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Home >> Porsche >> 2005 >> Cayenne Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> OBD (II) - Diagnostic Introduction, Fault Code Index >> OBD (II) >> Introduction >> Diagnosis conditions >> Faulty DME

Faulty DME

NOTE:
  • Faulty control modules are extremely rare! Although almost every fault can theoretically also be caused by a faulty control module, past experience has shown that, for DME control modules in particular, even control modules sent in for inspection turned out to be OK.
  • We would again like to stress the necessity of thoroughly examining all other possible fault causes before replacing a DME control module (this is the last logical step at the end of a fruitless troubleshooting procedure). If necessary, the fault entry must be deleted and a test drive or short test must be performed.
  • If further faults have been recorded, these are to be remedied first according to instructions (example: a fault in the inlet camshaft can, under certain circumstances, cause an oxygen sensor fault to be issued).
  • CAN timeout fault entries are critical faults which, when they occur alone, are not necessarily caused by a malfunction. Instead, these CAN timeout faults are intended to provide additional information when other faults (even 'non-CAN faults') are recorded or when functions are impaired.
  • Fault entries that are connected only with troubleshooting, repairs or the programming of control modules (e.g. CAN timeout errors) must be erased.
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