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P055600 - Pressure sender for brake booster implausible signal

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Hi Guys, 

Can someone please help me out ? I recently purchase 2011 Porsche cayenne S Hybrid and already had to change the Vacuum pump, after the installation we got this error P055600 .

The error stands for " Pressure sender for brake booster implausible signal ".

We changed the Sensor and we after we reset the code disappear . Took the car for road test for 10 min , when we park the car in front of the garage and brake, the error code came back .

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  • 2 years later...

Hi @Johnny What was the problem and fix for P055600 Implausible Signal. I do have the same fault cod and my garage can not find the problem. My garage did a Smoke test an replace the brake sensor. After resetting the faultcode I get the hybrid fault code again after a few days most of the time directly after starting the car!!

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