Manifold Absolute Pressure (MAP) Sensor
A sensor that measures air pressure inside the intake manifold.
The MAP sensor calculates engine load by measuring vacuum pressure in the intake manifold. The ECU uses this data to determine fuel injection quantity and ignition timing. Faulty readings lead to poor fuel economy and sluggish acceleration. Testing includes checking sensor voltage at different engine speeds. Replacing a damaged MAP sensor often resolves drivability issues quickly. It's a critical input for efficient air-fuel mixture control, especially in turbocharged engines.
Related Diagnostic Guide
This topic is part of CHEPQ’s system-level diagnostic framework.
For a broader understanding of how this component is analyzed in real-world diagnostics, refer to the following guide:
Applying This Knowledge in Practice
The diagnostic principles discussed above are commonly applied in real-world vehicle diagnostics. To put this knowledge into practice, explore professional automotive diagnostic tools designed to support system testing, fault analysis, and troubleshooting across modern vehicles.