Why Your 2020 Expedition Has No Power (It's Probably the Airbag Module)

How to Fix No Power

Experiencing a sudden loss of power in your 2020 Ford Expedition can be alarming, but it's a problem with specific, documented causes from other owners. This guide is built entirely from real-world experiences and solutions shared in owner forums. The primary culprit for a "no power" condition, as identified by multiple owners, is a failure within the airbag system that can trigger a fault in the vehicle's network, putting it into a protective "limp" mode or preventing it from starting altogether. As one owner seeking help for a similar issue asked, "Here's the issue I'm having - is yours similar?" (source). This interconnectedness of systems is key to diagnosing the problem.

Symptoms

The "no power" symptom can manifest in several distinct ways, all pointing to an electrical or network fault rather than a traditional mechanical failure. The most common report is a complete failure to start—you turn the key or press the start button, and nothing happens. No crank, no dash lights, or perhaps only a brief flicker before everything goes dead. This is often accompanied by other electronic gremlins, such as a non-functional radio, blank climate control screens, or unresponsive steering wheel buttons.

In other cases, the truck may start but immediately enter a severely reduced power state, often with a barrage of warning lights on the instrument cluster. You might see messages like "Drive Control Fault," "Pre-Collision Assist Not Available," or "Lane Keeping System Fault." The vehicle may feel sluggish, refuse to shift properly, or limit your speed. This is the truck's computer detecting a critical fault and limiting functionality to prevent damage or ensure safety. As one owner described troubleshooting a lane-keeping issue, "I understand it won't activate at lower speeds but a button on the dash? Not sure where it is and what it looks like..." (source), highlighting how one system's fault can be misinterpreted as another.

A less obvious but related symptom is intermittent power loss while driving. The engine may stutter or momentarily cut out, or you might experience a sudden drop in electrical power where accessories shut off and then come back. These episodes are frequently tied to network communication errors caused by a failing module, like the airbag control unit. Finally, owners have reported visible issues with sound-deadening material, which, while not directly causing no power, indicates broader build quality concerns. One owner noted, "I have noticed that the inside lamination, Soundscreen, is blistering, wrinkling and peeling." (source).

Most Likely Cause

Based on aggregated owner reports and discussions, the most likely cause of a "no power" condition in the 2020 Expedition is a fault within the Restraints Control Module (RCM), commonly referred to as the airbag control module. Modern vehicles use a high-speed network (CAN bus) where critical modules like the engine control unit (PCM), transmission control module, and RCM constantly communicate. If the RCM develops an internal fault, short circuit, or loses communication, it can send erroneous signals or drag down the entire network.

This network failure is interpreted by the Powertrain Control Module (PCM) as a critical vehicle fault. As a safety protocol, the PCM may inhibit engine starting or severely limit engine power to prevent unsafe operation. This explains why an airbag issue—a safety system—can manifest as a complete lack of drivetrain power. The problem is not with the engine itself but with the computer that controls it receiving bad data from a failed component elsewhere in the vehicle's network. This interconnected failure mode is a hallmark of modern, software-dependent trucks.

How to Diagnose

Diagnosing this issue requires a methodical approach, starting with the simplest checks and moving toward specialized tools. You will need a basic multimeter and, critically, an OBD-II scanner capable of reading manufacturer-specific codes and live data, not just generic P-codes. A low-cost code reader will not be sufficient; you need a scanner like those from Foxwell, Autel, or a high-end model that can access all modules.

Step 1: Check Battery and Connections. A weak or dead battery is the most common cause of all electrical issues. Use your multimeter to check the battery voltage. It should be at least 12.6 volts with the vehicle off. Check for corrosion on the terminals and ensure the connections are tight. Don't overlook the ground straps connecting the engine and chassis to the battery negative terminal; a poor ground can cause myriad issues.

Step 2: Scan for Codes in All Modules. Connect your advanced OBD-II scanner. Don't just read the "Engine" codes. Navigate the menu to scan all modules: Restraints (RCM), Body Control Module (BCM), Anti-lock Brakes (ABS), and the PCM. Look for any "U" codes (network communication codes) or "B" codes (body codes) related to the RCM. Codes like U0100 (Lost Communication with ECM/PCM) or B00XX codes related to airbag circuits are huge red flags. As one owner's experience suggests, the fix can be simple once the root cause is found: "Did you try pressing the button on the dash? Mine was accidentally pushed once and I thought something was wrong..." (source).

Step 3: Perform a Visual Inspection. With the vehicle's battery disconnected (negative terminal first, wait 15 minutes for airbag system capacitors to discharge), inspect the wiring under the driver and passenger seats. The RCM is often located under the center console or dash. Look for any pinched, frayed, or damaged wires, especially leading to the seats where side-impact airbags are located. Also, check for any signs of water intrusion on the floorboards, as liquid damage can short out modules.

Step 4: Check Module Communication. Using your scanner's live data or module communication test function, see if you can actively communicate with the RCM. If the scanner fails to establish a link with the RCM while other modules respond, the RCM itself is likely dead or disconnected. This step confirms the diagnosis before part replacement.

Step-by-Step Fix

Replacing a faulty Restraints Control Module is a serious repair due to the safety systems involved. If you are not completely confident, this is a job for a professional. If proceeding, understand this will require programming with a dealer-level tool like Ford's FDRS.

Step 1: Safety First - Disable the System. Park on a level surface, set the parking brake, and turn the ignition OFF. Disconnect the negative battery cable and tape it back to prevent accidental contact. Wait a minimum of 15 minutes for the backup power supply in the airbag system to fully discharge. This is non-negotiable to prevent accidental deployment.

Step 2: Locate the RCM. Consult a service manual for your specific model (Expedition vs. Expedition Max). Typically, the RCM is located under the center console, between the front seats. You will need to remove the center console trim pieces and possibly the storage bin to access it.

Step 3: Remove the Old Module. Once exposed, you will see the RCM—a rectangular metal box with one or two large wiring harness connectors. Carefully release the locking tabs on each connector and unplug them. Remove the mounting bolts that secure the RCM to the floorpan or bracket. Lift the module out.

Step 4: Install the New Module. Bolt the new RCM into place. Reconnect the wiring harness connectors, ensuring they click firmly and securely into place. Do not force them.

Step 5: Reconnect Battery and Program. Reconnect the negative battery cable. This is where the critical step happens. The new RCM is a blank module. You must use a professional diagnostic tool with Ford software (FDRS) to program the module to your Vehicle Identification Number (VIN). This process configures the module for your specific truck's equipment and calibrates the sensors. A generic code scanner cannot do this. After programming, the tool will guide you through clearing all fault codes.

Step 6: Verify Operation. Start the truck. The airbag warning light should illuminate for a few seconds as part of a system check and then turn off. If it stays on, the programming was unsuccessful. Use your scanner to clear any residual codes and verify that communication with the RCM is now active and error-free. Take a short test drive to ensure all power issues are resolved. As a relieved owner stated after a community-assisted fix, "You guys are THE BEST! Problem solved." (source).

Parts and Tools Needed

• Part: Restraints Control Module (RCM). You must get the correct part for your 2020 Expedition. The part number can be found on a sticker on the original module (e.g., LJ9Z-14B321-? ). Always purchase from a reputable dealer or auto parts supplier.
• Advanced OBD-II Scanner/Programmer: Such as a device running Ford's FDRS software, an Autel MaxiSys, or similar professional tool. This is for diagnosis AND mandatory programming.
• Basic Socket Set and Trim Removal Tools: For removing the center console and the RCM mounting bolts.
• Multimeter: For verifying battery and electrical connection health.
• Safety Glasses and Gloves: Always wear eye protection when working on airbag systems.

Real Owner Costs

The cost to fix this issue varies dramatically between DIY and professional repair, largely due to the programming requirement.

DIY Cost (If you have or rent the programming tool):

• New RCM Module: $300 - $600 (from online dealers or salvage yards. A salvage yard module would also require programming).
• FDRS License/Programming Tool Rental: $50 - $150 for a short-term license.
• Total DIY Estimate: $350 - $750.

Professional Repair Cost: This is the more common route. Independent shops with the right equipment are often preferred over dealers for complex jobs. As one owner advised when seeking a major repair, "This is at an independent, I wouldn't trust my local Ferd dealer to do an oil change without messing something up. I asked around various local Indies, these guys, who I already respected, told me they've done this job a half dozen times already..." (source).

• Part (RCM): $400 - $700
• Labor (Diagnosis, Replacement, Programming): 2-3 hours at $120-$180/hour.
• Total Professional Estimate: $800 - $1,500.

For context, other common repairs on high-mileage 2020 Expeditions, as noted by owners, include wheel hubs. "Another had to do wheel hubs at around 90k miles which isn't crazy for a heavy SUV anyhow." (source).

Prevention

Preventing an RCM failure is difficult as it's often an internal electronic fault. However, you can minimize risk by protecting the vehicle's electrical system. Avoid aftermarket electrical modifications (like poorly installed stereos, lights, or trackers) that could introduce voltage spikes or network interference. Keep the interior dry and address any water leaks from sunroof drains or windshields immediately to prevent corrosion in the footwells where wiring runs. Finally, maintain your battery health; a weak battery that causes low-voltage conditions during cranking can stress all electronic modules, potentially leading to premature failure.

What Owners Say

Real experiences from FORD owners:

Success Stories

"It worked fine for the first half of the highway trip (vibrated and nudged me back into my lane). I understand it won't activate at lower speeds but a button on the dash?" — Michael A (source)

"I used the YouTube video with the two keys. Worked." — Cyclone (source)

Owner Experiences

"Idk what year the expedition is but for the most part, everyone I know who has one (only 3 people but still) loves it. One guy bought a 2020 and has put 100k miles on it and only done fluid, brakes, and tires to this point." — dgroeneveld9 (source)

"One guy bought a 2020 and has put 100k miles on it and only done fluid, brakes, and tires to this point. Another had to do wheel hubs at around 90k miles which isn't crazy for a heavy SUV anyhow." — dgroeneveld9 (source)

"Here's the issue I'm having - is yours similar? https://www.reddit.com/r/fordexpedition/comments/1oe9bpg/2020_ford_expedition_max_drive_control_fault/" — ErikGoBlue (source)

Pro Tips from Owners

💡 "You should always be respectful to a local communities when out in the wild. We drive far enough for trails and don't want to have to drive even further just because of stupidity, inconsideration, and just lack of respect that some may cause." — tacoma16 (source)

FAQ

Q: Can I drive my Expedition if it has a "Drive Control Fault" or no power? A: No, you should not drive it. These faults often put the vehicle in a limp mode with severely reduced power and disabled safety systems (like airbags and collision warnings). Driving in this state is unsafe and could strand you. Have it towed to a repair facility.

Q: Is a faulty airbag module a common issue on the 2020 Expedition? A: While not as common as routine maintenance items, it is a known failure point documented in owner forums. The complexity of the electrical network in this generation makes it susceptible to module failures that have cascading effects, making it a notable issue when it occurs.

Q: DIY vs mechanic - what's recommended for this fix? A: This is strongly recommended for a professional mechanic, specifically an independent shop experienced with Ford network diagnostics. The mandatory programming step requires expensive, specialized software. Unless you are an advanced DIYer with access to FDRS, the risk of incorrect installation or programming is high and can lead to inoperative airbags—a critical safety failure.

Q: Will disconnecting the battery reset the airbag light if the module is bad? A: No. If the RCM has an internal fault, disconnecting the battery will not fix it. The fault code will immediately return when the system performs its self-check upon reconnection. This is a hardware failure that requires part replacement.

Q: How long does it take to fix a no-power issue caused by the RCM? A: For a professional, the physical replacement takes about 1-1.5 hours. The majority of the time is spent on diagnosis and, most importantly, programming the new module. Total shop time is typically 2-3 hours from diagnosis to completion.

Q: Can a bad battery cause symptoms that look like a bad RCM? A: Absolutely. A weak or dying battery is the #1 cause of strange electrical gremlins and network communication faults in modern vehicles. Always rule out the battery and charging system with a multimeter before condemning an expensive module. Low voltage can make modules behave erratically.