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Home >> Oldsmobile >> 1991 >> Toronado Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.8L PFI >> Diagnostic Flow Charts For Codes: 13 To 68 >> Code 31, Park/Neutral Switch Circuit

Code 31, Park/Neutral Switch Circuit

NOTE: Complete diagnosis of Code 31 for (VIN L) E Body vehicles requires the use of the GM Tech 1 "Scan" tester which is capable of indicating status of all 4 park/neutral switch positions.
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