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Antuan Goodwin/CNET

NHTSA investigates Ford F-150 for sudden brake failure

That's probably not very fun to experience on a pickup truck.

This only affects trucks with the 3.5-liter EcoBoost V6, not the smaller V6 or larger V8 engines.

Antuan Goodwin/Roadshow

Tuesday, I reported on two new federal investigations into Ford vehicles for two separate issues. But because all good things come in threes, the National Highway Traffic Safety Administration is also looking into an issue with Ford F-150s and brake failure.

NHTSA opened an investigation into certain 2015 and 2016 Ford F-150 trucks equipped with the automaker's 3.5-liter, turbocharged V6 engine. The feds received 25 complaints of sudden brake failure -- as in, the brake pedal goes to the floor and, on 2015 models only, warning lamps may illuminate. Some of these complaints say the dealer blamed the issue on a brake master cylinder failure.

There's some precedence here. Earlier this year, Ford recalled 2013 and 2014 F-150s, also equipped with 3.5-liter V6 engines, for a similar issue. The automaker claimed the problem came from a brake master cylinder reservoir leaking into the brake booster. That caused both a loss of brake pressure and a "low brake fluid" light to illuminate.

NHTSA will investigate the issue and, if need be, compel Ford to issue yet another recall. Investigations are the first step after receiving a number of complaints, which is why it's important to submit issues like these to regulators. Ford may issue a voluntary recall before the feds make a decision, as well.