Volvo P0B4F00
*Update vehicle software as per TJ 31543, then load software product (SP): XC90/XC60: 31483293 S90/V90: 31682449 S90L: 31472419 S60/V60: 32267765 2019-07-19 Page 3 of 3 Technical J
Quick answer
For a U.S.-market 2016–2019 Volvo XC90, P0B4F00 is listed in Volvo Technical Journal (TJ) 33931 as a cell-balance diagnostic trouble code that may occur with other specified faults. The documented service action is a software update/load; the supplied evidence does not establish a component failure.
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 P0B4F00 mean?
For a U.S.-market 2016–2019 Volvo XC90, P0B4F00 is listed in Volvo Technical Journal (TJ) 33931 as a cell-balance diagnostic trouble code that may occur with other specified faults. The documented service action is a software update/load; the supplied evidence does not establish a component failure.
2. Technical explanation
NHTSA-published Volvo TJ 33931 identifies P0B4F00 among the cell-balance diagnostic trouble codes: P0B3B00, P0B4000, P0B4500, P0B4A00, P0B4F00, and P0B5400. The journal states that one or more of these codes may occur in combination with P0C7600 (System Discharge Time Too Long), P0CA400 (Charging Voltage High), or U029A00 (Lost Communication with Sensor Module). Volvo’s documented action is to update/load the specified software product.
3. What system is affected?
Not yet established by verified evidence. The verified journal classifies P0B4F00 within a group described as cell-balance diagnostic trouble codes.
4. How serious is this code?
Unknown. The supplied verified evidence does not provide a severity classification.
5. Symptoms you may notice
- P0B4F00 may be present with other specified cell-balance codes.
- The journal also addresses irregular or low electrical distance shown in the driver information module, but the evidence does not establish that this symptom occurs with P0B4F00 alone.
6. Possible causes
- Not yet established by verified evidence. Volvo TJ 33931 documents a software remedy but does not establish a specific physical root cause for P0B4F00.
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
- Arrange diagnosis and software-service review by a Volvo-authorized service provider.
- Do not attempt high-voltage battery or electrical repairs based on this code alone.
10. Step-by-step troubleshooting
- Confirm the stored diagnostic trouble codes and determine whether P0B4F00 is accompanied by P0C7600, P0CA400, U029A00, or another listed cell-balance code.
- Have the service provider check whether Volvo TJ 33931 and its specified software product apply to the vehicle.
11. When to contact service
Contact a Volvo-authorized service provider for diagnostic confirmation and software update applicability.
12. What the service center may check
- Confirm vehicle applicability: Volvo XC90, model years 2016–2019, U.S. market.
- Check for P0B4F00 and any related codes identified in TJ 33931.
- Verify the applicable software product and perform the documented software update/load through authorized service procedures.
13. Possible repair or resolution
- For XC90/XC60, TJ 33931 specifies software product 31483293.
- A software update/load is the documented service action in the supplied official communications.
- The supplied evidence does not establish that hardware replacement is required.
14. Affected vehicles
- Volvo XC90 · 2016–2019 · US
15. Related TSBs / service bulletins
- Volvo Technical Journal 33931, published through NHTSA as manufacturer communication MC-10234716-9999 (TJ33931c), dated September 18, 2018.
- Volvo Technical Journal 33931, published through NHTSA as manufacturer communication MC-10234715-9999 (TJ33931b), dated February 4, 2019.
16. Recall information
- Not yet established by verified evidence. No recall information was supplied.
17. Official manufacturer information
Official NHTSA-hosted Volvo communication: https://static.nhtsa.gov/odi/tsbs/2018/MC-10234716-9999.pdf
19. Frequently asked questions
Is P0B4F00 covered by Volvo TJ 33931?
Yes. TJ 33931 lists P0B4F00 among the cell-balance diagnostic trouble codes addressed by the journal.
What does Volvo specify as the service action for an applicable XC90?
TJ 33931 specifies updating/loading software product 31483293 for XC90/XC60.
Does this evidence prove the high-voltage battery needs replacement?
No. The supplied verified evidence documents a software action and does not establish a battery replacement requirement.
Can I continue driving or charging?
Not yet established by verified evidence. The supplied communications do not provide drive or charge authorization.