P1679 Pontiac Code - Immobilizer Environment Identification Failed
Quick Answer
The P1679 Pontiac code indicates that the immobilizer environment identification has failed. Common causes include Faulty key or key fob, Damaged transponder antenna, Malfunctioning immobilizer module. 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
- P1679 Pontiac indicates Immobilizer Environment Identification Failed.
- Common causes
- Common causes include Faulty key or key fob, Damaged transponder antenna, Malfunctioning immobilizer module.
- 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 P1679 Pontiac Description
The P1679 Pontiac code indicates that the immobilizer environment identification has failed. In modern vehicles, an immobilizer system is designed to prevent unauthorized access to the vehicle by disabling the engine. The immobilizer system uses a transponder key or a key fob with a built-in chip that communicates with the vehicle's computer. When the key is inserted into the ignition, the immobilizer system verifies the key's unique code to allow the engine to start.
Common Causes of P1679 Pontiac
- Faulty key or key fob
- Damaged transponder antenna
- Malfunctioning immobilizer module
- Issue with the vehicle's computer system
Symptoms of P1679 Pontiac
- Engine cranks but does not start
- Engine starts but then stalls shortly after
- Immobilizer warning light illuminated on the dashboard
- Inability to start the engine despite using a valid key or key fob
How to Fix P1679 Pontiac
- Check the key or key fob for damage and replace if necessary.
- Inspect the transponder antenna for any physical damage and repair or replace as needed.
- Test the immobilizer module for proper functioning and replace if faulty.
- Diagnose the vehicle's computer system for any errors and reset or reprogram as required.
- Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.
Cost to Fix P1679 Pontiac
The cost of repairing a P1679 Pontiac code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. However, it's important to note that the actual cost may be higher or lower based on the factors mentioned earlier, such as location, vehicle make and model, and the expertise of the auto repair shop. It is recommended to consult with a qualified mechanic or dealership to get an accurate estimate for the repair.
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Frequently Asked Questions about P1679 Pontiac Code
1. What does the OBDII code P1679 mean for a Pontiac?
P1679 indicates an issue where the immobilizer system cannot properly identify the environment, often due to a communication error between the immobilizer and the engine control module (ECM).
2. What are the common symptoms of code P1679 in a Pontiac?
Symptoms include the engine not starting, a flashing or lit security light on the dashboard, and potential communication errors visible through a diagnostic scan.
3. What causes the P1679 code to appear in a Pontiac?
Common causes include a faulty immobilizer control module, damaged wiring or connectors in the immobilizer system, a failing ECM, or an issue with the key transponder.
4. Can a weak car battery trigger the P1679 code?
Yes, a weak or failing battery can cause voltage fluctuations that disrupt the immobilizer’s operation, potentially triggering this code.
5. How is the P1679 code diagnosed on a Pontiac?
A technician will use a diagnostic scanner to read the code, inspect the wiring and connectors in the immobilizer system, check the key transponder, and test communication between the ECM and immobilizer module.
6. Can I clear the P1679 code without fixing the issue?
Clearing the code may temporarily remove it, but if the underlying problem isn’t resolved, the code will reappear, and the vehicle might still refuse to start.
7. How can I fix the P1679 code on my Pontiac?
Repairs may include reprogramming or replacing the key, repairing or replacing damaged wiring, or replacing a faulty ECM or immobilizer control module.
8. Is the P1679 code specific to certain Pontiac models?
While it can occur in various Pontiac models equipped with immobilizer systems, the exact symptoms and solutions may differ slightly depending on the model and year.
9. Can a damaged key cause the P1679 code?
Yes, if the key's transponder is damaged or not recognized by the immobilizer, it can lead to a failure in environment identification and trigger the code.
10. How much does it cost to fix a P1679 code on a Pontiac?
The repair cost can vary widely, ranging from $100 for key reprogramming to over $1,000 if major components like the ECM or immobilizer module need replacement.
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