Eco Mode in your Jeep Grand Cherokee is supposed to save you money at the pump, but when it makes your ride feel sluggish, jerky, or just plain off, it’s more of a headache than a benefit.
Maybe your acceleration feels weak, shifts are rough, or you’re not seeing the fuel savings you expected. Thankfully, many of these problems can be fixed with a quick button press, a software update, or a minor repair.
Let’s explore the most common Eco Mode problems and the steps you can take to get the performance and efficiency you deserve.
1. Harsh or Jerky Transmission Shifts in Eco Mode
Inconsistent Shift Points or Delayed Upshifts
If your Jeep Grand Cherokee feels lurching or hesitating when shifting gears in Eco Mode, you’re likely dealing with awkward shift timing or delayed upshifts.
This issue is common in 2014 and newer WK2 models where Eco Mode alters the transmission’s behavior to prioritize fuel efficiency. The result? Shifts that feel rough or poorly timed, especially at lower speeds or during stop-and-go traffic.
Why This Happens
1. Transmission Software Calibration:
Eco Mode is designed to keep the engine at lower RPMs to save fuel. This often means delayed upshifts or holding gears longer, making shifting feel clunky or abrupt.
2. Torque Converter Lockup:
The torque converter, which helps transfer power from the engine to the transmission, may engage too aggressively in Eco Mode, causing a sudden jolt or hesitation.
How to Smooth Out the Shifts
1. Check for Software Updates:
Jeep has released several Transmission Control Module (TCM) updates to improve shift quality. Visit a dealership or use an OBD-II scanner to see if your vehicle runs the latest software. Updating the TCM can often resolve harsh shifting issues.
2. Turn Off Eco Mode:
Press the Eco button to disable Eco Mode temporarily. If your Jeep shifts smoothly without Eco Mode, you’ve pinpointed the cause. This is a quick fix for situations where you need smoother performance, like city driving or stop-and-go traffic.
3. Torque Converter Inspection:
If disabling Eco Mode doesn’t help, the torque converter might be faulty. A mechanic can inspect it for lockup issues or wear. If necessary, reprogramming or replacing the torque converter can restore smoother shifting.
4. Adaptive Reset:
The transmission adapts to your driving habits over time. Performing an adaptive reset can help the system “relearn” its shift points. This can be done at a dealership or with a scan tool.
2. Sluggish Acceleration and Reduced Engine Responsiveness
Lack of Power on Throttle Input
One of the most common complaints with Eco Mode in the Jeep Grand Cherokee is sluggish acceleration. When you press the gas pedal and feel like you’re getting nowhere fast, it’s usually because Eco Mode is holding back engine power to maximize fuel economy.
This is especially noticeable when trying to merge onto highways, overtake other vehicles, or drive up steep inclines. For many drivers, the lack of immediate throttle response makes the car feel underpowered and less enjoyable.
Why This Happens
1. Throttle Mapping Adjustments:
In Eco Mode, the vehicle modifies the throttle response to be less sensitive. This helps save fuel by preventing quick, aggressive acceleration and makes the gas pedal feel unresponsive.
2. Lower RPM Range:
Eco Mode keeps the engine running at lower RPMs for better efficiency. This can result in slower acceleration, particularly when you need a burst of power.
3. Cylinder Deactivation:
The engine might deactivate cylinders to save fuel, which can cause a noticeable drop in power during light acceleration.
How to Restore Acceleration Performance
1. Switch to Sport Mode:
If your Grand Cherokee has a Sport Mode, try switching to it. Sport Mode sharpens throttle response, raises shift points, and disables some of Eco Mode’s efficiency measures, often improving acceleration immediately.
2. Turn Off Eco Mode:
Press the Eco button to disable the feature. You should notice the throttle feels more responsive and the engine revs more freely.
3. Check for Error Codes:
Use an OBD-II scanner to check for stored Diagnostic Trouble Codes (DTCs) related to the throttle system, sensors, or engine performance.
A faulty sensor — such as the throttle position sensor (TPS) or mass airflow sensor (MAF) — can worsen the sluggishness.
4. Inspect Throttle Body and Sensors:
Over time, the throttle body can get dirty, affecting airflow and response. Clean the throttle body with a suitable cleaner and inspect the TPS and MAF sensors. Replace any faulty components to restore proper throttle function.
5. Reset Adaptive Learning:
The Engine Control Module (ECM) adapts to driving habits over time. Performing an adaptive reset allows the ECM to relearn throttle behavior, which can improve responsiveness. This can be done using a scan tool or disconnecting the battery for 10–15 minutes.
3. Inconsistent Fuel Economy Results
Eco Mode Not Improving Fuel Efficiency as Expected
One of the main reasons Jeep Grand Cherokee drivers use Eco Mode is to save on fuel. However, if your gas mileage isn’t improving or worsening, you’re not alone.
Many drivers of 2014 and newer WK2 models find that Eco Mode doesn’t consistently deliver on its promise. This can be irritating, especially if you’re dealing with sluggish performance and not seeing any real benefits at the pump.
Why This Happens
1. Mixed Driving Conditions:
Eco Mode is best for steady, moderate-speed driving. It may not provide noticeable savings if your daily commute involves frequent stops, quick acceleration, or heavy loads.
2. Adaptive Learning Issues:
The Engine Control Module (ECM) adjusts to your driving style over time. Eco Mode might not function effectively if it has “learned” inefficient habits or incorrect patterns.
3. Short Trips:
If you often take short drives where the engine doesn’t fully warm up, Eco Mode won’t have time to optimize efficiency. Cold engines burn more fuel, regardless of mode.
4. Engine Load Demands:
Towing, carrying heavy cargo, or driving on hilly terrain forces the engine to work harder, which can negate any fuel savings Eco Mode is designed to provide.
How to Improve Fuel Economy in Eco Mode
1. Check for Software Updates:
Visit your dealer or use an OBD-II scanner to see if your ECM software is current. Jeep occasionally releases updates that improve Eco Mode’s efficiency.
2. Reset Adaptive Learning:
Performing an adaptive reset clears the ECM’s learned behaviors, allowing it to re-learn optimal driving patterns. This can often lead to better fuel efficiency. You can reset the system with a scan tool or disconnect the battery for 10–15 minutes.
3. Drive Steadily:
Eco Mode is most effective with smooth, gradual acceleration and consistent speeds. Avoid abrupt stops and quick starts.
4. Check Tire Pressure:
Under-inflated tires can significantly impact fuel economy. Ensure your tires are inflated to the recommended pressure in your owner’s manual or the driver’s door frame.
5. Regular Maintenance:
Ensure your vehicle is in good shape. Clean air filters, healthy spark plugs, and proper fluid levels improve fuel efficiency.
When to Disable Eco Mode
Eco Mode might do more harm than good if you’re in heavy traffic, towing, or driving through hilly areas. Turning it off can improve performance and fuel economy by preventing the engine from straining.
An inconsistent fuel economy can be disappointing, but you can help Eco Mode work as it should with a few adjustments. And if all else fails, knowing when to turn it off can save you from unnecessary frustration.
4. Eco Mode Activation/Deactivation Failures
Eco Mode Button Not Responding or Eco Indicator Not Displaying
If you’re pressing the Eco button in your 2014–2021 Jeep Grand Cherokee and nothing happens, it could point to an issue with the button itself, wiring, or the Body Control Module (BCM).
These activation failures can prevent Eco Mode from engaging or displaying on the dashboard, making it difficult to enjoy the intended fuel-saving benefits.
Causes
1. Faulty Eco Mode Button or Switch Panel:
The Eco Mode button can wear out from frequent use, or the entire switch panel may fail due to internal faults.
2. Loose or Damaged Wiring Harness:
Vibrations, previous repairs, or corrosion can loosen or damage the wiring behind the Eco button, preventing it from sending the correct signal.
3. Blown Fuse or Relay:
A fuse related to the Eco Mode circuit may blow, cutting power to the button or indicator light.
4. Body Control Module (BCM) Glitch:
Software issues in the BCM can prevent Eco Mode from engaging, even when the button and wiring are in good shape.
Troubleshooting and Solutions
1. Check the Eco Mode Button:
Diagnosis: Press the button and listen for a soft click. If it feels unresponsive or stuck, the internal contacts may be worn.
Fix: Replace the Eco button or the entire switch panel. A new panel typically costs $50–$100 and can be installed by prying off the old one and plugging in the replacement.
2. Inspect the Wiring Connections:
Diagnosis: Remove the switch panel using a trim tool and check the wiring harness for loose connections, frayed wires, or corrosion.
Fix: Reseat the connector firmly and clean any corrosion with an electrical contact cleaner. Repair any damaged wires with heat-shrink tubing or replace the affected section of the harness.
3. Check Fuses and Relays:
Diagnosis: Refer to the owner’s manual to locate the Eco Mode fuse, usually found in the interior fuse box or the Power Distribution Center (PDC) under the hood. Look for a blown fuse (often 10A or 15A).
Fix: Replace the blown fuse with one of the same amperage. If the fuse blows again, there might be a more serious electrical problem that requires professional help.
4. Reset the BCM:
Diagnosis: Disconnect the battery for 10–15 minutes to clear any temporary glitches in the BCM. Reconnect the battery and try activating Eco Mode again.
Fix: If resetting doesn’t work, a dealership may need to reflash or update the BCM software. This service typically costs $150–$300.
5. Scan for Fault Codes:
Diagnosis: Use an OBD-II scanner to check for BCM-related fault codes like B10F0 (Eco Mode Switch Circuit Fault) or U0140 (Lost Communication with BCM).
Fix: If the BCM shows signs of failure, replacement might be necessary. This can cost $500–$700, including programming and labor.
5. Drivetrain Vibrations or Noises in Eco Mode
Unusual Vibration at Certain Speeds
If you’re noticing odd vibrations or droning noises while driving your 2014–2021 Jeep Grand Cherokee in Eco Mode, you’re not imagining it.
These vibrations often appear at low RPMs or specific speeds and can make your ride feel less refined. This issue is typically related to cylinder deactivation, transmission behavior, or worn drivetrain components amplified by Eco Mode’s efficiency settings.
Causes
1. Cylinder Deactivation (MDS System):
In Eco Mode, the engine may deactivate cylinders to save fuel, creating a subtle vibration or droning noise when the engine switches between 4-cylinder and 8-cylinder operation.
2. Transmission Holding Gears Longer:
Eco Mode adjusts shift points to keep the engine at lower RPMs. This can cause the transmission to hold gears longer, leading to resonance or mild vibrations at certain speeds.
3. Worn Engine or Transmission Mounts:
Engine and transmission mounts are designed to absorb vibrations. When these mounts wear out, vibrations can become more noticeable, especially at low RPMs where the engine operates in Eco Mode.
Troubleshooting and Solutions
1. Monitor Cylinder Deactivation:
Diagnosis: Use a scan tool to monitor the Multi-Displacement System (MDS) and see if the vibrations coincide with cylinder deactivation. You may also notice the “Eco” indicator light up when the system activates.
Fix: If the vibrations are disruptive, temporarily disable Eco Mode by pressing the Eco button. This prevents cylinder deactivation and often smooths out the ride.
2. Check Engine and Transmission Mounts:
Diagnosis: Inspect the engine and transmission mounts for cracks, wear, or excessive movement. Worn mounts often cause a thudding noise or increased vibrations, especially when shifting gears.
Fix: Replace any damaged mounts. New mounts can significantly reduce vibrations and restore a smoother driving experience.
3. Transmission Fluid Check:
Diagnosis: Low or degraded transmission fluid can lead to improper torque converter function, increasing vibrations. Check the transmission fluid level and condition.
Fix: Top off or replace the transmission fluid with the recommended type (typically ATF+4 for the Grand Cherokee).
4. Adaptive Transmission Reset:
Diagnosis: The transmission adapts to your driving style over time. If it has “learned” inefficient patterns, it may cause rough shifts or vibrations.
Fix: Perform a transmission reset using a scan tool or by disconnecting the battery for 10–15 minutes. This allows the transmission to relearn optimal shift points.
5. Inspect Driveshaft and U-Joints:
Diagnosis: Check the driveshaft and universal joints for signs of wear, looseness, or damage. Worn U-joints can create vibrations amplified in Eco Mode due to lower RPM operation.
Fix: Replace worn U-joints or have the driveshaft balanced to eliminate vibrations.
Need More Help?
While many Eco Mode issues in your Jeep Grand Cherokee can be solved with basic troubleshooting, some problems may need professional tools and expertise.
If you’ve tried these fixes and your vehicle still isn’t performing well, visiting a trusted mechanic or dealership is a good idea. They can perform advanced diagnostics and ensure your Grand Cherokee gets back to running smoothly.
Conclusion
Eco Mode in your Jeep Grand Cherokee is meant to boost fuel efficiency, but it can sometimes cause issues like jerky shifts, sluggish acceleration, inconsistent fuel savings, and unusual vibrations.
Luckily, most of these problems can be fixed with practical solutions—whether that’s disabling Eco Mode, updating software, or replacing worn parts like mounts or faulty switches.
Knowing what causes these issues can help you fix them quickly and prevent more significant headaches later. Whether you prefer to troubleshoot on your own or rely on a mechanic, getting Eco Mode to work smoothly lets you enjoy better fuel efficiency without losing performance.
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