2020 Ford Explorer: false forward collision warnings

Filed Oct 21, 2026 · Driver assistance, Transmission · KS

Front axle disconnect actuator on my 2020 Ford Explorer 2.3L AWD is failing. The vehicle stores DTC C0631-7E (Actuator Stuck On) and previously stored C0631-7F (Actuator Stuck Off). When the fault is active, the wrench light comes on and the following safety systems are disabled: AdvanceTrac, Pre-Collision Assist, and Hill Start Assist. Ford has issued TSB 25-2373 / 25-2568 for this exact issue requiring replacement of the intermediate shaft with revised part N1MZ-3A329-A and AWD module reprogramming, but there is no recall. Owners must pay for the repair. The problem is intermittent and has been confirmed with a scan tool. This is a known design defect, not normal wear, and it affects safety systems.

Filed Sep 15, 2026 · Driver assistance, Electrical · NJ

I own a 2020 Ford Explorer XLT AWD, VIN 1FMSK8DH6LGA35229. While driving, my vehicle displayed “4WD Fault – Service Required” along with the powertrain wrench warning. I then became unable to select/change drive modes. Pre-Collision Assist became unavailable, I experienced Lane Keeping/Lane Assist problems, and additional stability/traction warnings appeared. A professional diagnostic scan found AWD codes C0631:7E-68 and C0631:7F-6C related to the front axle disconnect actuator. The ABS module also stored U0102 (Lost Communication With Transfer Case Control Module) and U0155 (Lost Communication With Instrument Panel Cluster). My mechanic diagnosed failure of the front axle disconnect actuator/intermediate-shaft system. The repair requires removal of the original disconnect system and installation of Ford’s revised intermediate shaft/axle components, replacement of the vent/breather hose, and AWD programming. I was quoted approximately $1,337. The mechanic will then determine whether the transfer case/AWD control module also requires replacement, which would cost approximately $828 additional. Ford has issued TSB 25-2373, superseding TSB 23-2174, for certain 2020-2021 Explorer AWD vehicles. The bulletin specifically identifies C0631 and/or C00A6 and the front axle disconnect actuator/intermediate shaft and directs replacement with a revised intermediate shaft. I am concerned this is a safety defect because the failure resulted in AWD/drive-mode malfunction while multiple driver-assistance systems became unavailable. I request that the federal safety agency investigate this known failure and determine whether a safety recall is warranted.

Filed Aug 21, 2026 · Transmission · AZ

Illuminated powertrain malfunction (wrench) indicator with DTCs C00A6 and C0631, caused by failure of the front axle disconnect actuator/intermediate shaft on an AWD 2020 Explorer at 46,821 miles. The vehicle displayed the wrench light along with "Service AdvanceTrac," "4WD Fault," "Hill Start Assist Not Available," and "Pre-Collision Assist Not Available." Multiple driver-assistance and stability systems disabled themselves simultaneously, including AdvanceTrac stability control and pre-collision braking. Loss of stability control and automatic emergency braking without warning is a safety concern, particularly at highway speed. The fault was intermittent at first. The dealer had the vehicle five days and could not duplicate it. Within a week of getting it back the condition became nearly constant. The repair is Ford TSB 25-2568, which replaces the front axle disconnect actuator/intermediate shaft with a revised, non-disconnecting design and a new halfshaft. Ford has published this bulletin repeatedly since spring 2023 — 23-2114, then 23-2174 (July 2023), then 25-2373, then 25-2568 (January 2026) — for 2020-2021 Explorer and Aviator AWD vehicles built on or before 30-Aug-2021. Ford has redesigned the part and eliminated the disconnect feature entirely, but has issued no recall or customer satisfaction program. Because this vehicle is out of factory warranty by age at 46,821 miles, the roughly $2,500 repair fell to me. I request that the federal safety agency review whether a known design defect that disables stability control and pre-collision braking warrants a safety recall rather than a service bulletin.

Filed May 27, 2026 · Electrical, Transmission · NJ

I am filing a complaint regarding a recurring safety-related electrical and AWD defect in my 2020 Ford Explorer. My vehicle repeatedly displays the following warnings while driving: “4WD Fault Service Required” “Service AdvanceTrac” “Pre-Collision Assist Not Available” “Hill Start Assist Not Available” The issue began about a year ago occurring intermittently every few weeks and disappearing after restarting the vehicle. It has progressively worsened and now appears almost immediately after driving only a few feet. The defect affects multiple critical safety systems including AWD/4WD, traction/stability control, hill assist, and collision avoidance systems. I have contacted Ford multiple times. Ford only opens customer service cases but has not provided a permanent repair. Ford is aware this is a common issue with 2020 Explorers specifically, and later model years appear to have been corrected. Numerous owners report the exact same failures online. Ford has issued service information involving software reprogramming, module communication faults, and wiring harness issues, but only Ford dealerships can perform the required programming. This appears to be a widespread manufacturing or engineering defect and creates a serious safety concern while driving. Vehicle Information: 2020 Ford Explorer Mileage: Under 55,000 miles I respectfully request that the federal safety agency investigate this issue for a potential recall or mandatory corrective action.

Filed Apr 13, 2026 · Driver assistance, Electrical · OH

Three alerts appeared on my dash after starting my car. These alerts are “Pre-Collision Assist Not Available,” “Service AdvanceTrac,” and “4WD Fault Service Required.” This has been an ongoing issue with this vehicle which directly affects the safety of drivers. After discussing with other consumers, this system failure is happening more and more. While these alerts are displayed, the front end collision assist is completely nonfunctional, thus increasing the risk of an accident. The Advanced Traction Control System is also nonfunctional. Based on other consumers with the same experience, the only solution is to replace the AWD module.

Filed Nov 7, 2025 · Driver assistance, Transmission · TX

Powertrain malfunction/ Reduced power Bill start assist warning Pre-collision assist not available

Filed Oct 26, 2025 · Driver assistance, Electrical · CO

Ford ST 2020 just 37000 miles, the window from driver side can’t complete close when you try to roll up. When it all most close- it will automatically roll down. TPMS fails cause 4WD fault, ABS turn off and a lot of warning symbol turn on like pre-collision…etc. Dealer can’t fix and claim for client need to paid for 4WD program.

Filed Aug 27, 2025 · Transmission · ND

My got multiple warning messages while driving my 2020 Ford Explorer. My local repair shop ran test and determined it needs a new front axle disconnect actuator/shaft - TECHNICAL SERVICE BULLETIN 23-2174. Without this repair, several sensors are deactivated: 4WD, Hill Start Assist, Forward Collision Warning, Blind Spot system, pre-collision Assist and Service AdvanceTrac. With those functions disabled, it puts the driver/passengers at higher risk of collision - especially in the winter months. This repair is costing me over $2000. A vehicle with less than 70000 miles should not be having an issue like this, and Ford is award of the problem, yet have not issued a warranty extension or recall.

Filed Aug 21, 2025 · Driver assistance, Transmission · NY

issued started happening when I tried to get into my car and my keyfob was not working. then notice the number pad was working and was able to get into the vehicle. Once inside, vehicle did not want to start. I turn on and off the headlights and thats when the vehicle started. Once started, vehicle started showing orange warning messages. the following messages were shown: Pre-Collision Assist Not Available Hill Start Assist Not Available 4WD Fault Service Required Service AdvanceTrac See Manual with a wrench on it. There is also a wrench light on with the advance trac light on. This issue was diagnosed by Ford Scarsdale and they charge me $209 just for the diagnostic and stated that I need a new AWD Module plus performing TSB 23-2174. with a list of parts totaling $926.42 plus labor of $1,463. The labor seems a bit over price as I don't believe it will take 7 hours to fix this if we take the labor at $200/Hr. There were no prior messages prior to failure. Issue started happening around August 9th, 2025 where my car would start with no issues and after 10 minutes of driving, all the above messages would start showing. Now, messages show when car starts and dont go away. In addition, I have taken my vehicle to Ford Scarsdale on July 2, 2025 from front/read differential and transfer case fluid change and pinion seal change. In addition, on 03/27/2024, I took my vehicle since there was oil leak in the front axle and was repaired under warranty. Dealership should have suggested to do this TSB 23-2174 knowing this was a common issue and I was still under warranty

Filed Aug 14, 2025 · Driver assistance, Electrical · TX

While driving, vehicle gave Powertrain malfunction, downhill assist unavailable and Pre-collision warning system unavailable faults. The vehicle then came to a stop and would not move. Turning the ignition off and on allowed the vehicle to be safely parked in a nearby parking lot.

Filed Aug 5, 2025 · Driver assistance, Electrical · 70,000 miles · WA

The contact owns a 2020 Ford Explorer. The contact stated that while driving at an undisclosed speed, the transmission was shifting hard. While driving uphill, the transmission failed to properly shift into gear. The transmission was slow to respond while shifting gears. There were codes and warning lights related to the power train and pre-collision assist. Additionally, the powertrain, Hill Start Assist, and pre-collision warning lights were simultaneously activated and then deactivated. The TPMS warning illuminated and eventually turned off, and then became illuminated. The tire pressures were checked and were at proper inflation levels. The contact stated that the failure was possibly related to the federal safety agency Campaign Number: 25V239000 (Power Train). The contact called the manufacturer and discussed the related recall on the 2025 Ford Explorer and was referred to the federal safety agency Hotline to report the failure. The local dealer was contacted about the malfunction and informed the contact that the failure was a glitch. The vehicle was not diagnosed or repaired. The failure mileage was approximately 70,000.

Filed Jul 8, 2025 · Electrical, Engine · 89,156 miles · OH

The contact owns a 2020 Ford Explorer. The contact stated that while reversing, the vehicle stalled. The vehicle jolted forward while parking. The brakes were locking up. While driving 5 MPH, the steering wheel locked up. The 4-WD fault light was illuminated. The contact stated that the Pre-collision Assist, Hill Assist and Reverse messages were displayed. The contact stated that the failure was related to Technical Service Bulletin: 23-2174. The vehicle was taken to the local dealer, where it was diagnosed that the AWD actuator was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 89,156.