P0105 Fault Code

Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0105 fault code indicates a malfunction in the manifold absolute pressure (MAP) or barometric pressure sensor circuit. This code is triggered when the Engine Control Module (ECM) detects a reading from the MAP sensor that is out of the expected range. The MAP sensor is critical for air-fuel mixture calculations and optimal engine performance.

What are the symptoms of the P0105 code?

Common symptoms associated with the P0105 code include:

• Poor engine performance or hesitation during acceleration
• Increased fuel consumption
• Rough idling or stalling
• Check Engine Light (CEL) illuminated on the dashboard
• Failed emissions test due to incorrect readings

What causes the P0105 code?

Several factors can trigger the P0105 code, including:

• Faulty MAP sensor
• Open or short circuits in the wiring or connectors related to the MAP sensor
• Vacuum leaks in the intake manifold
• Malfunctioning ECM or software issues
• Blockages in the intake manifold that affect pressure readings

How to fix P0105?

To resolve the P0105 fault code, consider the following steps:

• Inspect the MAP sensor and its connections for any damage or corrosion.
• Check the wiring for shorts, breaks, or loose connections.
• Test the MAP sensor with a multimeter to ensure it operates within specifications
• Examine the intake manifold for vacuum leaks and blockages.
• Update or reprogram the ECM if it is found to be faulty.
• Replace the MAP sensor if it does not test appropriately.