DTC Saturn B3873 Short Explanation
Channel: Maxidot Saturn
Date: 25/09/2020

The video focuses on the basic Saturn specific diagnostic error code.
Contents:
0:21 Basic DTC analysis according to OBD2 protocol standard.
1:48 Insight into programming
- an explanation of what a bit is and how a byte is formed
- decoding the Error Code to the base programming
2:58 A diagnostically understandable description of the Diagnostic Trouble Code
3:05 Basic error definition
- Possible causes or errors of the car and its parts describing the mentioned error

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Make:
Saturn
Code:
B3873
Definition:
Manifold Absolute Pressure or Barometric Pressure Sensor Circuit Low Input
Description:
Engine started,the temperature must beat least 185-degrees (F) and all electrical equipment (A or C,lights,etc) must be off.The ECM detected the BARO sensor was out of range during the CCM test.The BARO sensor signal should be in 4.5v.The BARO sensor is a variable capacitance unit used to detect altitude.
Cause:
 Sensor has deteriorated (response time too slow) or has failed MAP sensor signal circuit is shorted to ground MAP sensor circuit (5v) is open MAP sensor is damaged or it has failed BARO sensor signal circuit is shorted to ground BARO sensor circuit (5v) is open BARO sensor is damaged or it has failed ECM is not connected properly ECM has failed