B4000 2WD V6-4.0L OHV (1994)
Throttle Position Sensor: Testing and Inspection
Service Tips
Service Tip
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If the Throttle Position Sensor or circuit has an open or short, Diagnostic Trouble Code No. 121, 122, 123 or 167 is output.
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If the throttle position sensor circuit fails, rough idle, poor acceleration or shift shock (AT) may occur.