2009 Mercury Mariner: ABS light or ABS activating

Filed Dec 4, 2022 · Brakes · OH

While driving vehicle brakes all of sudden go to the floor, no pedal response. This has happened a couple of times without warning. Once when I was approaching an intersection and light changed. My brakes all of the sudden went to the floor and I had to downshift and cut my wheels toward the curb to stop from crashing. Then a couple days later attempting to get it to mechanic it was fine and pumped properly. I wrote it off as a fluke. Then a few months later it happened again. My mechanic can't seem to find the issue and has charged me for new brakes, new master cylinder, new brake line, and another part for the abs power assistant. My car still continues to have this brake malfunction on and off. Somebody is going to end up getting hurt. This obviously is some kind of part defect. Please help!

Filed Jan 19, 2021 · Brakes · 120,000 miles · MI

The brake pedal goes straight to the floor leaves you with no brakes. This is due to the ABS hydraulic control module failing same as other ones in ford and mercury's being recalled. This is terrible and dangerous and they refuse to help even though thousands of customers with mariners and escapes are having identical problems. Does multiple people have to die before they recall these? This happened while on the highway at 65mph. Terrible and dangerous.

Filed Oct 26, 2020 · Brakes · 165,000 miles · IN

When using the brakes there's a loss of about half of the brake pedal, and most likely the ABS system. The part retails for $1,747.32. The problem from talking to mechanics and searching is apparently sticking valve(s) which in turn makes the brake fluid by-pass half of the system. In other words you only have the use of part of the brake system. Our car has 170k miles but that's ~ 90% highway miles, we bought it ~6yrs ago with 15k miles, which means the brakes don't get that much use. The rear shoes were just replaced for the 1st time @ 170k and the front pads have been done once. Ford cares so much about the lives of people driving their cars that they continue to sell the same part (modulator valve - ford (9l8z-2c346-c)) without any engineering changes/updates, even though this is a common problem across car lines and even trucks. They have issued a recall, #19s54 for select 2006-10 ford fusion, mercury milan and lincoln mkz vehicles that exhibit the same issue, "a normally closed valve inside the hydraulic control unit may stick open, which could result in extended brake pedal travel, potentially increasing the risk of a crash.". An interesting point in the recall is this: "the system will be pressure-flushed with dot 4 brake fluid and the dot 3 reservoir cap will be replaced with a new dot 4 cap." our vehicle has a dot3 cap, is dot3 what causes the problem with "stuck or slow-responding valves" per recall, and dot4 keeps valves from sticking or becoming slow acting because of the viscosity difference between the 2? From amsoil "dot 3 is the most common type used in cars and trucks today. Dot 4, however, is gaining popularity due to widespread use of anti-lock braking systems and traction control, which benefit from dot 4 fluid?s lower viscosity." this: "as of 2006, most cars produced in the u.s. Use dot 4 brake fluid." except for ford apparently.

Filed Aug 16, 2020 · Brakes · 150,000 miles · KS

After ABS activated brake padel became soft. My vehicle has a simlar problem expained under ''safety recall 19s54 ' anti-lock brake system hydraulic control unit valve function''. Eventhough ford recalled several unites, my VIN did not list under the recalled units.

Filed Nov 26, 2018 · Brakes, Electrical · 98,291 miles · NM

While traveling approximately 35 MPH, driving in a straight line on a city street in traffic, the ABS abruptly applied the brakes - hard! The ABS light came on and a "check brake system" warning message was displayed. Also, the electrical system shut down and the engine lost power. After about 5 seconds, power was restored and vehicle was able to proceed. This occurred approximately 8 times over a two mile distance. During the last 4 times, the engine died, lost power completely, and needed to be turned off and restarted to continue. This failure was a dangerous safety hazard. Vehicle was towed to albuquerque lincoln volvo. The problem was diagnosed as a failed ABS module, 9l8z. The dealer replaced the ABS module with a faultly module. A second ABS module was installed and the vehicle was deemed repaired. The dealer did not return the defective part for analysis.