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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
P0556 Code
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<blockquote data-quote="Navigator55" data-source="post: 1995063" data-attributes="member: 43348"><p>Looking for help on a P0556 code (Brake Booster Pressure Sensor Circuit Range/Performance). It comes with a "Check Brake System" warning on the dash. It doesn't come on during my daily 20 min drive to work; but has come on the last four times I've been on the interstate. It's been pretty consistent in that it comes on ~10 min after getting on the interstate doing ~65mph. No issues with the brakes and they work the same after I get the warning. Once I turn the truck off, the warning goes away until the next time I'm on the interstate. </p><p></p><p>One other thing I've noticed. I had my Cam Phasers done about 2 months ago. Ever since, the brake pedal is a rock when the truck isn't running. Once the truck is started it feels normal. I didn't think anything of it until I started getting the warning messages.</p><p></p><p>I'm thinking a bad sensor or maybe a vacuum leak? The vacuum leak seems to make sense in that when the truck isn't running or making pressure the brake pedal is hard. Any ideas where to start trouble shooting?</p><p></p><p>Truck is a 2019 with ~42k miles on it.</p></blockquote><p></p>
[QUOTE="Navigator55, post: 1995063, member: 43348"] Looking for help on a P0556 code (Brake Booster Pressure Sensor Circuit Range/Performance). It comes with a "Check Brake System" warning on the dash. It doesn't come on during my daily 20 min drive to work; but has come on the last four times I've been on the interstate. It's been pretty consistent in that it comes on ~10 min after getting on the interstate doing ~65mph. No issues with the brakes and they work the same after I get the warning. Once I turn the truck off, the warning goes away until the next time I'm on the interstate. One other thing I've noticed. I had my Cam Phasers done about 2 months ago. Ever since, the brake pedal is a rock when the truck isn't running. Once the truck is started it feels normal. I didn't think anything of it until I started getting the warning messages. I'm thinking a bad sensor or maybe a vacuum leak? The vacuum leak seems to make sense in that when the truck isn't running or making pressure the brake pedal is hard. Any ideas where to start trouble shooting? Truck is a 2019 with ~42k miles on it. [/QUOTE]
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Ford F-150 Raptor General Discussions [GEN 2]
P0556 Code
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