B2793 Code - Transponder Chip Malfunction
Quick Answer
The B2793 diagnostic trouble code (DTC) indicates a Transponder Chip Malfunction in the vehicle's immobilizer system. Common causes include Faulty transponder chip in the key, Issues with the immobilizer system itself, Wiring or connection problems between the transponder chip and the immobilizer system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B2793 indicates Transponder Chip Malfunction.
- Common causes
- Common causes include Faulty transponder chip in the key, Issues with the immobilizer system itself, Wiring or connection problems between the transponder chip and the immobilizer system.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code B2793 Description
The B2793 diagnostic trouble code (DTC) indicates a Transponder Chip Malfunction in the vehicle's immobilizer system. The transponder chip is a small electronic device embedded in the vehicle key that communicates with the immobilizer system to allow the engine to start. When the transponder chip malfunctions, it can prevent the engine from starting, leading to a no-start condition.
Common Causes of B2793
- Faulty transponder chip in the key
- Issues with the immobilizer system itself
- Wiring or connection problems between the transponder chip and the immobilizer system
- Low battery voltage affecting the transponder chip's communication
- Interference from other electronic devices affecting the transponder chip signal
Symptoms of B2793
- Engine cranks but does not start
- Immobilizer warning light illuminated on the dashboard
- Inability to start the engine even with a properly functioning key
- Vehicle starts intermittently or requires multiple attempts to start
How to Fix B2793
- Check the key: The first step is to inspect the transponder chip in the key for any visible damage. If the key appears to be in good condition, proceed to the next step.
- Diagnostic scan: Use a diagnostic scanner to retrieve the specific details of the B2793 code and identify the exact cause of the transponder chip malfunction.
- Replace key/transponder chip: If the issue is with the key itself, a replacement key with a functioning transponder chip may be necessary.
- Repair immobilizer system: If the issue lies with the immobilizer system, it may need to be repaired or reprogrammed to recognize the transponder chip.
- Check wiring and connections: Inspect the wiring and connections between the transponder chip and the immobilizer system for any loose connections or damage that may be affecting communication.
Cost to Fix B2793
The cost of repairing a transponder chip malfunction can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing a key with a transponder chip can range from $50 to $200, including the cost of the key and programming. If the issue is with the immobilizer system itself, the repair costs can range from $100 to $500, depending on the extent of the repairs needed. It's important to factor in diagnostic time and labor rates, which can vary between $80 and $150 per hour at most auto repair shops. Be sure to consult with a professional technician for an accurate estimate based on your vehicle's make and model.
Need more information about the B2793 code?
Need more information on how to fix the B2793 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B2793 code diagnosed by a professional: Find a repair shop in your area
Code B2793 Information for Specific Makes
- B2793 Lexus — Transponder Chip Malfunction
- B2793 Scion — Transponder Chip Malfunction
- B2793 Toyota — Transponder Chip Malfunction
Frequently Asked Questions about B2793 Code
1. What are the common symptoms of OBDII code B2793 (Transponder Chip Malfunction)?
The common symptoms include the inability to start the vehicle, intermittent starting issues, and the immobilizer system light staying illuminated.
2. What causes the OBDII code B2793 (Transponder Chip Malfunction)?
This code is typically caused by a malfunctioning transponder chip in the vehicle's key, a faulty immobilizer system, or issues with the key fob.
3. How can I diagnose the OBDII code B2793 (Transponder Chip Malfunction)?
Diagnosing this code usually involves checking the transponder chip in the key, testing the immobilizer system, and verifying the signal between the key and the vehicle's computer.
4. Can I still drive my vehicle with the OBDII code B2793 (Transponder Chip Malfunction)?
It is not recommended to drive the vehicle with this code as it may result in starting issues or complete immobilization of the vehicle.
5. How can I repair the OBDII code B2793 (Transponder Chip Malfunction)?
Repair options include reprogramming the transponder chip, replacing the key fob, repairing the immobilizer system, or consulting a professional automotive locksmith.
6. Is it possible to reset the OBDII code B2793 (Transponder Chip Malfunction) without repairs?
Resetting the code without addressing the underlying issue may temporarily clear the code, but the problem will likely reoccur until the root cause is fixed.
7. Can a DIY enthusiast fix the OBDII code B2793 (Transponder Chip Malfunction)?
While some simple checks like battery replacement in the key fob can be done by a DIY enthusiast, resolving complex issues with the transponder chip or immobilizer system may require professional help.
8. How much does it cost to repair the OBDII code B2793 (Transponder Chip Malfunction)?
The cost of repair can vary depending on the extent of the issue and the specific components that need to be fixed or replaced. It's advisable to get quotes from automotive professionals.
9. Are there any preventive measures to avoid OBDII code B2793 (Transponder Chip Malfunction)?
Regularly checking the condition of the key fob battery, ensuring proper handling of the key, and promptly addressing any starting issues can help prevent this code from occurring.
10. Can a local auto parts store read the OBDII code B2793 (Transponder Chip Malfunction)?
Most local auto parts stores offer free OBDII code reading services, which can help identify the issue. However, diagnosing and repairing the underlying cause may require the expertise of a professional mechanic or locksmith.
Discuss the causes and fixes for B2793 OBDII Code
Code B2793 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.