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#27: 04-18-2008, 06:08 AM
 
 pitks
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Location: Toronto, Canada
Car: Legacy 2003 GT MT
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Code 31 is THROTTLE POSITION SENSOR.

DIAGNOSIS:
Input signal circuit of throttle position sensor is open or shorted.
TROUBLE SYMPTOM:
Shift point too high or too low; excessive shift shock; excessive tight corner “braking”.