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Volvo left turn signal malfunction

left turn signal malfunction

DriveUnknown. The supplied verified evidence does not establish whether driving is safe with this alert.
ChargeUnknown. The supplied verified evidence does not establish whether charging is safe with this alert.
ServiceContact a Volvo service provider for diagnosis, particularly if the message is recurring. The supplied evidence does not establish urgency or a mandatory service requirement.
Confidence90%

Quick answer

For a 2024 Volvo XC40 in the US, an intermittent Driver Information Module (DIM) message saying “left turn signal malfunction” is documented in Volvo Technical Journal 36944 when DTC CEM B124713 or CEM B124813 is also set. The supplied evidence does not establish whether the vehicle is safe to drive or charge, or whether service is required.

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 left turn signal malfunction mean?

For a 2024 Volvo XC40 in the US, an intermittent Driver Information Module (DIM) message saying “left turn signal malfunction” is documented in Volvo Technical Journal 36944 when DTC CEM B124713 or CEM B124813 is also set. The supplied evidence does not establish whether the vehicle is safe to drive or charge, or whether service is required.

2. Technical explanation

Verified Volvo technical-journal evidence describes an intermittent DIM message, “left turn signal malfunction,” in combination with CEM diagnostic trouble code B124713 or CEM B124813. CEM means Central Electrical Module and DIM means Driver Information Module. The journal directs technicians to follow its Service advice, but the supplied evidence does not include that advice or a confirmed root cause.

3. What system is affected?

Side indicator lamp function; the documented modules are the Central Electrical Module (CEM) and Driver Information Module (DIM).

4. How serious is this code?

Unknown. The diagnostic record lists severity as unknown.

5. Symptoms you may notice

  • Intermittent DIM message stating “left turn signal malfunction.”
  • The documented condition is associated with CEM B124713 or CEM B124813.

6. Possible causes

  • Not yet established by verified evidence.

7. Can I still drive the vehicle?

Unknown. The supplied verified evidence does not establish whether driving is safe with this alert.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not establish whether charging is safe with this alert.

9. What you can safely do

  • Arrange assessment by a Volvo service provider if the warning is present or recurring.
  • Provide the technician with the exact DIM message and whether it is intermittent.
  • Do not attempt electrical-module or high-voltage repairs based on this information.

10. Step-by-step troubleshooting

  1. A technician can check whether CEM B124713 or CEM B124813 is stored in connection with the intermittent DIM message.
  2. The supplied technical-journal evidence directs technicians to follow the journal’s Service advice; that procedure was not included in the supplied evidence.

11. When to contact service

Contact a Volvo service provider for diagnosis, particularly if the message is recurring. The supplied evidence does not establish urgency or a mandatory service requirement.

12. What the service center may check

  • Confirm the reported DIM message: “left turn signal malfunction.”
  • Check for CEM DTC B124713.
  • Check for CEM DTC B124813.
  • Consult the latest online version of Volvo Technical Journal 36944, as referenced by the supplied NHTSA manufacturer communication.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied excerpts reference a Service procedure but do not provide the repair steps or resolution.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Volvo Technical Journal 36944 / NHTSA Manufacturer Communication 11014119: published January 27, 2025. It addresses an intermittent “left turn signal malfunction” DIM message with CEM B124713 or CEM B124813.
  • Volvo Technical Journal 36944.1.0 / NHTSA Manufacturer Communication 11006566: published June 27, 2024. It describes the same intermittent message and associated CEM codes.

16. Recall information

  • Not yet established by verified evidence. No recall information was supplied.

17. Official manufacturer information

Applicable verified evidence is for a 2024 Volvo XC40, US region. Official NHTSA-hosted manufacturer communications: https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11014119 and https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2020-2024.zip#nhtsa_id=11006566.

19. Frequently asked questions

What does “left turn signal malfunction” mean on a 2024 Volvo XC40?

Verified evidence documents it as an intermittent DIM message related to side indicator lamp function when CEM B124713 or CEM B124813 is set. A specific underlying failure is not established by the supplied evidence.

Which fault codes are documented with this message?

CEM B124713 and CEM B124813.

Is this covered by a recall?

Not yet established by verified evidence. No recall information was supplied.

Can I drive or charge the vehicle?

The supplied verified evidence does not establish whether the vehicle is safe to drive or charge with this alert.

20. Sources & verification

Verified
Volvo left turn signal malfunction: left turn signal malfunction | EV Diagnostics