Operation CHARM
: Car repair manuals for everyone.
Home
>>
Oldsmobile
>>
1994
>>
Achieva V6-3100 3.1L MFI VIN M
>>
Repair and Diagnosis
>>
A L L Diagnostic Trouble Codes ( DTC )
>>
Testing and Inspection
>>
Manufacturer Code Charts
>>
DTC 99
DTC 99
DTC 98 or 99 will be stored when an invalid program is detected by the PCM. Reprogram PCM. If DTC 98 or 99 continues to be displayed using a Tech 1 (or equivalent scan tool), replace PCM.