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P1611 Infiniti Code - Key ID Discord IMM-ECM

Quick Answer

The P1611 code for Infiniti vehicles indicates a Key ID Discord between the immobilizer module (IMM) and the engine control module (ECM). Common causes include Faulty key transponder: The key transponder may be malfunctioning, causing a communication error with the ECM, Immobilizer system malfunction: Issues with the immobilizer system, such as wiring problems or a faulty antenna ring, can trigger this code, ECM malfunction: A problem with the ECM, such as a software glitch or hardware failure, can lead to a key ID discord. 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
P1611 Infiniti indicates Key ID Discord IMM-ECM.
Common causes
Common causes include Faulty key transponder: The key transponder may be malfunctioning, causing a communication error with the ECM, Immobilizer system malfunction: Issues with the immobilizer system, such as wiring problems or a faulty antenna ring, can trigger this code, ECM malfunction: A problem with the ECM, such as a software glitch or hardware failure, can lead to a key ID discord.
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 08, 2024
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Code P1611 Infiniti Description

The P1611 code for Infiniti vehicles indicates a Key ID Discord between the immobilizer module (IMM) and the engine control module (ECM). In simpler terms, there is a communication issue between the key and the vehicle's computer system. The key ID is used as a security measure to prevent unauthorized starting of the vehicle. When this code is triggered, it can lead to difficulties starting the vehicle or even cause it to stall while driving.

OBDII Code P1611 Infiniti - Key ID Discord IMM-ECM
P1611 Infiniti Code - Key ID Discord IMM-ECM

Common Causes of P1611 Infiniti

  1. Faulty key transponder: The key transponder may be malfunctioning, causing a communication error with the ECM.
  2. Immobilizer system malfunction: Issues with the immobilizer system, such as wiring problems or a faulty antenna ring, can trigger this code.
  3. ECM malfunction: A problem with the ECM, such as a software glitch or hardware failure, can lead to a key ID discord.
  4. Low battery voltage: Low voltage in the vehicle's battery can disrupt the communication between the key and the ECM.

Symptoms of P1611 Infiniti

  1. Difficulty starting the vehicle: The engine may crank but not start due to the key ID discord issue.
  2. Engine stalling: The vehicle may stall unexpectedly while driving, posing a safety risk.
  3. Loss of power: The engine may experience a loss of power, affecting the vehicle's performance.
  4. Warning lights: The Check Engine Light or Immobilizer Light may illuminate on the dashboard.

How to Fix P1611 Infiniti

  1. Check key functionality: Test the key transponder to ensure it is transmitting the correct signal.
  2. Inspect immobilizer system: Check the wiring and components of the immobilizer system for any faults or damage.
  3. Scan ECM for error codes: Use a diagnostic scanner to read the error codes stored in the ECM and pinpoint the exact cause of the key ID discord.
  4. Reset immobilizer system: Reset the immobilizer system to recalibrate the communication between the key and the ECM.
  5. Replace key or ECM: If necessary, replace the faulty key or ECM to resolve the key ID discord issue.

Cost to Fix P1611 Infiniti

The cost of repairing a P1611 code on an Infiniti vehicle can vary depending on the specific cause of the issue. On average, the repair costs for this issue can range from $150 to $500, including parts and labor. However, it is essential to note that the actual cost can be higher or lower based on the location, vehicle model, and the extent of the repairs needed. It's recommended to consult with a certified mechanic to get an accurate estimate for the repair. Labor rates at auto repair shops typically range from $80 to $150 per hour.

What does this mean?

Tech Notes for P1611 Infiniti

This code is usually triggered when a not registered or damaged key is used to start the engine. When the starting operation is carried out five or more times consecutively with the same unregistered key, the system will lock.

If the problem occurs try disconnecting the car battery for about 30 minutes and then try starting the engine with a known registered key. If the problem persists you have to have the dealer erase the code and reprogram the keys again.





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When is the Code Detected?

The result of ID verification between immobilizer system unit and Engine Control Model (ECM) is negative. System initialization is required.

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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.

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