P1614 Nissan Code: Causes And Solutions Of NATS Issues (2024)

Hello, fellow Nissan enthusiasts! Are you stumped by the P1614 code?

It can be a real head-scratcher but don’t worry – as an experienced mechanic and lover of all things Nissan, I’m here to help.

In this blog post, we’ll take a closer look at the P1614 Nissan code and what it means for your vehicle. We’ll cover everything from the symptoms to the solutions, so grab a cup of coffee and let’s dive in!

P1614 Nissan: A Quick Overview

Below is a summary of the P1614 Nissan code. Check it out!

• Definition: Chain of IMMU-KEY
• Severity: Medium
• DIY Skill Level: Intermediate
• Continue To Drive?: No
• Estimated Repair Cost: $100 – $500

What Does The P1614 Code Mean On Nissan?

The P1614 trouble code on Nissan vehicles is a signal of a communication issue between the key and the engine immobilizer in the Nissan Anti-Theft System (NATS). Specifically, this code indicates a chain of IMMU-KEY errors, as explained by Nissan in a technical document used for advanced diagnostics that “IMMU cannot receive key ID & Dongle unit is malfunctioning (IF FITTED).”

The NATS or Nissan Vehicle Immobilizer System (NVIS) is an integrated anti-theft system designed to prevent the unauthorized starting of the engine. This system works through the cooperation between the key, engine control module (ECM), and immobilizer control unit (IMMU). The IMMU is responsible for validating the key and sending a signal to the ECM to allow the engine to start. If the IMMU detects an issue with the key or the signal, it will set the P1614 code. Other codes related to the Nissan anti-theft system, such as P1610 (Lock Mode), P1615 (Difference of Key), and P1612 (Chain of ECM-IMMU), can also be triggered alongside the P1614 code.

Is the P1614 Nissan Code Serious?

The P1614 code in Nissan vehicles is a moderately severe issue that should be addressed as soon as possible. While it may not have immediate consequences, neglecting the issue could lead to potential problems down the line.

Regarding driving with the P1614 code, it is not recommended. This is because the code is often related to the vehicle’s immobilizer system, which could prevent the car from starting or operating properly. Attempting to drive the vehicle with this code active could cause further damage, resulting in costly repairs.

What Are The Warning Signs of the P1614 Nissan Code?

Here are some warning signs that you may encounter if the P1614 code is triggered:

• Car starting issues such as engine cranking but not starting, engine starting, and then stalling. This is because the immobilizer system is preventing the engine from starting without a properly registered key.
• Immobilizer warning lights
• Illuminated check engine light

What Causes the P1614 Nissan Code?

There are several possible causes of the P1614 code on Nissan vehicles:

• Damaged, not programmed, improperly registered NATS ignition key
• Dead or low battery in the key fob
• Failed NATS (especially NATS antenna)
• Faulty IMMU or BCM
• Faulty ECM (in rare cases)

How To Diagnose and Fix The P1614 Nissan Code?

If your Nissan is displaying the P1614 code, it’s crucial to address the issue promptly to ensure the proper functioning of your vehicle’s immobilizer system. Fortunately, there are several steps you can take to diagnose and fix the problem, as below. Let’s explore!

Tip: If you see the P1614 error code along with the P1610 code, it’s important to escape from the lock mode. So how to do it? First, turn the key to the “ON” position and wait for the security light to turn off. Then, turn the key to the “OFF” position. Next, repeat this process for a total of three cycles.

Essential Tools and Parts

• Diagnostic scanner
• Car key programmer
• Nissan key fob battery
• Key fob transponder chip
• NATS antenna

Step-by-step Procedure

Step 1: Use a diagnostic scanner to retrieve any trouble codes that may be present. This can help identify any related issues that may be contributing to the P1614 code.

Step 2: Check that you are using the correct key for your Nissan. Make sure it is not damaged or worn out. Sometimes you might find a damaged transponder chip inside the key. If you have a spare key, try using it to determine if the error code still appears.

Note: I always recommend testing the key using a car key programmer/tester to be sure. Sometimes, I’ve found that a faulty ignition switch coil can cause the engine not to start and trigger the P1614 code. In these cases, the key test tool may detect the issue. If the ignition switch coil is found to be faulty, I replace it and test again to see if the problem is resolved.

Step 3: Check the condition of the key fob’s battery. If it’s weak or dead, communication issues between the key and the IMMU might occur. Replace the battery if necessary.

Step 4: Reset the immobilizer system by disconnecting the battery for several minutes, then reconnecting it.

Step 5: Inspect the NATS antenna operation. Replace it if necessary by following the steps in the service manual.

Step 6: If the above steps do not resolve the issue, reprogramming the key to the vehicle’s IMMU system may be necessary. To ensure proper reprogramming, it’s best to seek the help of a qualified automotive locksmith or a Nissan dealership as they have the necessary expertise and equipment.

Step 7: If the issue still persists, there may be a problem with the IMMU system itself. As dealing with this system is a complex task, it is advisable to leave it to your nearest Nissan dealership or a certified mechanic with experience in Nissan vehicles. If the issue is determined to be with the BCM, it may need to be reprogrammed.

Estimated Repair Costs for P1614 Code in Nissan Vehicles

While DIYers can do some of the steps outlined above with some automotive experience, it’s important to recognize when a repair is beyond your skill level and seek assistance from a qualified professional. In particular, tasks such as replacing the NATS antenna or reprogramming the key or BCM require specialized equipment and knowledge and can be costly if done incorrectly.

The estimated repair costs for these steps can vary widely, as shown in the table below. It’s important to be prepared for some variation in repair costs, depending on the specific task and where you have it done.

P1614 Nissan Infographic

Final Thoughts

We hope this article has provided valuable insights into the P1614 Nissan code. Remember, working with the immobilizer system can be complex. Therefore, if you’re not confident in automotive repairs, it’s always best to seek assistance from a professional to avoid causing further damage. Additionally, always follow the manufacturer’s instructions and safety protocols when working on your vehicle.

If you have any questions or comments, feel free to leave them below. And if you found this article helpful, please share it with your fellow Nissan enthusiasts. Safe driving!

References Sources

1. Nissan Manual for Advanced Diagnostics
2. Nissan North America (2005), Technical Service Bulletin: Campaign – ECM reprogramming for engine misfire diagnostic trouble codes (DTC P0300-P0306).