P0106: Manifold Absolute Pressure (MAP) Sensor Performance Problem

What does the P0106 error code mean?

The P0106 diagnostic trouble code signifies a "Manifold Absolute Pressure (MAP) Sensor Performance Problem." The MAP sensor is critical because it measures the pressure within the intake manifold. This helps the engine control module adjust fuel delivery and ignition timing to optimize performance and efficiency.

When the P0106 code is triggered, the engine control module has detected a signal from the MAP sensor that pressure is outside the expected range based on the engine load, throttle position and rpm.

Importance of addressing P0106

The MAP sensor plays a crucial role in maintaining the correct air-fuel mixture and engine timing. If it sends incorrect readings, the engine may operate inefficiently. Poor fuel economy, increased emissions, and potential damage to critical components are all potential symptoms. Neglecting this issue can worsen drivability and cause higher repair costs over time.

Should you drive with a P0106 error code?

Even though it's possible to drive with this error code, it's not recommended. This code may cause hesitation in the vehicle, a reduction in power, or stalling. All of which can compromise safety, particularly in traffic or during acceleration. Prolonged driving under these conditions can also lead to engine damage or increased wear on related components.

Common symptoms of P0106 error code

• Check engine light illuminated
• Poor acceleration or hesitation during throttle input
• Rough idling or engine stalling
• Decreased fuel efficiency
• Black smoke from the exhaust (indicating a rich fuel mixture)
• Difficulty starting the vehicle

Diagnosing the P0106 error code

Diagnosing the P0106 error involves a systematic approach:

• Scan for codes: A mechanic uses an OBD-II scanner to confirm the P0106 code and check for related codes.
• Visual inspection: Inspect vacuum lines, hoses and the intake manifold for leaks or damage.
• Sensor testing: Use a multimeter to measure the MAP sensor's voltage and ensure it matches manufacturer specifications.
• Compare data: Analyze live data from the MAP sensor and compare it to the throttle position sensor and barometric pressure readings.
• Check wiring: Inspect the MAP sensor’s wiring and connectors for corrosion, loose connections or fraying.
• Perform engine tests: Conduct a smoke test or use a vacuum gauge to detect intake manifold leaks.

Common repairs for the P0106 error code 

The steps to repair a P0106 error depend on the diagnosis but commonly include:

• Replacing a faulty MAP sensor if it is not functioning correctly.
• Repairing or replacing damaged or loose wiring and connectors.
• Fixing vacuum leaks in hoses or the intake manifold.
• Cleaning or replacing clogged air filters that may restrict airflow.
• Updating the engine control module software if a manufacturer-specific issue is identified.
• Clearing the code and performing a test drive to ensure the issue is resolved.

Getting other error codes?

Visit Edmunds' catalog of ODB-II diagnostic trouble codes to help assess your vehicle's issue.