode back?

The use case which leads to this level of dilution can vary, but the path to resolution is always the same:

· Start the engine and allow engine oil to reach normal operating temperature. 169°F (76°C) is the minimum, but normal operating temperature is above 194°F (90°C). Elevated speed and load will warm the engine oil most quickly.

· Continue running the engine until FORM is no longer shown in the Message Center of the instrument cluster. Depending on the dilution level, oil temperature and outside temp, this can take from 20 minutes to 2.5 hours.

· In case the above steps are not possible, change the engine oil and reset the oil life indicator.

· Never reset the oil life indicator without changing the engine oil.

It's possible that some use cases lead to a lot of dilution and not enough evaporation to compensate. In this case FORM will return as long as the weather remains cold. We have high confidence that these frustrations will be resolved when the weather becomes warmer.

I own a 2021. I’ve never been able clear it consistently for any of the past three winters. But, YMMV.

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