Error code

OBD2 P0105

OBD2P0105
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Manifold Absolute Pressure/Barometric Pressure Circuit.

Severity

moderateCan drive but performance issues may occur.

Summary

P0105 indicates a malfunction in the Manifold Absolute Pressure (MAP)/Barometric Pressure circuit, which can affect engine performance due to incorrect pressure readings.

Symptoms

  • Illuminated check engine light
  • Increased fuel consumption
  • Hard starting
  • Reduced engine power
  • Hesitation upon acceleration

Common Causes

  • Misfire or lean-running conditions
  • Unmetered air entering the inlet tract through leaks
  • Open/short circuits in associated wiring due to corrosion or damage
  • Defective MAP, MAF, BARO, or TPS sensors
  • Clogged catalytic converter(s)
  • Loss of ground contact to MAP or TPS sensor

Diagnosis

  1. Check freeze frame data with a scanner/code reader.
  2. Inspect for visible damage, dirt, and oily residues on sensors.
  3. Test MAP sensor by applying vacuum and monitoring signal voltage changes.
  4. Verify reference voltages, ground connections, and continuity in the circuit.

Fixes

  • Clean or replace faulty MAP/MAF/BARO/TPS sensors as needed.
  • Repair damaged wiring and connectors.

FAQ

What does P0105 mean?

P0105 indicates a malfunction in the MAP/Barometric Pressure circuit, affecting engine performance due to incorrect pressure readings.

How do I diagnose P0105?

Diagnose by checking freeze frame data, inspecting sensors and wiring for damage or dirt, testing MAP sensor with vacuum, and verifying reference voltages and continuity in the circuit.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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