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Fault code 0003: Diagnosis/troubleshooting

WARNING: This page is about a different car, the 2006 Porsche Cayenne, 2005 Porsche Cayenne, 2004 Porsche Cayenne, and 2003 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Work instruction Display OK If not OK
1 Ignition on for at least 6 minutes No warning in instrument cluster
Go to Erase fault memory
โ†’ End
Red warning in instrument cluster
Go to Step 2
2 Replace control unit (level control) โ†’ End