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Home >> Pontiac >> 1988 >> Fiero Formula, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 2.8L VINS [S,9] PFI CEC Tests W/Codes >> Diagnostic Code Flow Charts (Code Charts) >> Code 24 - Vehicle Speed Sensor >> Diagnostic Aids

Diagnostic Aids

A "Scan" tester should indicate a vehicle speed whenever the drive wheels are turning greater than 3 MPH. A faulty or misadjusted Park/Neutral switch can result in a false Code 24. Use "Scan" tester and check for proper signal while wiggling shifter in Drive.

Fig 1: Code 24 Flow Chart - Vehicle Speed Sensor
G74303
Fig 2: Code 24 Flow Chart - Vehicle Speed Sensor
GB0049032
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