P1679 Code - Immobilizer Environment Identification Failed
Quick Answer
The Engine Control Module (ECM), the Powertrain Interface Module (PIM), and the Body Control Module (BCM) are integral part of the vehicle theft deterrent system. Common causes include Deterrent key not programmed to vheicle, Faulty Deterrent key, Fualty ignition switch. 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 indicates Immobilizer Environment Identification Failed.
- Common causes
- Common causes include Deterrent key not programmed to vheicle, Faulty Deterrent key, Fualty ignition switch.
- 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 P1679 Description
1.When the ignition is turned ON or the door is unlocked by remote key the BCM and the key exchange security data to verify the correct key is used.
2.Once the correct key has been confirmed and the ignition is turned ON, the PIM and BCM exchange data to confirm the correct BCM and PIM is being used.
3.Once the correct key, BCM, and PIM is confirmed, the PIM and ECM exchange data to allow the vehicle to start.
4.The data exchange processes conducted use various encrypted data exchanges between each of the devices.
What are the Possible Causes of the DTC P1679?
- Deterrent key not programmed to vheicle
- Faulty Deterrent key
- Fualty ignition switch
- Poor electrical connection for Deterrent circuit components
How to Fix the DTC P1679?
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 P1679 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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Information for Specific Makes
- P1679 Audi — ETS Warning Lamp Open Circuit
- P1679 Buick — Immobilizer Environment Identification Failed
- P1679 Cadillac — Immobilizer Environment Identification Failed
- P1679 Chevrolet — Immobilizer Environment Identification Failed
- P1679 GMC — Immobilizer Environment Identification Failed
- P1679 Honda — RSCD Signal Circuit Malfunction
- P1679 Pontiac — Immobilizer Environment Identification Failed
- P1679 Saturn — Immobilizer Environment Identification Failed
- P1679 Volkswagen — ETS Warning Lamp Open Circuit
Frequently Asked Questions about P1679 Code
1. What are the common symptoms of OBDII code P1679 (Immobilizer Environment Identification Failed)?
The common symptoms of P1679 may include difficulty starting the vehicle, the engine not turning over, or the vehicle not starting at all.
2. What are the possible causes of OBDII code P1679?
Possible causes of P1679 include a faulty immobilizer system, issues with the key fob or key transponder, a malfunctioning Engine Control Module (ECM), or wiring problems.
3. How can I diagnose the OBDII code P1679?
Diagnosing P1679 typically involves using a scan tool to communicate with the vehicle's ECM and checking for any related trouble codes. A thorough inspection of the immobilizer system and key components may also be necessary.
4. Can I still drive my vehicle with OBDII code P1679?
It is not recommended to drive the vehicle with P1679 as the immobilizer system plays a crucial role in preventing unauthorized access to the vehicle. It's best to address the issue promptly.
5. How can I repair OBDII code P1679?
Repairing P1679 may involve reprogramming the key fob, replacing the key transponder, repairing wiring issues, or recalibrating the immobilizer system. In some cases, professional assistance may be required.
6. Are there any DIY tips for resolving OBDII code P1679?
While some simple troubleshooting steps like checking the key fob battery or ensuring a proper connection may help, resolving P1679 often requires specialized tools and expertise. It's advisable to consult a qualified mechanic.
7. How much does it cost to fix OBDII code P1679?
The cost of fixing P1679 can vary depending on the root cause of the issue, the extent of repairs needed, and labor rates in your area. It's recommended to obtain estimates from local repair shops.
8. Can a low car battery cause OBDII code P1679 to trigger?
A low car battery can sometimes lead to electrical issues that may trigger P1679. It's essential to ensure the car battery is in good condition and properly charged to rule out this possibility.
9. Is OBDII code P1679 a common issue in certain vehicle makes and models?
P1679 can occur in various vehicle makes and models equipped with an immobilizer system. However, its frequency may vary depending on the manufacturer and specific system design.
10. Can resetting the ECM clear OBDII code P1679?
Resetting the ECM may temporarily clear the code, but if the underlying issue causing P1679 is not addressed, the code is likely to reappear. It's crucial to diagnose and fix the root cause of the problem.
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