The OBD code Gmc B0790 indicates a problem with the Transfer Case Select Switch circuit.
Symptoms include the Engine Light being ON.
This code is usually caused by a faulty Transfer Case Select Switch or issues with the wiring harness/connectors.
It is important to address this issue promptly to prevent further damage.
A possible fix is to inspect the wiring harness and connectors for any damage or poor connections.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
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Symptoms of the Gmc b0790 OBD Code
The vehicle displays an issue related to the GMC B0790 fault code.
- Symptoms: Service Airbag Warning Light ON.
- Airbag system may not deploy in a crash.
- Steering wheel controls may not work.
- Horn may not function.
Causes of the Gmc b0790 OBD Code
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Code Gmc B0790 typically indicates a fault related to the passenger presence system in the vehicle.
- B0790 can be caused by a Faulty Transfer Case Select Switch.
- A Transfer Case Select Switch harness that is open or shorted.
- A Transfer Case Select Switch circuit with poor electrical connection.
- Or a Faulty Transfer Case Shift Control Module (TCCM).
Fixing Gmc Error Code b0790 Step By Step
Address the faulty seat position sensor circuit in a GMC vehicle displaying fault code B0790.
- To fix GMC OBDII code B0790, first, review the possible causes mentioned above.
- Visually examine the wiring harness and connectors related to the code.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- If no issues are found with the wiring and connectors, consider resetting the module that is associated with the code.
- Perform any necessary software updates or reprogramming procedures.
- If the problem persists, it may be necessary to replace the module that is triggering the B0790 fault code.
Cost Of Fixing Gmc b0790 Fault Code
Repair for GMC fault code B0790 involves replacing the passenger presence system sensor.
The cost to diagnose and fix a GMC OBD code B0790 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour, so the total cost could be between $75 and $150. The final cost may vary based on shop rates and the complexity of the repair.
Details of the Gmc b0790 OBD Code
GMC fault code B0790 relates to a problem with the passenger airbag status indicator circuit.
GMC OBD code B0790 means that there is a fault in the Park Brake Switch Circuit.
This code is triggered by the Body Control Module (BCM) when it detects an issue with the park brake switch circuit.
The park brake switch is part of the system that indicates when the parking brake is engaged or disengaged.
When this circuit malfunctions, it can lead to issues with the parking brake system, potentially affecting the vehicle’s safety.
Mechanic’s Tech Notes
This section provides detailed information on GMC fault code B0790.
OBDII code B0790 for GMC indicates a problem with the Transmission Control Module (TCM) power circuit.
To diagnose, use a voltmeter to check TCM power and ground connections for proper voltage and continuity.
Utilize a scan tool to confirm TCM communication over the Controller Area Network (CAN) bus.
Visually inspect wiring harnesses and connectors for any damage, and ensure connector pins are not broken, bent, or corroded.
If all connections and wiring look good, consider reprogramming or replacing the TCM as needed.
FAQ
OBD code B0790 in a GMC indicates an issue with the Transfer Case Select Switch. Check for faulty switch, wiring harness, or poor electrical connection.
Common symptoms of OBD code B0790 in a GMC vehicle include Engine Light ON, caused by issues with the Transfer Case Select Switch or related components.
Diagnose OBD code B0790 in GMC: Symptoms Engine Light ON. Causes Faulty Transfer Case Select Switch, harness issues. Fix Inspect wiring, connectors for damage or corrosion.
Wrap Up
If your GMC is displaying OBD code B0790 and you’re experiencing issues with the airbag system, it could be caused by a faulty passenger presence system sensor, wiring problems in the airbag system, or a malfunctioning airbag control module.
To address GMC OBD code B0790, start by inspecting the wiring harness and connectors related to the passenger presence system sensor.
Check for any damaged wires, loose connections, or corrosion.
If no issues are found, consider testing the sensor itself for proper operation or consulting a professional for further diagnosis.
