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Volvo P0A1B62

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 appropriate because the verified Volvo communication specifies an IEM software upgrade and post-upgrade test/check procedure.
Confidence95%

Quick answer

For verified Volvo applicability, P0A1B62 is listed as an intermittent DTC 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 testing and checking whether listed DTCs return.

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 P0A1B62 mean?

For verified Volvo applicability, P0A1B62 is listed as an intermittent DTC 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 testing and checking whether listed DTCs return.

2. Technical explanation

ERAD means Electric Rear Axle Drive, and IEM means Inverter ERAD Module. In Volvo Technical Journal 33723, P0A1B62 is listed under the IEM with fault type “Intermittent.” The journal’s service direction for the listed DTCs is revised IEM software, upgraded according to TJ 31543, then vehicle testing and a check for returning DTCs.

3. What system is affected?

Electric Rear Axle Drive (ERAD), specifically the Inverter ERAD Module (IEM).

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • An intermittent IEM DTC P0A1B62 may be stored. No driver-observable symptoms are established by the verified evidence.

6. Possible causes

  • The verified Volvo communication identifies P0A1B62 as an intermittent IEM DTC and states that revised IEM software has been released. A specific underlying root cause is not otherwise 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 or service with a Volvo-authorized service provider.
  • Provide the service provider with DTC P0A1B62 and reference Volvo Technical Journal 33723.
  • Do not attempt high-voltage or inverter repair procedures yourself.

10. Step-by-step troubleshooting

  1. Use appropriate Volvo diagnostic procedures to confirm whether P0A1B62 is present in the IEM.
  2. Follow the service direction in Technical Journal 33723: upgrade IEM software according to TJ 31543.
  3. Test the vehicle after the software upgrade and check whether P0A1B62 or the other listed DTCs return.

11. When to contact service

Service is appropriate because the verified Volvo communication specifies an IEM software upgrade and post-upgrade test/check procedure.

12. What the service center may check

  • Confirm P0A1B62 in the IEM.
  • Upgrade IEM software according to TJ 31543.
  • Test the vehicle.
  • Check whether the listed DTCs return after the upgrade.

13. Possible repair or resolution

  • Volvo Technical Journal 33723 directs installation of revised IEM software according to TJ 31543, followed by testing and checking for returning DTCs.
  • Further repair if the DTC returns is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Volvo Technical Journal 33723, version 1.0, dated May 8, 2018. NHTSA manufacturer communications: MC-10149954-9999 and MC-10164136-9999.
  • The journal lists P0A1B62 as intermittent in the IEM and states that revised IEM software has been released.
  • Source: https://static.nhtsa.gov/odi/tsbs/2018/MC-10149954-9999.pdf

16. Recall information

  • No recall information is established by the supplied verified evidence.

17. Official manufacturer information

Official NHTSA-hosted Volvo manufacturer communication: Technical Journal 33723.1.0. It applies in the supplied evidence to certain U.S. 2017–2018 Volvo S90, XC60, and XC90 vehicles.

19. Frequently asked questions

What does P0A1B62 mean in the supplied Volvo evidence?

It is listed as an intermittent diagnostic trouble code in the IEM, the Inverter ERAD Module.

What does Volvo direct for P0A1B62?

Technical Journal 33723 directs an IEM software upgrade according to TJ 31543, then vehicle testing and a check for returning DTCs.

Is P0A1B62 a recall?

No recall is established by the supplied verified evidence.

Can the vehicle be driven or charged with P0A1B62?

Drive and charging suitability are not yet established by verified evidence.

20. Sources & verification

Verified
Volvo P0A1B62: If above Diagnostic Trouble Codes (DTCs) are set,… | EV Diagnostics