2018 Ford Explorer: check engine light

Filed Oct 5, 2026 · Engine · FL

My vehhicle has been tested by ford service center and found to be affected by the factory defect that allows coolant to leak causing a catastrophic engine failure where the only remedy is a new engine block. My vehicle has 69919 miles. The problem was recognized when the vehicle bagan to misfire causing the check engine light to come on resulting in expensive diagnostics. Ford has put my safety as well as the safety of my passengers in jeopardy by knowing but not disclosing this factory defect that can become catastrophic at any given time. Service advisories were sent out to employees but no notification to customers.

Filed Jul 9, 2026 · Engine · 112,000 miles · MA

The contact owns a 2018 Ford Explorer. The contact stated that while driving at approximately 30 MPH, the check engine warning light illuminated. The vehicle was driven to the residence and then to an independent mechanic shop, where a full diagnostic inspection was not performed; however, the mechanic suspected that coolant bubbled internally and the contact was informed that the head gasket might need to be replaced. The mechanic was unable to disassemble the engine for further inspection. The vehicle was then taken to a dealer, who diagnosed that the water pump needed to be replaced, and the vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 112,000.

Filed Apr 17, 2026 · Engine · UT

At 89k miles, my engine has failed, due to coolant intrusion, according to Ken Garff Ford Dealership in St. George, UT. I started having issues with rough start and timing miss and engine light came on. I immediately took it to Dealership and they did two repairs (tune-up) and subsequent gasket change because they said oil was getting into my spark plugs. It did not resolve the issue, took it straight back and now they're telling me I need a new engine. This comes 2 years after I had to pay $7k for a new transmission at only 60k miles. This is wrong and not OK that I am having to deal with this. I don't have $12k laying around for a new engine on a vehicle that shouldn't be having all these issues!

Filed Feb 25, 2026 · Engine · TX

Upon startup rough idle and check engine light came on. Mechanic confirmed cylinder head thinning causing fluid leak into first cylinder. A mechanical note verifies but Ford won't issue a recall. Apparently Ford has know this for years with Ecoboost engines. I don't want to become a victim of vehicle dying in the middle of traffic. Have seen several complaints from Ford owners with no fixes by Ford.

Filed Feb 18, 2026 · Engine · 118,000 miles · FL

The contact owns a 2018 Ford Explorer. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. Prior to the failure, when the vehicle was started, there was an abnormal sound coming from the engine. After several minutes, the sound ceased. The vehicle was taken to an independent mechanic who diagnosed the vehicle with a misfire in cylinder #3. The contact was informed that the spark plug was stuck, and the independent mechanic was unable to remove the spark plug. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken back to the independent mechanic. The vehicle was diagnosed with a misfire in cylinder #3, and the spark plug and ignition coil were replaced. The contact was unsure if the stuck spark plug was removed the second time the vehicle was repaired. Most recently, the contact noticed that while the vehicle was in park(P) and left running, the vehicle was idling roughly. The message "Engine Coolant Over Temperature" was intermittently displayed. The contact pulled over to the side of the road, left the vehicle running, exited the vehicle, opened the hood, and there was no smoke or steam present. The contact returned to the vehicle and noticed that the temperature gauge was indicating that the engine was HOT. The contact drove back to the residence. The vehicle was taken to the dealer, where it was diagnosed with coolant intrusion in cylinders #1, #2, and #4. The contact was informed that the coolant reservoir was empty, that the spark plug in cylinder #3 was stuck, and that the engine needed to be replaced. The vehicle was not repaired. The contact took the vehicle to an independent mechanic for a second opinion, who diagnosed coolant intrusion in cylinders #1, #2, and #4, and that the spark plug was stuck in cylinder #3. The vehicle was not repaired due to the cost. The dealer notified the manufacturer of the failure. The failure mileage was approximately 118,000.

Filed Jan 27, 2026 · Engine · 162,000 miles · NJ

The contact owns a 2018 Ford Explorer. The contact stated that after the vehicle was idling at a traffic stop, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The check engine warning light illuminated. The contact pulled over to the side of the road and turned off the vehicle. The vehicle was restarted; however, the vehicle stalled after driving several minutes. The vehicle was towed to an independent mechanic who diagnosed the vehicle with engine failure and determined that the engine needed to be replaced. The vehicle was not repaired due to the cost. The vehicle remained with the independent mechanic unrepaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 162,000.

Filed Nov 21, 2025 · Brakes, Electrical · MO

Purchased 5 years ago aprox 100k miles.kept oil changed regularly. Of course parts kept coming off, monk safety clips etc. It's a dime store matcbox wannabe. Then the abs and engine light came on. The computer was acting up and it would do crazy things. Lock and unlock, go into that slow drive as i was pulling into a road. Etc. These would self correct, all but the abs in a matter of minutes. Oh i did have it checked. All that came up was right wheel speed sensor. I paid to have it fixed. Ford dealer told me his news, new sensor bad news still says it's bad. I was moving to another state. Stranger things kept happening. None could find out what was wrong. It started back firing so new plugs and coils. The shop told me after that it still had issues and while no code it was the transmission. It started to violently shake going 70mph. Scared me to death. I sold it and now car shopping. Never Ford again! I have always trusted them but they have compromised on quality, safety and customer loyalty.

Filed Oct 22, 2025 · Engine · OH

Another timing chain failure on highway with engine stopping on road. This should be a recall!!!!! Only 101,300 miles on engine. No warnings no check engine lights until after failure.

Filed Aug 30, 2025 · Engine · TX

The internal water pump system on the EcoBoost engine in the 2018 Ford Explorer failed after 7 years and only 63,880 miles. The vehicle was taken into the shop multiple times when the check engine light came on and the defect was not located until the vehicle failed. Due to the design, it is not easily fixed and cost an outrageous amount of money to fix for a vehicle with less than 100,000 miles. This is a safety risk because if this is a common issue, which it is, and the engine fails while driving it, the driver is not able to get to a safe area to address damages and is left stranded. There are numerous complaints regarding the design flaw of having the water pump inside the engine. The manufacturer refuses to address the flaw. The check engine light came on and was taken in and wrongly diagnosed each time until the engine failed.

Filed Aug 8, 2025 · Electrical · MO

I previously reported a battery 'explosion' in this 2018 Ford Explorer with ODI 11678705 due to my concern for a potentially highly dangerous situation for my grandchildren who were riding with me. And myself. An unpleasant smell intermittently followed this car that morning July 10 Upon opening the hood it was evident that battery acid had leaked out of the battery and 'exploded' covering most visible engine parts. Entire time of drive there was no 'alert' showing up on my dashboard July 11 car would not start to take to Ford dealership. AAA towed car with AAA driver remarking 'looks like your battery exploded!' Engine compartment cleaned by service, battery replaced July 12 July 18 engine light came on. Ford dealership contacted, no service appointment available until Aug 20. Advised by Ford service to take short trips only, and stop driving if engine light started flashing. I restricted my driving. July 27 started car for trip to church. Loud banging coming from under hood. Stopped driving. Car towed July 28 to Ford dealership repair. Car was not into service dept until Aug. 5. Aug 6, Ford service decided to get input from a more experienced technician to diagnose the problem with 2018 Ford explorer Aug 7, Ford service escalated case to Ford corporate for engineering help with identifying 'electrical' problem with my car. Ford service rep stated 'you car is throwing a code not typically seen with explorers) How can be safe if these my car had a battery issues mechanics freely admit they have not seen before. And now trained Ford mechanics cannot even find or fix the broken link that truly may be responsible for back to back engine failures? Dealer has finally been able to provide a rental. This car has been maintained according to factory recommendations at Sunset Ford and Bommarito Ford St. Loui

Filed Jul 28, 2025 · Engine · AR

Engine light turning off and on. Engine overheating light on. Told by Ford dealership that I need engine replacement.

Filed Jun 25, 2025 · Engine · CA

On Thursday, June 14, 2025, the check engine light illuminated on my 2018 Ford Explorer, which has fewer than 75,000 miles. I promptly contacted my trusted local mechanic, Bananno Automotive, to schedule an oil change and requested that they also inspect and diagnose the cause of the warning light. During their inspection, they performed a diagnostic scan and identified stored engine code P0430 – Catalyst System Efficiency Below Threshold (Bank 2), which corresponds to the catalytic converter on the left side of the radiator. Concerned that delaying the repair could lead to increased emissions and potential damage to the engine, I authorized the necessary repairs. All work was completed by June 23, 2025. It was only after the repairs were finalized that I reviewed the Ford Warranty Guide and discovered that this issue is, in fact, covered under warranty. Unfortunately, Ford has denied reimbursement solely because the repairs were not performed at a Ford dealership. This is deeply disappointing, especially considering the repair cost exceeded $1,800, and no alternative solution or support has been offered. My intention in sharing this is to ensure that other Ford owners are not similarly affected by this type of parts failure and warranty denial.