P0105 - MAP/BARO Circuit Malfunction

MAP/BARO sensor circuit fault detected.

Code Overview

MAP/BARO sensor circuit fault detected.

Common Causes

• MAP sensor failure
• Wiring or connector fault in the MAP circuit
• Vacuum hose or sensor-port problem on systems that use one
• Engine condition affecting manifold vacuum

Symptoms

• Rough idle or hesitation
• Poor power or weak acceleration
• Fuel economy may drop if load calculations are off

Diagnostic Steps

1. Compare MAP readings to expected values at key-on and idle
2. Inspect the vacuum hose or sensor port for leaks or blockage if equipped
3. Verify 5-volt reference, ground, and signal integrity at the sensor
4. Inspect connector pins and harness condition before replacing parts

Repair Difficulty

Moderate

General difficulty estimate for the most common repair path.

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

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Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.