The Nissan P1615 trouble code indicates a problem with the vehicle’s NATS (Nissan Anti-Theft System). Specifically, it signifies a key ID verification failure between the key and the Body Control Module (BCM). While the BCM receives the key ID signal, the verification process results in a “NG” (No Good) status. This article will explore the potential causes of this error code and discuss possible solutions.
Decoding the P1615 Code: Key ID Verification Failure
When a Nissan key is inserted into the ignition, it transmits a unique identification signal to the BCM. The BCM compares this signal to its stored list of valid keys. If the signals match, the vehicle starts. However, if there’s a mismatch or the BCM cannot properly verify the key, the P1615 code is triggered, preventing the engine from starting. A common misconception is that simply replacing the key will resolve the issue. While a faulty key can be the culprit, programming a new key often doesn’t rectify the underlying problem if the issue lies with the BCM itself.
Potential Causes of the Nissan P1615 Code
Several factors can contribute to a P1615 error code.
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Faulty BCM: A malfunctioning BCM is a primary suspect. Internal errors or damage can prevent it from correctly processing the key ID signal. Nissan has issued Technical Service Bulletin (TSB) NTB02-071B, which addresses specific NATS-related concerns, potentially including issues related to the BCM.
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Wiring Issues: Damaged or corroded wiring within the NATS system can disrupt communication between the key, ignition switch, and the BCM, leading to a verification failure.
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Low Battery Voltage: In some cases, a weak or dying battery can cause erratic behavior in the vehicle’s electrical systems, including the NATS, triggering the P1615 code.
Diagnosing and Resolving the P1615 Issue
Diagnosing the root cause of the P1615 code requires specialized diagnostic equipment, such as a Consult II scanner. This tool allows technicians to communicate with the BCM and retrieve detailed diagnostic information.
Dealerships often charge a diagnostic fee to pinpoint the problem. While replacing the BCM might resolve the issue, it’s a costly repair. It is advisable to first inspect the related wiring and ensure the battery is in good working order before opting for BCM replacement.
BCM Replacement: Dealer vs. DIY
Replacing the BCM is a complex procedure that requires specialized knowledge and tools. While technically possible to replace it yourself, it’s generally recommended to have a qualified Nissan technician perform the replacement and programming to ensure proper functionality and avoid potential complications. Locating a used BCM from a salvage yard might be challenging, especially for specific models like the 350Z.
Conclusion
The Nissan P1615 code indicates a critical malfunction within the NATS system. While a faulty key might seem like the obvious culprit, the issue often stems from a more complex problem with the BCM or related wiring. Thorough diagnosis with a Consult II scanner is crucial to accurately identify the source of the problem and determine the appropriate course of action. Given the complexity of the NATS system, consulting with a qualified Nissan technician is strongly recommended for diagnosis and repair.
