Tag Archives: auto safety

2020-2023 Ford Mustang No Low Brake Fluid Warning

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brake light warningSome Mustang cars made between 2020 and 2023 have a problem with their brake fluid level sensor. This sensor doesn’t activate a warning light when the brake fluid is low. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standards for light vehicle brake systems.

Ford became aware of the problem in August 2023 when an issue pertaining to 2020-2023 model year Mustang brake fluid level warning systems was brought into Ford’s Critical Concern Review Group (CCRG) for review. They discovered that the problem lies with the Body Control Module (BCM), a part that manages the brake fluid sensor. This BCM should turn on the brake warning light if there’s a problem. In Mustangs made from 2018 to 2023, the brake fluid sensor is directly connected to the BCM. However, in the 2020 Mustang, they switched to a different BCM design, called “Gen1m,” which incorrectly looks for a message from the brake fluid sensor over a network (CAN) instead of the direct connection.

After investigating, Ford confirmed that this problem only affects Mustangs from 2020 to 2023. They also verified that the 2024 Mustang doesn’t have this issue because the brake system and BCM are set up correctly. The Brake Development team tested Mustangs from 2019 to 2024 and found that the 2020 to 2023 models fail to meet the requirements for warning about low brake fluid. However, these vehicles meet all other brake system warning lamp requirements.

Ford initially didn’t run certification tests on the 2020 to 2023 Mustangs because they thought the brake system was the same as in the 2018 model. They didn’t know that the BCM was incorrectly configured to use a network message.

As of September 12, 2023, Ford received 123 warranty claims related to a brake fluid loss on these vehicles, but there were no reports of the brake fluid level sensor not working.

To fix the problem, Ford dealers will update the software in the body control module. They plan to send out initial letters in December 2023 to notify owners about the safety issue and will send second letters when the solution is available. This recall is identified by Ford as number 23C35, and the NHTSA campaign number is 23V-727.

Ford Mustang Mach E Battery Contactor Could Overheat

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Certain 2021-2022 Ford Mustang Mach-E cars might face a power problem due to an overheated high voltage battery contactor, potentially leading to an increased risk of accidents.

In June 2022, Ford’s Field Review Committee (FRC) gave the green light to a Field Service Action (FSA) named 22S41, specifically designed to tackle concerns regarding the overheating of the high voltage battery main contactor in select 2021-2022 Mustang Mach-E vehicles. To fix this issue, dealers updated the software for the Secondary On-Board Diagnostic Control Module (SOBDMC) and the Battery Energy Control Module (BECM). The enhanced SOBDMC software keeps an eye on the contactor’s temperature and smartly reduces the battery’s power output to prevent further damage. Meanwhile, the upgraded BECM software checks the contactor’s resistance to identify any damage, then it generates a diagnostic trouble code (DTC) and lowers the vehicle’s power to avoid more harm.

At the time of approving this FSA, Ford’s Critical Concern Review Group (CCRG) and Electrical Propulsion Engineering (EPE) teams found the software updates for BECM and SOBDMC to be a suitable way to minimize the safety risks linked to power loss. The software update, by monitoring contactor resistance, warns customers if the resistance exceeds a certain limit. Alongside the warning, the software reduces power to prevent further contactor damage and the associated power loss risk. Even with the reduced power, customers can safely accelerate to highway speeds. This approach was also reviewed with the National Highway Traffic Safety Administration (NHTSA).

In June 2022, Ford Motor Company decided to issue a safety recall (NHTSA Recall 22V-412) for 48,924 model year 2021-2022 Ford Mustang Mach-E vehicles produced between May 27, 2020, and May 24, 2022. This recall was prompted by concerns about high voltage battery contactors overheating, primarily due to direct current (DC) fast-charging and repeated full-throttle pedal events. This overheating could lead to arcing or deformation of the electrical contact surfaces. If this occurs, the contactor could either remain open or get welded shut. An overheated contactor that opens while driving may lead to an immediate loss of power without re-engagement.

Following consumer complaints, the Office of Defects Investigation (ODI) initiated a Recall Query (RQ) for 2021-2022 Ford Mach-E vehicles included in Recall 22V-412. These vehicles had previously received a remedy involving a Secondary On-Board Diagnostic Control Module (SOBDMC) software update to monitor contactor temperature and reduce battery power to protect the contactor, as well as a Battery Energy Control Module (BECM) software update to monitor contactor resistance and reduce vehicle power in case of an overheated contactor.

To address this issue, dealers will replace the high voltage battery junction box. This recall is identified by Ford as 23S56, and the corresponding NHTSA campaign number is 22V-687. Vehicles included in this recall that were previously repaired under recall 22V-412 will need to have the new remedy completed.

Nissan Ariya Inverter Software Problem

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Nissan North America, Inc. (Nissan) is reaching out to the owners of certain 2023 Ariya vehicles due to an issue with the inverter software. This problem may trigger the inverter to detect a short circuit, causing a shutdown of the EV system and a loss of drive power.

The Discovery of the Problem:

Nissan first became aware of this issue during a production trial involving an Ariya vehicle in January 2022. In this trial, the electric motor abruptly shut off shortly after the vehicle began moving at low speed. A diagnostic trouble code (DTC) revealed a short circuit inside the motor, although no actual damage to the motor or its components was observed. A deeper investigation into the problem found that in some rare instances, conductive fibers generated during the operation from the slip ring in the motor could lead to a momentary short circuit between the electrodes.

Understanding the Problem:

Nissan Ariya dashAccording to the defect report, the root cause of the issue lies in conductive fibrous shavings from the drive motors’ slip ring assembly. These shavings can occasionally cause a momentary short circuit between the two slip rings. When this occurs, the fibrous shavings are instantaneously burned out, causing no harm to any vehicle components. However, when the inverter detects a momentary over-current due to the short circuit, it reduces motor torque to protect the internal components of the controller. This leads to a loss of drive power, and an “EV System Off” message is displayed on the dashboard to alert the driver.

In the event of this issue occurring, the torque to the driven wheels is cut off. This continues until the fail-safe mode is released, which requires turning the vehicle off and then back on. An unexpected loss of motive power while driving at high speeds could potentially increase the risk of an accident.

Nissan’s Solution:

To address this safety concern, Nissan dealers will reprogram the inverter software to enhance the fail-safe protocols. This proactive measure aims to prevent such short circuits from impacting the driving experience and maintaining safety for the driver.

Recall Details:

Nissan has designated this recall as R23C6 and the National Highway Traffic Safety Administration (NHTSA) has assigned the campaign number 23V-657 to this recall.

2016 Mercedes-Benz C300 & GLC 300 Electronic Stability Problem

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Mercedes-Benz has determined that a small number of 2016 C300 and 2016 GLC 300 vehicles have an Electronic Stability Program (ESP) hydraulic control unit that may have been damaged during transport. Depending on the extent of the damage, specific ESP functions may be deactivated. Drivers will be alerted of a problem through a display message and warning lights on the dashboard, and may experience loss of electronic parking brake functions.

Those receiving notices will be asked to return to their dealerships to have the Electronic Stability Program (ESP) hydraulic control units replaced. For more information about the problem, owners are asked to contact MBUSA customer service at 1-800-367-6372. The NHTSA campaign number for this recall is 16V-603.

2016 RAM Trucks – Main Output Shaft Fracture

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Chrysler will be contacting the owners of certain 2016 RAM 3500, 4500 and 5500 trucks about a problem affecting their vehicles powertrain system. The transfer case main output shaft may have been manufactured misshapen, creating voids that could result in a shaft fracture. If the main output shaft fractures, the vehicle will lose motive power and the driver may be unable to shift into “PARK”.

Dealers will correct the problem by replacing the transfer case. For more information about the problem, owners are asked to contact Chrysler customer service at 1-800-853-1403. Chrysler’s number for this recall is S48 and the NHTSA campaign number is 16V-495.

2016 Chevrolet Malibu Airbag Safety Problem

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General Motors has decided that certain 2016 Chevrolet Malibu vehicles have side airbag modules that do not comply with Federal Motor Vehicle Safety Standards for side impact protection and will be asking owners to return to their dealerships for repairs. According to the defect report filed with the NHTSA, the welds that mount the front and rear side impact airbag inflators to the seat frame could fracture and separate during deployment, increasing the risk of injury to occupants. Continue reading →

GM Truck Brake Pedal Problem

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General Motors have announced a defect relating to motor vehicle safety exists in certain 2015-2016 Chevrolet and GMC trucks. According to reports filed with the NHTSA, the threads on the brake pedal pivot bolt may be too short to engage the locking feature of the nut. If the pedal loosens, the driver may not be able to stop the vehicle safely or the pedal could interfere with the accelerator. The driver may notice a change in brake pedal feel, the service engine soon light may illuminate, and/or the brake lights may stay on longer than expected. Continue reading →

2014-2016 Kia Soul Steering Problem

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Kia will be asking the owners of certain 2014-2016 Kia Soul and Soul EV vehicles to return to their dealerships to repair a problem affecting the steering system. According to reports filed with the NHTSA, the adhesive used to secure the steering pinion gear to the gear assembly may have insufficient strength. The pinion gear could separate from the assembly, resulting in loss of steering and an increased risk of an accident. Continue reading →