B4000 2WD V6-4.0L OHV (1994)
Air Flow Meter/Sensor: Testing and Inspection
Service Tips
Service Tip
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If the mass air flow sensor or circuit has an open or short, Diagnostic Trouble Code No. 129, 157, 158 or 159 is output.
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A malfunction in the mass air flow sensor circuit may cause lack of power, poor acceleration, hesitate at drive-away or vehicle shake on
deceleration.
