16485/P0101/000257

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Contents

16485/P0101/000257 - Mass Air Flow Sensor (G70): Implausible Signal

Possible Symptoms

  • Loss of Power
  • Erratic Idle

Possible Causes

  • Mass Air Flow Sensor (G70) faulty
  • Air Leak(s) after Mass Air Flow Sensor (G70)
  • Excessive restrictions in the Intake/Exhaust System
    • Dirty air filter, clogged snow screen, clogged CAT
  • Ground Spots corroded or Paint Residue
  • Wiring and/or Connections from/to Mass Air Flow Sensor (G70) faulty

Possible Solutions

  • Check Intake Air Filter
  • Check Mass Air Flow Sensor (G70)
  • Check Ground Spots
  • Check Wiring and/or Connections from/to Mass Air Flow Sensor (G70)

Special Notes

  • In MY 1995-2002 (?) in Europe at VW-diesel-cars G70 had the bad reputation of slowly losing his performance, causing loss of power. It's not a matter of defective or breaking down, but it is filthy / dirty (not easy to clean). You can check functionality by making a log in [01-engine], [meas.blocks-08], group 003 (3e gear, full throttle, from 1700-4000rpm)
  • It is not uncommon for a TDI to set Implausible Signal Mass Air Flow Sensor (G70) faults when the engine performance is reduced due to a mechanical problem. These mechanical problems may include, but are not limited to:



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