What Is FORM (Fuel Oil Refresh Mode) How Do I Avoid It? 4xe Jeep Wrangler

Summary

In this video, Mike from Jeeps on the Run discusses the 'Fuel Oil Refresh Mode' (FORM) in the Jeep 4xe hybrid vehicle. He explains how this mode activates when the electric portion of the vehicle is unavailable, forcing the car to rely on its internal combustion engine (ICE). This is designed to prevent fuel dilution in the oil, especially in cold weather conditions. Mike offers insights into how to manage and avoid FORM, such as using the e-save mode and letting the engine reach operating temperature. He also highlights that FORM is normal but can become problematic if the vehicle gets stuck in it.

Takeaways

• 😀 FORM (Fuel Oil Refresh Mode) is a feature in Jeep 4xe hybrid vehicles designed to protect the engine by preventing fuel from contaminating the oil.
• 🚗 FORM occurs when the engine doesn't reach operating temperature, causing fuel to mix with oil and potentially dilute it.
• 🧊 Cold weather and short trips are the most common conditions that trigger FORM in the Jeep 4xe.
• 💡 FORM is triggered by an algorithm that detects insufficient fuel vaporization due to low engine temperatures.
• 🔧 FORM is a normal feature in hybrid vehicles and is designed to extend engine life by preventing oil dilution.
• ⏳ To avoid FORM, make sure the engine reaches its operating temperature by driving longer trips or using the E-save mode.
• 🔄 Never reset the oil life indicator without changing the oil, as this may confuse the system and affect how FORM works.
• 🚙 Short trips with only a couple of miles of engine use may increase the likelihood of FORM occurring, as the engine hasn't had time to warm up.
• 🛠️ If the vehicle is stuck in FORM, driving the vehicle for an extended period (up to two hours) can help it reach operating temperature and resolve the issue.
• ⚠️ If FORM is consistently triggered, it could indicate a mechanical failure or component issue that might need to be addressed after a recall update.
• 📝 FORM helps protect the engine from oil dilution, which can happen when the engine is cold and the fuel doesn't vaporize fully, similar to how traditional engines operate.

Q & A

What is Fuel Oil Refresh Mode in a Jeep 4xe?

Fuel Oil Refresh Mode (FORM) occurs when the electric portion of the Jeep 4xe is unavailable, and the vehicle defaults to using its internal combustion engine (ICE). This mode helps address issues with fuel dilution in the engine oil caused by incomplete fuel vaporization, especially in hybrid vehicles.

Why does the Jeep 4xe enter Fuel Oil Refresh Mode?

The Jeep 4xe enters Fuel Oil Refresh Mode when the engine hasn't reached the proper operating temperature, causing fuel to mix with the oil instead of vaporizing. This is common in hybrid vehicles, where short bursts of internal combustion may not heat the engine sufficiently.

How does direct injection contribute to Fuel Oil Refresh Mode?

In direct injection engines, fuel is injected directly into the combustion chamber. If the engine isn't fully warmed up, the fuel may not vaporize completely, leading to dilution in the oil. Fuel Oil Refresh Mode helps address this by forcing the engine to run and reach its operating temperature.

Is it normal for the Jeep 4xe to enter Fuel Oil Refresh Mode?

Yes, it is normal for the Jeep 4xe to enter Fuel Oil Refresh Mode, especially in colder climates or when short trips prevent the engine from reaching its operating temperature. This mode is designed to protect the engine by preventing fuel from diluting the oil.

What should I avoid doing to prevent issues with Fuel Oil Refresh Mode?

Avoid resetting the oil life indicator without changing the oil, as it can trick the Jeep's system into thinking the oil has been replaced. This can disrupt the algorithm that manages Fuel Oil Refresh Mode.

How can I avoid staying stuck in Fuel Oil Refresh Mode?

To avoid staying stuck in Fuel Oil Refresh Mode, ensure that the engine reaches operating temperature by driving longer distances on internal combustion or using e-save mode to help the engine warm up during longer trips.

Can driving habits affect whether the Jeep 4xe enters Fuel Oil Refresh Mode?

Yes, driving habits can affect whether the Jeep 4xe enters Fuel Oil Refresh Mode. Short trips that don't allow the engine to reach operating temperature are more likely to cause the vehicle to enter this mode. Longer trips or using e-save mode can help avoid it.

How does ambient temperature impact Fuel Oil Refresh Mode?

Cold weather can trigger Fuel Oil Refresh Mode more frequently. In low temperatures, the engine may struggle to reach operating temperature, which can result in incomplete fuel vaporization and the need for Fuel Oil Refresh Mode.

What should I do if my vehicle gets stuck in Fuel Oil Refresh Mode?

If your vehicle gets stuck in Fuel Oil Refresh Mode, the best course of action is to drive the vehicle for a longer period to allow the engine to reach the necessary operating temperature. In some cases, changing the oil and resetting the oil life monitor can help.

Can Fuel Oil Refresh Mode be caused by mechanical failures?

Yes, mechanical failures can also cause the vehicle to get stuck in Fuel Oil Refresh Mode. After the last recall update, some faulty components may cause this issue, and it could trigger a check engine light.