Ford Thunderbird P0108 OBD-II code issue related to BO MAP sensor location and OEM part number on Ford Thunderbird

Submitted by J Hutch · Jun 23, 2025
Published by RepairPal

Problem overview

Some Ford Thunderbird owners report experiencing issues related to the P0108 OBD-II code, which indicates that the Manifold Absolute Pressure (MAP) sensor is sending a higher voltage signal than expected to the engine control module (ECM). This problem can arise if the MAP sensor or its circuit is faulty, as the sensor's operating voltage should not exceed 5 volts. Owners may notice that the MAP sensor should ideally read around 1.5 volts at idle and approximately 5 volts at full throttle; however, the P0108 code suggests excess voltage has been detected. To diagnose this issue, using an OBD-II scanner is essential for retrieving stored trouble codes and identifying related problems. Some owners find it helpful to check and clean sensor connections, inspect for damage or corrosion, and ensure the sensor is securely mounted. Additionally, when replacing the MAP sensor, comparing its reading with the Barometric pressure reading is crucial, as a difference of more than 0.5 volts indicates the need for replacement. For specific information regarding the MAP sensor's location and OEM part number, consulting the vehicle's service manual or a certified Ford dealership is recommended.

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