B0100 - FAULT CODE - OBD2
B0100 Code failures by brands
B0100 PONTIAC, GMC, CADILLAC, BUICK, CHEVROLET, SATURN: DRIVER-SIDE EFS VALID ID NOT RECEIVED
Description of DTC code B0100
The EFS (Electronic Frontal Sensor) is also known as the front sensor, which modulates the current at the interface in order to send the state of health (SOH), identification commands, and the display to the SDM (Sensing and Diagnostic Module), which is responsible for providing the sensor with power and ground voltage.
After switching on the ignition, the Electronic Frontal Sensor detects the supply voltage sent by the SDM, the sensor diagnoses its internal operation and proceeds to indicate the identification to the controller. The message will be considered valid only if it is received within 5 seconds after the sensor is activated.
When the diagnostic code B0100 OBDII is stored, it is because the message with the valid identification has not been received from the Electronic Frontal Sensor.
Symptoms of fault code B0100
- Check Engine light illuminated.
- The airbag warning lamp illuminated.
Causes of OBD2 B0100
DTC B0100 OBD2 is set by the following:
- There may be faulty Electronic Front Sensor wires or connectors.
- The Electronic Front Sensor may be defective.
- The SDM (Sensing and Diagnostic Module) could be damaged.
Possible solutions of the DTC code B0100
To correct the B0100 OBDII fault code consider the following:
- Consult the TSB.
- Verify that there is no damage to the connectors or wires that are related to the Electronic Front Sensor. Repair or replace as necessary.
- Perform electrical tests on the EFS circuit and the sensor in question. In order to make a correct diagnosis, we advise you to follow the steps outlined by the manufacturer in their specifications. If inconsistencies are found, proceed with the required corrective actions.