P055600 - Pressure sender for brake booster implausible signal

[Johnny Grama]

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 .

[Sasboulder]

Was that code setting before replacement of the vacuum pump? Probably a good idea to smoke test the intake and see if/what's leaking vacuum. Or is the sensor wiring good, fully seated connector etc. 

[hvdb]

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!!