DTC B2903 Lincoln

Description

When the accelerator is closed suddenly, excessive boost pressure can build up between the Turbocharger and the Throttle Body which can cause damage to the Turbocharger. This can occur because the compressed air created by the Turbocharger has no place to go. This results in compressor surge. The Powertrain Control Module (PCM) detects this pressure increase from feedback provided by the Boost Pressure Sensor. The Boost Pressure Sensor operates as a typical three wire sensor. The PCM provides a 5-Volt Supply and Sensor Return circuit to the Boost Pressure Sensor and receives a feedback voltage on the signal circuit.