B2795 Code - Unmatched Key Code
Quick Answer
The B2795 diagnostic trouble code (DTC) refers to an "Unmatched Key Code." This code typically indicates a problem with the key or key fob used to start the vehicle. Common causes include Defective key or key fob, Malfunctioning transponder chip, Faulty 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
- B2795 indicates Unmatched Key Code.
- Common causes
- Common causes include Defective key or key fob, Malfunctioning transponder chip, Faulty 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.
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Code B2795 Description
The B2795 diagnostic trouble code (DTC) refers to an "Unmatched Key Code." This code typically indicates a problem with the key or key fob used to start the vehicle. In modern vehicles, keys are equipped with transponder chips that communicate with the vehicle's immobilizer system. If the key's code does not match the expected code stored in the vehicle's computer, the B2795 code will be triggered.
Common Causes of B2795
- Defective key or key fob
- Malfunctioning transponder chip
- Faulty immobilizer system
- Weak or dead battery in the key fob
- Programming issue with the key or immobilizer system
Symptoms of B2795
- Vehicle does not start
- Engine starts but immediately shuts off
- Security light on the dashboard is illuminated
- Key fob buttons not working
How to Fix B2795
- Replace the key or key fob: If the key or key fob is found to be defective, it will need to be replaced. This may require reprogramming the new key to match the vehicle's immobilizer system.
- Check transponder chip: Ensure that the transponder chip in the key is functioning correctly. If not, it may need to be replaced.
- Test immobilizer system: Verify that the immobilizer system is working properly and communicating with the key. If there is a fault, it may need to be repaired or replaced.
- Replace key fob battery: If the key fob battery is weak or dead, replace it with a new one. A weak battery can cause communication issues between the key and the vehicle.
- Reprogram key: In some cases, reprogramming the key or immobilizer system may be necessary to resolve the issue.
Cost to Fix B2795
The cost of addressing a B2795 code can vary depending on the specific cause of the issue. Typically, replacing a key or key fob can range from $50 to $200, including the cost of the key and programming. If the transponder chip or immobilizer system needs repair, the cost can increase significantly. Labor costs can also vary, with rates typically ranging from $80 to $150 per hour. It is advisable to consult with a professional automotive technician to get an accurate estimate based on the specific circumstances of your vehicle.
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Code B2795 Information for Specific Makes
- B2795 Buick — Suspension Control Select Switch Circuit Malfunction
- B2795 Cadillac — Suspension Control Select Switch Circuit Malfunction
- B2795 Chevrolet — Suspension Control Select Switch Circuit Malfunction
- B2795 Ford — Solar Radiation Sensor Circuit Short To Ground
- B2795 GMC — Suspension Control Select Switch Circuit Malfunction
- B2795 Lexus — Unmatched Key Code
- B2795 Lincoln — Solar Radiation Sensor Circuit Short To Ground
- B2795 Mercury — Solar Radiation Sensor Circuit Short To Ground
- B2795 Scion — Unmatched Key Code
- B2795 Toyota — Unmatched Key Code
Frequently Asked Questions about B2795 Code
1. What does the OBDII code B2795 mean?
B2795 indicates an "Unmatched Key Code," meaning the vehicle's immobilizer system does not recognize the key being used.
2. What are the common symptoms of the B2795 code?
Symptoms include the engine not starting, the security light staying on or blinking, and the inability to unlock or start the vehicle with the key.
3. What causes the B2795 code to appear?
Common causes include a damaged or unprogrammed key, issues with the immobilizer system, or a malfunctioning key transponder or immobilizer control module.
4. How can I fix the B2795 code?
The most common fix is reprogramming the key to match the vehicle's immobilizer system. If that doesn’t work, the immobilizer system or key may need repair or replacement.
5. Can a dead key fob battery trigger the B2795 code?
No, a dead key fob battery typically prevents remote functions but does not trigger the B2795 code. However, if the immobilizer chip in the key is damaged, the code can appear.
6. Can I clear the B2795 code without fixing the issue?
Clearing the code with a scan tool may temporarily remove it, but if the underlying problem isn’t resolved, the code will return.
7. Is it safe to drive with the B2795 code?
No, the vehicle likely won’t start at all with this code active, so driving isn’t possible until the issue is resolved.
8. How much does it cost to repair the B2795 code?
Costs vary depending on the issue. Key reprogramming typically costs $50–$150, while replacing a faulty immobilizer control module can cost $300–$600 or more.
9. Can a locksmith fix the B2795 code?
Yes, many automotive locksmiths can reprogram keys or repair immobilizer systems to resolve the B2795 code.
10. Do I need to take my car to the dealership for a B2795 code?
While dealerships can fix this issue, many independent mechanics and locksmiths with the proper tools can also resolve it, often at a lower cost.
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