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Porsche Hybrid Failure system implausible Signal Fault Code 55600

hvdb
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hvdb Member

hvdb

Posted
Posted

Hi All,

I recently purchase 2012 Porsche Panamera S Hybrid and I have a hybrid Fault code P055600 Implausible Signal. My garage did a Smoke test and replaced the brake sensor and brake distance sensor.

The conditions are:
- “Fault Hybrid System” yellow warning pops up.
- Hybrid system itself works perfectly when erasing the code with a code scanner, but the error comes back mostly after a restart. 
- On the freeway driving ore after a reset it never fails.
- The ignition do not start at the first try (almost like it’s not detecting the brake switch), it always starts with the second attempt.

If anyone can point out the possible issues here, please help!

  • 3 weeks later...
hvdb Member

hvdb

Posted
  • Author
Posted
On 1/8/2022 at 5:09 PM, Loren said:

You are likely going to need a Porsche specific scanner (like PIWIS) to diagnose this issue.

Problem solved. Brake booster relay replaced

  • 10 months later...
  • 1 year later...
craig daley Member

craig daley

Posted
Posted
On 1/8/2022 at 4:09 PM, Loren said:

You are likely going to need a Porsche specific scanner (like PIWIS) to diagnose this issue.

hello .. can you tell me where the brake booster relay is situated please 

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
4 hours ago, craig daley said:

hello .. can you tell me where the brake booster relay is situated please 

 

Exact model and year of your car please.

  • 4 weeks later...

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