2022 Jeep Wrangler Refueling Diesel Engine User Manual
REFUELING THE VEHICLE — DIESEL ENGINE (IF EQUIPPED)
The fuel filler cap is located on the driver’s side of the vehicle. If the fuel filler cap is lost or damaged, be sure the replacement cap is the correct one for this vehicle.
- Open the fuel filler door.
- Remove the fuel cap by rotating it counterclockwise.
- Diesel Fuel Filler
- DEF Filler
- Fully insert the fuel nozzle into the filler pipe.
- Fill the vehicle with fuel.
NOTE - When the fuel nozzle “clicks” or shuts off, the fuel tank is full.
- Wait five seconds before removing the fuel nozzle to allow excess fuel to drain from the nozzle.
- Remove the fuel nozzle, reinstall the fuel cap and close the fuel filler door.
NOTE
Tighten the fuel filler cap about a quarter turn until you hear one click. This is an indication that the cap is properly tightened.
CAUTION
For diesel engines, only use diesel fuel for motor vehicles in accordance with ASTM D-975 Grade S15 specifications. The use of other products or mixtures may damage the engine beyond repair and consequently void the warranty, due to the damage caused. If you accidentally introduce other types of fuel into the tank, do not start the engine. Empty the tank. If the engine has been run for even an extremely limited amount of time, you must not only drain the fuel tank, but the rest of the supply circuit as well.
AVOID USING CONTAMINATED FUEL
Fuel that is contaminated by water or dirt can cause severe damage to the engine fuel system. Proper maintenance of the engine fuel filter and fuel tank is essential see page 362.
BULK FUEL STORAGE — DIESEL FUEL
If you store quantities of fuel, good maintenance of the stored fuel is also essential. Fuel contaminated with water will promote the growth of “microbes.” These microbes form “slime” that will clog the fuel filtration system and lines. Drain condensation from the supply tank and change the line filter on a regular basis.
NOTE
When a diesel engine is allowed to run out of fuel, air is pulled into the fuel system. If the vehicle will not start see page 364.
WARNING
Do not open the high-pressure fuel system with the engine running. Engine operation causes high fuel pressure. High-pressure fuel spray can cause serious injury or death.
DIESEL EXHAUST FLUID
- Your vehicle is equipped with a Selective Catalytic Reduction (SCR) system to meet the very stringent diesel emissions standards required by the Environmental Protection Agency.
- The purpose of the SCR system is to reduce levels of NOx (oxides of nitrogen emitted from engines) that are harmful to our health and the environment to a near-zero level. A small quantity of Diesel Exhaust Fluid (DEF) is injected into the exhaust upstream of a catalyst where, when vaporized, it converts smog-forming nitrogen oxides (NOx) into harmless nitrogen (N2) and water vapor (H2O), two natural components of the air we breathe. You can operate with the comfort that your vehicle is contributing to a cleaner, healthier world environment for this and generations to come.
System Overview
- This vehicle is equipped with a Diesel Exhaust Fluid (DEF) injection system and a Selective Catalytic Reduction (SCR) catalyst to meet the emission requirements.
- The DEF injection system consists of the following components:
- DEF tank
- DEF pump
- DEF injector
- Electronically-heated DEF Lines
- NOx sensors
- Temperature sensors
- SCR catalyst
The DEF injection system and SCR catalyst enable the achievement of diesel emission requirements; while maintaining outstanding fuel economy, drivability, torque and power ratings.
For system messages and warnings see page 120.
NOTE
- Your vehicle is equipped with a DEF injection system. You may occasionally hear an audible clicking noise from under the vehicle at a stop. This is normal operation.
- The DEF pump will run for a period of time after the engine shutdown to purge the DEF system. This is normal operation and may be audible from the rear of the vehicle..
Diesel Exhaust Fluid Storage
Diesel Exhaust Fluid (DEF) is considered a very stable product with a long shelf life. If DEF is kept in temperatures between 10° and 90°F (-12° and 32°C), it will last a minimum of one year. DEF is subject to freezing at the lowest temperatures. For example, DEF may freeze at temperatures at or below 12°F (-11°C). The system has been designed to operate in this environment.
NOTE
When working with DEF, it is important to know that:
- Any containers or parts that come into contact with DEF must be DEF compatible (plastic or stainless steel). Copper, brass, aluminum, iron or non-stainless steel should be avoided as they are subject to corrosion by DEF.
- If DEF is spilled, it should be wiped up completely.
Adding Diesel Exhaust Fluid
The DEF gauge (located on the instrument cluster display) will display the level of DEF remaining in the tank page 120.
NOTE
Driving conditions (altitude, vehicle speed, load, etc.) will affect the amount of DEF that is used in your vehicle.
DEF FILL PROCEDURE
NOTE: For the correct DEF fluid type see page 424.
- Remove cap from DEF fill inlet (located in fuel door).
- Diesel Fuel Filler
- Diesel Exhaust Fluid Filler
- Insert DEF fill adapter/nozzle into DEF fill inlet.
NOTE
- The DEF gauge may take up to five seconds to update after adding a gallon or more of Diesel Exhaust Fluid (DEF) to the DEF tank. If you have a fault related to the DEF system, the gauge may not update to the new level. See an authorized dealer for service.
- The DEF gauge may also not immediately update after a refill if the temperature of the DEF fluid is below 12°F (-11°C). The DEF tank heater will possibly warm-up the DEF fluid and allow the gauge to update after a period of run time.
- Under very cold conditions, it is possible that the gauge may not reflect the new fill level for several drives.
- Excessive overfilling of the DEF tank can result in a MIL lamp/fault code and inaccurate level readings.
Refilling With Nozzles
You can fill up at any DEF distributor. Proceed as follows:
- Insert the DEF nozzle in the filler, start refilling and stop refilling at the first shut-off (the shut-off indicates that the DEF tank is full). Do not proceed with the refilling, to prevent spillage of DEF.
- Extract the nozzle.
- Stop filling the DEF tank immediately when any of the following happen: DEF stops flowing from the fill bottle into the DEF fill inlet, DEF splashes out the fill inlet, or a DEF pump nozzle automatically shuts off.
- Reinstall cap onto DEF fill inlet.
Refilling With Containers
Proceed as follows:
- Check the expiration date.
- Read the advice for use on the label before pouring the content of the bottle into the DEF tank.
- If systems that cannot be screwed in (e.g. tanks) are used for refilling after the indication appears on the instrument panel display page 116 fill the DEF tank with no more than 2 gallons (8 liters).
- If containers which can be screwed to the filler are used, the reservoir is full when the DEF level in the container stops pouring out. Do not proceed further.
CAUTION
- To avoid DEF spillage, and possible damage to the DEF tank from overfilling, do not “top off” the DEF tank after filling.
- DO NOT OVERFILL. DEF will freeze below 12ºF (-11ºC). The DEF system is designed to work in temperatures below the DEF freezing point, however, if the tank is overfilled and freezes, the system could be damaged.
CAUTION
- When DEF is spilled, clean the area immediately with water and use an absorbent material to soak up the spills on the ground.
- Do not attempt to start your engine if DEF is accidentally added to the diesel fuel tank as it can result in severe damage to your engine, including but not limited to failure of the fuel pump and injectors..
- Never add anything other than DEF to the tank – especially any form of hydrocarbons such as diesel fuel, fuel system additives, gasoline, or any other petroleum-based product. Even a very small amount of these, less than 100 parts per million or less than 1 oz. per 78 gallons (295 liters) will contaminate the entire DEF system and will require replacement. If owners use a container, funnel or nozzle when refilling the tank, it should either be new or one that has only been used for adding DEF. Mopar® provides an attachable nozzle with its DEF for this purpose.