B305C Buick Code - Immobilizer Transponder Of Wrong Type Programmed
Quick Answer
When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energized by the exciter coil surrounding the ignition lock cylinder. Common causes include Faulty Key/Transmitter, Faulty Body Control Module (BCM). 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
- B305C Buick indicates Immobilizer Transponder Of Wrong Type Programmed.
- Common causes
- Common causes include Faulty Key/Transmitter, Faulty Body Control Module (BCM).
- 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 B305C Buick Description
What are the Possible Causes of the DTC B305C Buick?
- Faulty Key/Transmitter
- Faulty Body Control Module (BCM)
How to Fix the DTC B305C Buick?
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 B305C Buick 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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Frequently Asked Questions about B305C Buick Code
1. What does the OBDII code B305C mean for a Buick?
The code B305C indicates that the immobilizer transponder of the wrong type has been programmed, preventing the vehicle from recognizing the key properly.
2. What are the common symptoms of the B305C code on a Buick?
Symptoms include the engine not starting, the security light staying illuminated, and the inability to program new keys.
3. What causes the B305C code on a Buick?
This code is typically caused by programming a key with an incompatible transponder type or using a faulty transponder in the key.
4. Can a dead or weak battery in the key fob trigger the B305C code?
No, this code specifically relates to the transponder type, not the battery in the key fob.
5. How do you fix the B305C code on a Buick?
The fix usually involves reprogramming the correct key or replacing the key with one that has the proper transponder type.
6. Can a locksmith resolve the B305C code issue on a Buick?
Yes, a qualified automotive locksmith can often reprogram or replace the key with the correct transponder type.
7. Is it safe to drive a Buick with the B305C code?
No, the vehicle will typically not start due to the immobilizer security system being activated.
8. Does replacing the ignition switch fix the B305C code on a Buick?
Not necessarily; the issue is related to the key's transponder type rather than the ignition switch itself.
9. How much does it cost to fix the B305C code on a Buick?
The cost varies depending on whether the key needs to be reprogrammed or replaced, typically ranging from $100 to $300.
10. Can the B305C code on a Buick be cleared without fixing the underlying issue?
Clearing the code without addressing the transponder mismatch will not resolve the problem, and the code will likely return.
Discuss the causes and fixes for B305C Buick OBDII Code
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