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Home >> Volkswagen >> 2005 >> Jetta TDI, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) >> 01 On Board Diagnostic (OBD) >> Measured value blocks >> Evaluating Measured value blocks, at idle >> Evaluation: Air mass drawn in display

Evaluation: Air mass drawn in display

WARNING: This page is about a different variant/trim than selected.
VAG1551 display Possible cause of malfunction Corrective action
Below 800 mg/H
  • RPM too low or too high
  • Display specified value at 3000 RPM.
 
  • Manifold Absolute Pressure too low
 
  • Mass Air Flow Sensor G70 inoperative
  • Check Mass Air Flow function → Mass Air Flow (MAF) sensor G70 , checking  .
  • If a DTC is present, Measured value block indicates a constant air mass value of approx. 550 mg/H over total speed and load range.
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