OBD code B2793 indicates a communication error between the immobilizer system and the transponder key in the vehicle.
This affects the security system.
Symptoms include the Engine Light being ON.
The code is usually caused by a faulty key, transponder key coil, or transponder key ECU assembly.
It’s a moderate issue.
To fix it, inspect the wiring harness, connectors, and components for any damage or corrosion.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the b2793 OBD Code
The vehicle displays an illuminated airbag warning light on the dashboard.
- Symptoms: Engine Light ON.
- Vehicle may not start.
- Steering wheel may be locked.
- Vehicle may not shift out of park.
- Horn may not work.
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Causes of the b2793 OBD Code
Possible triggers for fault code B2793 include issues with the immobilizer system or key recognition problems.
- B2793 can be caused by a faulty key.
- A faulty transponder key coil.
- A faulty transponder key ECU assembly.
Fixing Error Code b2793 Step By Step
To address fault code B2793, inspect and repair the communication circuit between the immobilizer and ECM.
- To fix OBDII code B2793, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the steering lock ECU for any signs of malfunction or damage.
- If no issues are found with the wiring or connectors, consider resetting the steering lock ECU using a compatible diagnostic tool.
- Finally, if the problem persists, the steering lock ECU may need to be replaced with a new unit to resolve the B2793 fault code.
Cost Of Fixing b2793 Fault Code
Diagnosing and repairing fault code B2793 typically involves troubleshooting the vehicle’s immobilizer system.
The cost to diagnose and fix OBD code B2793 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. Factors like shop rates and complexity can affect the final cost.
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Details of the b2793 OBD Code
B2793 code indicates a communication error between the immobilizer and the ECM.
OBD code B2793 means that a communication malfunction has been detected in the immobilizer system.
This code is triggered by the immobilizer system control module when it is unable to communicate properly with the ECM (Engine Control Module) or other related modules in the vehicle.
The immobilizer system is involved in preventing the engine from starting without the correct key or key fob signal, enhancing vehicle security.
Mechanic’s Tech Notes
Code B2793 indicates a communication error between the immobilizer and the ECM in Toyota vehicles.
OBDII code B2793 indicates a communication error between the engine control module (ECM) and the transmission control module (TCM).
To diagnose, check TCM power and ground using a multimeter.
Verify TCM response over the Controller Area Network (CAN) using a scan tool.
Inspect wiring harness and connectors for damage, corrosion, or loose connections.
Ensure connector pins are intact.
Reflashing the modules may be necessary.
If the issue persists, consider replacing the TCM.
FAQ
OBD code B2793 indicates a problem with the transponder key system. Check for faulty key, transponder key coil, or ECU assembly. Inspect wiring and connectors for damage.
Common symptoms for OBD code B2793 include Engine Light ON, caused by a faulty key, transponder key coil, or ECU assembly. Inspect wiring and connectors for damage.
Diagnose OBD code B2793 by checking for a faulty key, transponder key coil, or ECU assembly. Inspect wiring harness, connectors, and pins for damage.
Wrap Up
If your vehicle is displaying OBD code b2793 along with issues like difficulty starting the engine or intermittent stalling, it may be caused by a malfunctioning immobilizer antenna, faulty transponder key, or a problem with the immobilizer system circuit.
To address OBD code b2793, start by checking the wiring and connectors related to the immobilizer system.
Ensure there are no loose connections, damaged wires, or corrosion present.
Test the immobilizer antenna and transponder key for proper functionality, and replace any components that are found to be defective.
