OBD-II FAULT CODE
P1106

Dual Alternator Lower Fault/ Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage

Reference information for P1106. Because this is manufacturer-specific, confirm the exact definition for the vehicle before using the diagnostic guidance below.

Manufacturer-specific code

This code can have different meanings depending on vehicle make, model and year. Treat the definition below as a reference and confirm it with OEM service information before diagnosis or repair.

PowertrainSystem
Air / load sensorCategory
MediumSeverity
  • Check Engine light
  • Poor drivability or reduced fuel economy depending on fault
  • Faulty MAP sensor
  • Vacuum hose leak/blockage
  • Wiring/connector fault
  • High signal voltage
  • Open ground
  • Scan all modules and record freeze-frame data before clearing codes
  • Check battery voltage and related fuses
  • Compare MAP reading key-on-engine-off to barometric pressure
  • Inspect vacuum port/hose and wiring
  • Check sensor ground and signal circuit for short to voltage
  • Clean blocked port, repair hose/wiring, replace sensor if confirmed faulty
  • Repair ground/signal circuit or replace confirmed faulty sensor
  • Clean/secure connector and repair damaged harness
Need more help?

Search manuals, wiring diagrams and technical service bulletins.

Not sure what to do next?
Get step-by-step instructions and professional repair information.
Disclaimer: Information is provided for general guidance only and may not apply to all vehicles. Always consult a qualified technician.