Manifold Pressure/Vacuum Sensor: Testing and Inspection

1998 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Testing and Inspection
When the VCM detects a malfunction in the MAP sensor circuit, the following DTCs will set:

^ DTC P0106 circuit performance malfunction.

^ DTC P0107 circuit low.

^ DTC P0108 circuit high.

^ DTC P1106 intermittent circuit high.

^ DTC P1107 intermittent circuit low.

For DTC testing procedures refer to Diagnostic Tables / Diagnostic Trouble Code Tables. Testing and Inspection
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.