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Mazda U2142

00 (Communication error with microphone) will be cleared at this step. Page 5 of 6 12/19/2023 02:16 PM tlawrenc w. Check for DTCs with the

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService need is not yet established by verified evidence. Mazda service evaluation is appropriate if U2142:00 persists or returns, because the supplied evidence does not establish its underlying cause or repair.
Confidence95%

Quick answer

Verified Mazda service-bulletin evidence identifies U2142:00 as “Communication error with microphone.” The supplied evidence states that, if stored, this DTC is cleared after the vehicle is powered off, all doors are locked, and the vehicle remains undisturbed for 5 minutes or longer to enter sleep mode.

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 U2142 mean?

Verified Mazda service-bulletin evidence identifies U2142:00 as “Communication error with microphone.” The supplied evidence states that, if stored, this DTC is cleared after the vehicle is powered off, all doors are locked, and the vehicle remains undisturbed for 5 minutes or longer to enter sleep mode.

2. Technical explanation

U2142:00 is documented in the supplied official Mazda/NHTSA manufacturer-communication records as a communication error with the microphone. The supplied excerpts do not establish a component-level fault cause, diagnostic path, or repair beyond the noted clearing step after vehicle sleep mode.

3. What system is affected?

Microphone communication. A broader vehicle system assignment is not yet established by verified evidence.

4. How serious is this code?

Unknown. The supplied verified evidence does not provide a severity classification.

5. Symptoms you may notice

  • A communication error with the microphone is indicated by DTC U2142:00.
  • Additional customer-visible symptoms are 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

  • If U2142:00 is stored, the cited Mazda procedure states to turn the power off, lock all doors, and wait at least 5 minutes for the vehicle to enter sleep mode.
  • Have a Mazda service professional evaluate the vehicle if the code remains present or returns; further diagnosis is not provided in the supplied evidence.

10. Step-by-step troubleshooting

  1. Turn the vehicle power off.
  2. Lock all doors.
  3. Wait 5 minutes or more so the vehicle enters sleep mode.
  4. The supplied Mazda bulletin excerpts state that stored U2142:00 will be cleared at this step.
  5. Check for DTCs afterward using the applicable Mazda diagnostic procedure; the supplied evidence does not include the complete post-check procedure or results criteria.

11. When to contact service

Service need is not yet established by verified evidence. Mazda service evaluation is appropriate if U2142:00 persists or returns, because the supplied evidence does not establish its underlying cause or repair.

12. What the service center may check

  • Confirm whether U2142:00 is stored before the sleep-mode step.
  • After the vehicle has entered sleep mode, check for DTCs using the applicable Mazda diagnostic procedure.
  • Further service checks are not yet established by verified evidence.

13. Possible repair or resolution

  • The supplied Mazda bulletin excerpts document a clearing step: power off, lock all doors, and wait at least 5 minutes for sleep mode.
  • A permanent repair or replacement procedure is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Mazda manufacturer communication 09-001-24g, filed by NHTSA as MC-11008568-0001, published September 25, 2024: states that stored U2142:00, “Communication error with microphone,” will be cleared after power-off, door locking, and at least 5 minutes of sleep mode. https://static.nhtsa.gov/odi/tsbs/2024/MC-11008568-0001.pdf
  • Earlier revisions 09-001-24a through 09-001-24e and 09-001-23a contain the same supplied U2142:00 clearing-step evidence.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: Mazda manufacturer communications filed with NHTSA. The verified records apply to US-market Mazda CX-70 (2022–2025), CX-90 (2022–2025), and MX-30 (2022–2025); overlapping entries in the supplied data list narrower year ranges for CX-90 and MX-30 as well. Applicability should be confirmed for the individual vehicle.

19. Frequently asked questions

What does Mazda code U2142:00 mean?

The supplied official Mazda/NHTSA evidence identifies it as “Communication error with microphone.”

Can U2142:00 clear after the vehicle sleeps?

Yes. The cited Mazda bulletin excerpts state that if U2142:00 is stored, it will be cleared after turning power off, locking all doors, and waiting 5 minutes or more for sleep mode.

Is it safe to drive or charge with U2142:00?

Not yet established by verified evidence.

What causes U2142:00?

Not yet established by verified evidence.

20. Sources & verification

Verified
Mazda U2142: 00 (Communication error with microphone) will be cleared… | EV Diagnostics