B2795 Code - Unmatched Key Code
Quick Answer
This Diagnostic Trouble Code (DTC) is output when a key with a key code that has not been registered in the ECU or with a different vehicle serial number is inserted into the ignition key cylinder. Common causes include Faulty Key, Faulty Transponder Key ECU Assembly. 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 Faulty Key, Faulty Transponder Key ECU Assembly.
- 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.
Code B2795 Description
What are the Possible Causes of the DTC B2795?
- Faulty Key
- Faulty Transponder Key ECU Assembly
How to Fix the DTC B2795?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B2795 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Need Help with the Code?
Get the B2795 code diagnosed by a professional: Find a repair shop in your area
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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