how can i check that to see if thats the problem
...look at the connector for failure and test each pin with a multimeter?I had to replace the EBPS pigtail when I replaced the sensor and sample tube.
Alliant ICP/EBP Sensor Connector Pigtail AP0021
The harness pins were corroded and loose. If the pigtail passes visual inspection and you have no continuity between each pin nor ground and positive/output leads then you need to follow the harness back until you find a clue.