2020 Ford Mustang: engine overheating

Filed Aug 20, 2026 · Engine, Fuel system · AZ

2020 Ford Mustang with the 2.3L EcoBoost engine. The vehicle has a documented history of coolant loss with no visible external leak, consistent with the known coolant-intrusion defect in Ford's 2.3L EcoBoost engines where coolant leaks internally into the cylinders. The vehicle previously threw a cylinder misfire code (P0301) and now shows a crankshaft/camshaft timing correlation fault (P0017). A scan tool confirmed the exhaust camshaft is approximately 18–19 degrees out of correlation. A new variable valve timing oil control solenoid was installed and did NOT resolve the fault, confirming the problem is mechanical — a worn/stretched timing chain. This wear is consistent with the oil dilution and contamination caused by internal coolant intrusion. The problem has been confirmed by an independent service center via scan data. The vehicle is available for inspection. Warning symptoms included the check engine light, a loud rattle on cold startup, and occasional hard/no-start conditions. This is a safety concern because internal coolant loss can cause overheating, cylinder head cracking, and potential engine failure or fire while driving. Repair cost quoted at approximately $2,000. Mileage approximately 54,400.

Filed Nov 7, 2024 · Engine · 86,000 miles · DE

The contact owns a 2020 Ford Mustang. The contact stated while driving 25 MPH, the check engine warning light illuminated. The contact stated that the engine overheated while driving. The contact was able to pull over and the vehicle was towed to the local dealer to be diagnosed. The contact was informed that there was coolant in the combustion chamber, engine block, and cylinder head, and the low-pressure fuel pump had failed. The dealer recommended an engine replacement. The vehicle was not repaired. The vehicle was taken to an independent mechanic who replaced the head gasket, but the failure recurred. The manufacturer was contacted and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 86,000.

Filed Sep 9, 2024 · Engine · 59,000 miles · FL

The contact owns a 2020 Ford Mustang. The contact stated that the engine overheated while driving at various speeds with the temperature gauge showing that the engine was hot(H). The contact stated that the vehicle hesitated while depressing the accelerator pedal with an engine misfire alert on the Ford App. The vehicle was taken to a dealer where a pressurized test was performed; the test showed no defect with the engine. The contact then took the vehicle to an independent mechanic where the spark plugs, and cabin air filter were replaced, and the fuel system was cleaned. The check engine warning light illuminated soon after the repair. The vehicle was taken back to the dealer where it remained unrepaired. The manufacturer was notified of the failure and a case was filed. The failure mileage was approximately 59,000.

Filed Mar 15, 2024 · Engine · 63,000 miles · NC

The contact owns a 2020 Ford Mustang. The contact stated that while driving at 15 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The check engine warning light illuminated, and the vehicle was misfiring. Additionally, the vehicle was shaking, and the contact pulled over to the shoulder of the road. The contact turned the vehicle off and restarted the vehicle. The vehicle was driven to the residence. The contact stated that the failure was persistent. The vehicle was taken to the dealer where it was diagnosed with coolant leak into the cylinders and the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and advised the contact to report the failure to the federal safety agency Hotline. The failure mileage was approximately 63,000.

Filed Sep 15, 2020 · Acceleration, Driver assistance · 8,000 miles · CA

The actual getrag defective and faulty manual transmission on ford mustang 2020 still causing serious personal safety issues nowadays. In manual transmission vehicles, downshifting gears on a reliable, effective and efficient transmission 'part', it's a serious and determining factor at the moment the driver needs to slow down safely or even stop the vehicle, especially on longer downhill roads so brake overheating and possible failure of them can be avoided or in the eventual case of towing a load... Shifting gears at also important when increasing speed is required or even expected, like at the moment a car incorporates or merge in to a freeway from the ramp and it's required to match the ongoing and specially, the oncoming vehicles or traffic, this risk increases if the oncoming vehicle is a loaded trailer to set 1 example. Being able to efficiently increase speed if 'slowing down' option is not the advisable in the particular circumstances; is actually a determining factor at the moment of avoid a lateral deadly collision or in the best of the cases an injury. This defective transmission had situated me in this kind of risky situations of collision and deadly crashes, that fortunately were managed to be avoided. Ford it's actually facing on this year (2020) a 'class action' (case 2:20-cv-11310-ljm-drg ecf no.1) for refusing us the customers, to get replaced, repaired, and totally solution and 'cure' the problem with this dangerous and unreliable transmission part. Unlike! Ford refuses to acknowledge their responsibility and trying to scam us and even charge us expensive amounts for repairs, claiming that 'it's a wear and tear' issue or 'aggressive driving', 'drivers performing burnouts' etc. Trying to scam us with even a 1 month of using, brand new cars and with their warranty, claiming that it's due to the clutch and clutch is the only thing they don't cover.