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Cayenne with air suspension has an air line, in-line filter, to clean the incoming pump air. If this filter comes off the mounting "straw" off the bank1 (passenger) air box - the P2096 code will manifest itself.
Now, let's get to how we can all prevent water intrusion in the first place...
Does a "pending P0421 DTC " prevent from setting evap, SAI and catalyst monitors? I have driven 1000 miles and the three pesky I/M readiness monitors still has not set!
If the return spring broke(near caliper side) will the shoes slightly grind-up against the inner rotor? I have been trying to diagnose this annoying "whump-whump" sound for 3 weeks now!
Loren, are the brake shoe return springs replaceable? I think one side of mine broke, as I heard a POP when depressing the parking brake pedal once. Now, the left rear wheel makes a spinning noise from 20-45mph. It sounds like a out-of-balance tire, but the tires has been changed 3 times already....
Thanks! Where should I start looking for grounds?
Loren, Where are the fuses for the 955 Turbo cornering lamps? Mine are both out and bulbs are brand-new. Lamps are new Valeo units. The left side bulb burned out but dash message indicated to "check right cornering lamp." Now, both don't work. Could they be pigtail harness, ballasts.... or, something more sinister?
Common failures are all at the hose joints, mainly the cracking joint of the main pump spider hose and firewall cowl line to master cylinder. I used a self-fusing, silicone wrap tape and telecommunications-grade zip ties to wrap and tighten all the spider hose joints. The "Brake Booster Faulty" message should disappear after first pressing the brake pedal to start the car and the pump runs, to re-vacuum itself. Vacuum pump should not run while in drive.
Are you seeing sooty oil droplets on your rear hatch? That is a telltale sign the RMS is gone.... and, honestly they rarely ever go if using the right oil. I say get a second opinion...