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Volvo P0A1B47

If above Diagnostic Trouble Codes (DTCs) are set, follow advice under “Service”. ERAD=Electric Rear Axle Drive IEM = Inverter ERAD Module SERVICE: Revised IEM software has been rel

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService is recommended because Volvo Technical Journal 33723.1.0 gives a specific software-upgrade and post-test procedure for this code.
Confidence95%

Quick answer

For verified Volvo applicability, P0A1B47 is listed as an intermittent fault in the IEM (Inverter ERAD Module). Volvo Technical Journal 33723 states that revised IEM software was released and directs an upgrade according to TJ 31543, followed by vehicle testing and checking whether the DTC returns.

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 P0A1B47 mean?

For verified Volvo applicability, P0A1B47 is listed as an intermittent fault in the IEM (Inverter ERAD Module). Volvo Technical Journal 33723 states that revised IEM software was released and directs an upgrade according to TJ 31543, followed by vehicle testing and checking whether the DTC returns.

2. Technical explanation

ERAD means Electric Rear Axle Drive and IEM means Inverter ERAD Module. In Volvo Technical Journal 33723.1.0, P0A1B47 is listed under control module IEM with fault type “Intermittent.” The supplied evidence does not establish a more specific component-level fault meaning for this code.

3. What system is affected?

IEM (Inverter ERAD Module) / ERAD (Electric Rear Axle Drive).

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • The supplied Volvo technical-journal evidence references front/rear axle unusual noise and front/rear axle vibration/shake, but does not establish that either symptom is present whenever P0A1B47 is stored.

6. Possible causes

  • An intermittent IEM-related condition is established by Volvo Technical Journal 33723.1.0.
  • The supplied evidence states that revised IEM software has been released.
  • Any further root cause is 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

  • Arrange diagnosis by a Volvo retailer or qualified service facility.
  • Provide the stored code P0A1B47 and reference Volvo Technical Journal 33723.1.0.
  • Do not attempt high-voltage or inverter repair procedures.

10. Step-by-step troubleshooting

  1. Verify whether P0A1B47 is stored in the IEM and whether it is intermittent.
  2. Follow the Volvo service direction in Technical Journal 33723.1.0: perform the IEM software upgrade according to TJ 31543.
  3. Test the vehicle after the software upgrade and check whether the DTC returns.

11. When to contact service

Service is recommended because Volvo Technical Journal 33723.1.0 gives a specific software-upgrade and post-test procedure for this code.

12. What the service center may check

  • Confirm the diagnostic code and its intermittent status in the IEM.
  • Check applicability of the revised IEM software procedure referenced as TJ 31543.
  • Perform the specified software upgrade.
  • Test the vehicle and check whether the DTC returns.

13. Possible repair or resolution

  • The verified Volvo service direction is an IEM software upgrade according to TJ 31543, followed by testing and checking whether the DTC returns.
  • Whether this resolves an individual vehicle is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Volvo Technical Journal 33723.1.0, published May 8, 2018; NHTSA Manufacturer Communication 10149954: https://static.nhtsa.gov/odi/tsbs/2018/MC-10149954-9999.pdf
  • Volvo Technical Journal 33723.1.0, published May 15, 2018; NHTSA Manufacturer Communication 10164136: https://static.nhtsa.gov/odi/tsbs/2018/MC-10164136-9999.pdf
  • The journal lists P0A1B47 as intermittent in the IEM and refers to TJ 31543 for the software upgrade.

16. Recall information

  • No recall information was supplied or established by verified evidence.

17. Official manufacturer information

Verified applicability: US-market 2017–2018 Volvo S90, XC60, and XC90. The supplied official NHTSA-hosted Volvo communications identify P0A1B47 as an intermittent IEM code and provide the software-service direction.

19. Frequently asked questions

What does P0A1B47 indicate in the supplied Volvo evidence?

It is listed as an intermittent DTC in the IEM, the Inverter ERAD Module.

What does Volvo direct technicians to do?

Technical Journal 33723.1.0 directs an IEM software upgrade according to TJ 31543, then a vehicle test and a check for DTC return.

Which vehicles are verified as applicable?

US-market 2017–2018 Volvo S90, XC60, and XC90.

Is it safe to drive or charge?

Not yet established by verified evidence.

20. Sources & verification

Verified
Volvo P0A1B47: If above Diagnostic Trouble Codes (DTCs) are set,… | EV Diagnostics