Expert: Kevin - 9/26/2009

Question
po 720 output shaft speed senser were is it  my check engine lights on  having trouble shifting

Answer
Symptom:
P-0720 LOW OUTPUT SPEED SENSOR RPM, ABOVE 15 MPH
When Monitored and Set Condition:
P-0720 LOW OUTPUT SPEED SENSOR RPM, ABOVE 15 MPH
When Monitored: Continuously with the key on, engine running, and gear selector not in
park or neutral.
Set Condition: This code is set if the vehicle speed (as determined from the vehicle speed
sensor), is above 15 MPH, and the output shaft speed is below 60 RPM for 2.6 seconds.
POSSIBLE CAUSES
DTC CODE RETURNS
OUTPUT SPEED SENSOR DEFECTIVE
PARK/NEUTRAL SWITCH CODE PRESENT
OUTPUT SPEED SENSOR GROUND CIRCUIT OPEN
OUTPUT SPEED SENSOR GROUND CIRCUIT SHORT TO GROUND
OUTPUT SPEED SENSOR SIGNAL CIRCUIT OPEN
OUTPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND
PCM DEFECTIVE (DRB SHOWS > 60 RPM)
OUTPUT SPEED SENSOR HARNESS OBSERVABLE DEFECT
OUTPUT SPEED SENSOR WIRING HARNESS INTERMITTENT DEFECT