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2001 GMC SAVANA
4.3L V6•RWD•gas•L35
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Repairs0Labor505Torque139Fluid8DTC1762Battery1Maintenance0Recalls0
P1408moderate severityPowertrain

Intake Manifold Pressure Sensor Circuit

on 2001 GMC Savana 4.3L V6 · RWD

What this code means

The PCM detects a fault in the intake manifold pressure sensor circuit. Similar to MAP sensor code P0107, this affects load and fuel calculations.

Symptoms

  • Check engine light on
  • Poor fuel economy
  • Hesitation or stalling

Common causes

  • Faulty MAP sensor
  • Damaged sensor wiring
  • Vacuum leak at sensor
  • Corroded connector

Diagnostic steps

  1. Scan for stored codes
  2. Monitor MAP sensor readings
  3. Inspect sensor and vacuum connection
  4. Test sensor reference and signal circuits
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