Nissan B2631
OK 24/27 NTB18-039 47. Select Back . Figure 40 48. Using the arrow keys, go to Page 3/3, and then select MULTI AV. Figure 41 Step 47 Page 3/3 Arrow keys Select MULTI AV 25/27 NTB18
Quick answer
For applicable 2016–2017 Nissan Leaf vehicles in the US, official Nissan bulletin NTB18-039 states that if DTC B2631 (SUNLOAD SENSOR) sets again, this is okay. The supplied evidence does not establish a fault diagnosis, driving restriction, charging restriction, or repair requirement for B2631.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does B2631 mean?
For applicable 2016–2017 Nissan Leaf vehicles in the US, official Nissan bulletin NTB18-039 states that if DTC B2631 (SUNLOAD SENSOR) sets again, this is okay. The supplied evidence does not establish a fault diagnosis, driving restriction, charging restriction, or repair requirement for B2631.
2. Technical explanation
Verified evidence identifies B2631 as “SUNLOAD SENSOR” in Nissan bulletin NTB18-039. In the bulletin’s described diagnostic-tool procedure, Nissan instructs technicians to erase HVAC DTCs and notes: “If DTC B2631 (SUNLOAD SENSOR) sets again, this is okay.” The supplied evidence does not provide the complete DTC definition, setting conditions, circuit diagnosis, component test, or repair criteria.
3. What system is affected?
HVAC is referenced in the verified bulletin procedure. The code is identified there as related to the SUNLOAD SENSOR.
4. How serious is this code?
Unknown. Not yet established by verified evidence.
5. Symptoms you may notice
Not yet established by verified evidence.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Have a Nissan-qualified service provider assess the vehicle if there are customer concerns or additional warning indicators.
- Do not treat B2631 reappearing after erasure, by itself, as a confirmed failure based on the supplied bulletin evidence.
10. Step-by-step troubleshooting
- Verified bulletin procedure: access the HVAC system with the diagnostic tool, erase DTCs, and execute the erase command.
- The bulletin states that B2631 (SUNLOAD SENSOR) setting again is okay.
- Further troubleshooting steps, test values, and diagnostic criteria are not yet established by verified evidence.
11. When to contact service
Service need is unknown. Seek Nissan service evaluation if the vehicle has symptoms, warning messages, or other DTCs; the supplied evidence does not establish that B2631 alone requires repair.
12. What the service center may check
- Use the HVAC diagnostic-tool function referenced in Nissan bulletin NTB18-039.
- Erase HVAC DTCs as described in the bulletin.
- Recognize Nissan’s bulletin note that a recurring B2631 (SUNLOAD SENSOR) code is okay in that procedure.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Nissan Leaf · 2016–2017 · US
15. Related TSBs / service bulletins
- Nissan NTB18-039, published June 5, 2018 and available through NHTSA manufacturer communications (MC-10143272 and MC-10143483). Verified excerpt: “If DTC B2631 (SUNLOAD SENSOR) sets again, this is okay.”
- Applicability supplied with this record: 2016–2017 Nissan Leaf, US.
16. Recall information
- No recall information was supplied or established by verified evidence.
17. Official manufacturer information
Official source: NHTSA-hosted Nissan manufacturer communication NTB18-039: https://static.nhtsa.gov/odi/tsbs/2018/MC-10143272-9999.pdf
19. Frequently asked questions
What does B2631 refer to in the supplied Nissan evidence?
The verified bulletin identifies B2631 as “SUNLOAD SENSOR.”
Is it normal for B2631 to return after it is erased?
In Nissan bulletin NTB18-039, the note states that if B2631 (SUNLOAD SENSOR) sets again, this is okay.
Does B2631 mean the vehicle is unsafe to drive or charge?
Not yet established by verified evidence.
Does B2631 require a sensor replacement?
Not yet established by verified evidence.