My rear hatch doesn't close completely.

Latch on bottom and latch on door works perfect.

When it closes, the system think it's closed. no light on.

The issue are it looks ugly and come out cold or warm air from it when a/c or heater are used.

Is there some way I can adjust?

I tried to unscrew bolts and adjust both latche positions but no space to move around either bottom or door latch.

Is there some way I can adjust?

Fixed finally

found problem at multiple vacuum lines.

I changed ldp twice (even they are in good resistance values)

I checked valve on canister if it works at 12v.

Changes purge valve.

Checked purge valve (opens at 12v close at none)

Changed change over valve and checked with 12v.

Checked vacuum lines from both DVs to change over valve.

Changed cap.(I didn't think it's cap but I changes anyway)

Checked if there are any short/open circuits from ecu and valves on canister and ldp.

I found problem at mutiple vacuum lines

from DV to leak detection pump.

After I replace and rearrange. Issue solved. No cell or no code stored in ECU for 2 weeks now.

P2451

Evaporative Emission System Switching Valve Stuck Closed

Any one knows how to fix?

What is switching valve?

I changed ldp twice (even they are in good resistance values)

I checked valve on canister if it works at 12v.

Changes purge valve.

Checked purge valve (opens at 12v close at none)

Changed change over valve and checked with 12v.

Checked vacuum lines from both DVs to change over valve.

Changed cap.(I didn't think it's cap but I changes anyway)

Checked if there are any short/open circuits from ecu and valves on canister and ldp.

What do I need to do after? I am lost.

I went a porsche dealer and they told me they can't help because I altered parts.

Even I just changed few tubes and pipes which were leaked with aftermarket tubes and pipes.

What the...

Looks not too different the pictures online.

Is 2ndary bypass pipe for 2004 cs will fit my 2004 ctt?

 

P2403 Evaporative Emission System Leak Detection Pump Sense Circuit/Open

 

Possible cause of fault

- EVAP canister purge valve stuck in closed position

- Purge air line between EVAP canister purge valve and active charcoal filter blocked

- Open circuit in signal line

- Short circuit to ground in signal line

- Leakage diagnosis pump faulty (diaphragm or reed switch stuck, solenoid valve stays open)

- DME control module faulty

 

are there any other solution or suggestion than this?

I ve already tried to change bunch of stuffs on the list other than ECU.

Exact model and year of your car please?

2004 Cayenne 4.5 Turbo