Jaguar XJ B1412-96 (2013-2018): The 'Do Nothing' Ghost Code Explained

What's Unique About the 2013-2018 Jaguar XJ

The Jaguar XJ (X351 platform) and other contemporary Jaguar/Land Rover models are unique regarding this code because the manufacturer has officially told its technicians to ignore it. Technical Service Bulletin SSM72302 was issued specifically to address this "ghost" code, stating it's a software error that falsely flags a problem. The bulletin's primary purpose is to prevent the unnecessary replacement of expensive electronic modules like the Gateway Module (e.g., part numbers DW93-14F681-AJ, AH2219H440AG) or the Quiescent Relay Box, which is often integrated into the Rear Junction Box.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle. 👇

Symptoms You May Notice

• No visible symptoms or warning lights on the dashboard.
• The code is only visible when scanning the vehicle's modules with a diagnostic tool.
• NOTE ON BATTERY DRAIN: While some owners report battery drain issues concurrently with this code, the TSB and expert consensus indicate B1412-96 itself does not cause a drain. A battery drain issue is a separate problem that requires its own diagnostic procedure, such as a parasitic draw test, 🎬 See how to perform a professional parasitic drain test on Jaguars. and should not be attributed to this specific ghost code.

Most Likely Causes

1. Software Glitch in Gateway Module (GWM) 🔴 High Probability This is a known issue documented by Jaguar in TSB SSM72302. The diagnostic software within the module incorrectly logs the fault. The TSB states it is a 'False log of DTC 1412-96 in the Gateway Module... due to internal software issues'.
   How to confirm: The presence of B1412-96 without any corresponding performance issues or actual faults in the quiescent power system confirms the TSB applies.
   Typical fix: No fix is required. The code should be ignored. Per the TSB, Jaguar intended to update its diagnostic software (SDD) to resolve the false logging, but the code itself requires no parts replacement. The TSB explicitly states the code may not clear.
   Est. part cost: $0

Diagnosis Steps

1. Scan the vehicle's computer systems with a high-end diagnostic tool capable of reading Jaguar-specific codes (e.g., JLR SDD/Pathfinder).
2. Confirm the presence of code B1412-96 in the Gateway Module (GWM).
3. Reference Jaguar TSB SSM72302, which identifies this as a false error.
4. Note the presence of the code and check for any other trouble codes. If other codes are present that relate to actual symptoms (like battery drain), diagnose those issues separately.
🎬 Watch: A real-world example of chasing difficult Jaguar parasitic draws.
5. Do not replace any parts based solely on the presence of B1412-96.
6. You can attempt to clear the code, but the TSB notes that it may not clear due to the nature of the software issue.

Technical Service Bulletins (TSBs) & Recalls

• SSM72302: States that B1412-96 is a false DTC logged in the Gateway Module due to a software issue and that no parts should be replaced. It applies to XJ (X351), F-Type (X152), XE (X760), and XF (X260) models.
• SSM72286: A similar bulletin for Land Rover models (including Range Rover L405, Evoque L538, Discovery Sport L550), also stating B1412-96 is a false log to be ignored, confirming the issue is widespread across the JLR family.

Platform-Specific Known Issues

• TSB SSM72302 documents that B1412-96 is a false error on 2013+ XJ models and should be ignored.
• The issue is related to the JLR Symptom Driven Diagnostics (SDD) software and how the Gateway Module logs codes. An update was planned but the core instruction remains to ignore the DTC.

Scan Tool Commands That Help

• JLR SDD / Pathfinder: Clear All DTCs — When attempting to clear the B1412-96 code after confirming no other symptoms are present. Be aware that the TSB explicitly states the code 'will not clear due to internal software issues' in some cases. A technician should not be alarmed if the code persists after a clear command; this is known behavior and does not indicate a hardware fault.
• JLR SDD / Pathfinder: Configure new module - Gateway module — This function is required if the Gateway Module is replaced (which should NOT be done for this code). This is a cautionary note: a used or new GWM is not plug-and-play and must be programmed to the vehicle's specific configuration. This adds significant cost and complexity to an unnecessary repair.

Wiring & Ground Locations

• Gateway Module (GWM) — In the trunk (boot), typically behind the left-side trim panel. It is a small black box with multiple large electrical connectors.. This is the module logging the false code. While there is no need to access it for B1412-96, knowing its location prevents a technician from wasting time searching for it. Visual inspection of the GWM or its connectors is not a valid diagnostic step for this specific software-based ghost code.
• Rear Junction Box (RJB) / Quiescent Relay Box — In the trunk (boot), located near the battery. It is the main rear fuse and relay panel.. The code description mentions the 'Quiescent Relay Box', which is integrated into this junction box. 🎬 Watch: Learn more about the Quiescent Relay Box and this code. The TSB warns not to replace it. A real fault in this box would likely cause definite battery drain or other electrical issues, which would be diagnosed separately from the incidental B1412-96 code.

Real Owner Repair Stories

• LandRoverForums.com user (2017 Land Rover Discovery 5 (L462)) — The owner performed several ECU updates to fix a separate diesel lag issue. After the updates, the vehicle ran perfectly, but a scan revealed the new DTC B1412-96. There were no symptoms associated with the code.
  ❌ Tried (didn't work) The owner was concerned and immediately began searching for the location and part number for the 'QCCM (quiescent current control module)', assuming it needed to be replaced.
  ✅ What actually fixed it The issue was resolved by understanding the nature of the code. The community and TSBs SSM72302/SSM72286 clarify that this is a false code that often appears after software updates or scans and should be ignored. The 'fix' was to stop pursuing a hardware replacement for a known software glitch.