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P1698 Hyundai Code - Key ID Not Valid

Quick Answer

The P1698 Hyundai diagnostic trouble code (DTC) refers to "Key ID Not Valid." This code indicates that the key being used to start the vehicle is not recognized by the vehicle's immobilizer system. Common causes include Damaged or malfunctioning transponder chip: If the transponder chip in the key is damaged or not functioning correctly, the immobilizer system may not recognize it as a valid key, Key programming issues: If the key has not been programmed correctly to communicate with the vehicle's immobilizer system, it may trigger the key ID not valid code, Faulty immobilizer system: A malfunctioning immobilizer system can also lead to this issue, as it may not be able to properly read the key's transponder chip. 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
P1698 Hyundai indicates Key ID Not Valid.
Common causes
Common causes include Damaged or malfunctioning transponder chip: If the transponder chip in the key is damaged or not functioning correctly, the immobilizer system may not recognize it as a valid key, Key programming issues: If the key has not been programmed correctly to communicate with the vehicle's immobilizer system, it may trigger the key ID not valid code, Faulty immobilizer system: A malfunctioning immobilizer system can also lead to this issue, as it may not be able to properly read the key's transponder chip.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P1698 Hyundai Description

The P1698 Hyundai diagnostic trouble code (DTC) refers to "Key ID Not Valid." This code indicates that the key being used to start the vehicle is not recognized by the vehicle's immobilizer system. The immobilizer system is a security feature in modern vehicles that prevents the engine from starting unless the correct key or key fob is present. When the key ID is not valid, the system will not allow the engine to start, leaving the vehicle immobilized.

OBDII Code P1698 Hyundai - Key ID Not Valid
P1698 Hyundai Code - Key ID Not Valid

Common Causes of P1698 Hyundai

  1. Damaged or malfunctioning transponder chip: If the transponder chip in the key is damaged or not functioning correctly, the immobilizer system may not recognize it as a valid key.
  2. Key programming issues: If the key has not been programmed correctly to communicate with the vehicle's immobilizer system, it may trigger the key ID not valid code.
  3. Faulty immobilizer system: A malfunctioning immobilizer system can also lead to this issue, as it may not be able to properly read the key's transponder chip.
  4. Low battery in key fob: If the battery in the key fob is low or dead, it may not be able to communicate with the vehicle's immobilizer system, triggering the code.

Symptoms of P1698 Hyundai

  1. Engine cranks but does not start: When the key ID is not valid, the engine may crank but will not start, as the immobilizer system prevents fuel and ignition systems from functioning.
  2. Security light flashing: Some vehicles have a security light on the dashboard that will flash when there is an issue with the immobilizer system, indicating a key ID not valid.
  3. Inability to start the engine: The most obvious symptom of this issue is the inability to start the vehicle, even after multiple attempts with the key.
  4. Engine stalling: In some cases, the engine may start but then stall shortly after due to the immobilizer system recognizing an invalid key.

How to Fix P1698 Hyundai

  1. Check key fob battery: Start by checking the battery in the key fob and replacing it if necessary.
  2. Reprogram key: If the key is not programmed correctly, it may need to be reprogrammed by a dealership or qualified technician.
  3. Replace key: If the transponder chip in the key is damaged, it may need to be replaced with a new key.
  4. Immobilizer system diagnosis: If none of the above steps resolve the issue, the immobilizer system itself may need to be diagnosed and repaired by a professional technician.

Cost to Fix P1698 Hyundai

The cost of repairing a P1698 Hyundai Key ID Not Valid issue can vary depending on the specific cause of the problem. Replacing a key fob battery can cost around $5-$20, while reprogramming a key may range from $50-$150. If a new key is needed, it can cost anywhere from $50-$250, depending on the vehicle make and model. If the immobilizer system needs to be diagnosed and repaired, the cost can range from $100-$500 or more, depending on the extent of the issue. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for more precise estimates.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1698 Hyundai Code

1. What does the OBDII code P1698 mean on a Hyundai?

The P1698 code indicates "Key ID Not Valid," meaning the immobilizer system cannot recognize the key's ID, preventing the engine from starting.

2. What are the common symptoms of code P1698 on a Hyundai?

Symptoms include difficulty starting the engine, the immobilizer warning light on the dashboard, and possible inability to start the vehicle.

3. What causes the P1698 code to appear on a Hyundai?

Common causes include a faulty key fob, a damaged or malfunctioning immobilizer system, wiring issues, or a problem with the vehicle's ECU.

4. Can a dead key fob battery trigger code P1698?

Yes, a dead or weak key fob battery can prevent the immobilizer system from recognizing the key's ID, triggering the P1698 code.

5. How do I fix the P1698 code on a Hyundai?

Start by checking the key fob battery and replacing it if necessary. If the problem persists, inspect the immobilizer system, wiring, and ECU for faults.

6. Can a damaged transponder in the key cause code P1698?

Yes, a damaged or faulty transponder chip in the key can lead to the immobilizer not recognizing the key, resulting in the P1698 code.

7. Is it safe to drive with the P1698 code on a Hyundai?

No, the P1698 code typically prevents the vehicle from starting, so it must be resolved to drive the car.

8. How can a mechanic diagnose the P1698 code on a Hyundai?

A mechanic will use a diagnostic scanner to confirm the code, inspect the key fob, immobilizer system, and wiring, and test the ECU for proper function.

9. Can reprogramming the key fix the P1698 code on a Hyundai?

Yes, if the key has lost synchronization with the immobilizer system, reprogramming the key may resolve the issue.

10. How much does it cost to fix the P1698 code on a Hyundai?

The repair cost varies depending on the issue, ranging from $50 for a key fob battery replacement to $200–$500 for immobilizer or ECU repairs.

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