The Nissan trouble code P1615 indicates a problem with the vehicle’s NATS (Nissan Anti-Theft System). Specifically, P1615 signifies a “Difference of Key NATS Malfunction.” This means the Body Control Module (BCM) receives the key ID signal, but verification between the key ID and the BCM fails. This can prevent the engine from starting or cause other operational issues.
Decoding the P1615 Code and its Implications
When a Nissan vehicle displays the P1615 code, it signifies that the BCM is detecting a mismatch between the key being used and the registered keys in the system. While a new key programmed by a Nissan dealer might seem like the solution, it doesn’t always resolve the underlying problem. Sometimes, the issue lies within the BCM itself, potentially requiring replacement.
Troubleshooting Steps for the P1615 Code
Nissan has issued a Technical Service Bulletin (TSB NTB02-071B) that addresses some known issues with the NATS system, which may be related to the P1615 code. Consulting this document might provide valuable insights into potential solutions.
One possible solution, as suggested by the original poster, is replacing the BCM. However, this is a complex procedure that requires specialized tools and knowledge. It’s crucial to confirm that the BCM is indeed faulty before undertaking this repair.
BCM Replacement: Dealer vs. DIY
Replacing the BCM is generally recommended to be performed by a qualified Nissan technician. The process involves programming the new BCM to the vehicle, which requires specialized equipment (Consult II or similar). While technically possible to replace the BCM yourself, the programming aspect necessitates dealer involvement or access to professional-grade diagnostic tools.
Locating a Replacement BCM
Finding a replacement BCM for a 2003 Nissan 350Z can be challenging. Junkyards may not always have 350Zs available, especially in certain regions. Contacting specialized parts suppliers or exploring online marketplaces dedicated to Nissan parts might be more fruitful. Ensure compatibility before purchasing a used BCM.
Conclusion: Addressing the Nissan P1615 Issue
The Nissan P1615 code points to a problem within the NATS system, often related to key recognition or a malfunctioning BCM. While a new programmed key might solve the problem in some cases, a faulty BCM often requires replacement by a qualified technician due to the necessary programming involved. Consulting the relevant TSB and exploring specialized parts suppliers can aid in resolving this issue.
