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Audi B145504

Temperature sensor of steering wheel heating defective

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an Audi service provider for diagnosis if B145504 persists, the heated steering wheel remains inoperative, or a steering-wheel malfunction warning is displayed.
Confidence95%

Quick answer

Audi DTC B145504 means “Temperature sensor of steering wheel heating defective.” Audi technical communications document that the heated steering wheel may stop working and a steering-wheel malfunction warning may appear. Under certain conditions, the heating may switch off after about five minutes; pressing the steering-wheel-heater button or cycling the ignition can switch it on again.

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 B145504 mean?

Audi DTC B145504 means “Temperature sensor of steering wheel heating defective.” Audi technical communications document that the heated steering wheel may stop working and a steering-wheel malfunction warning may appear. Under certain conditions, the heating may switch off after about five minutes; pressing the steering-wheel-heater button or cycling the ignition can switch it on again.

2. Technical explanation

The documented DTC is stored in the steering column electronics control module J527 (address word 0016), with symptom code 7340800. It may be active/static or passive/sporadic. Audi’s published technical background states that the steering-wheel heating can switch itself off after five minutes under certain conditions. The supplied evidence does not establish a component-level failure cause beyond the DTC description.

3. What system is affected?

Steering-wheel heating temperature-sensor function and steering column electronics control module J527 (address word 0016).

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Heated steering wheel is not working.
  • Steering-wheel warning malfunction displayed in the instrument cluster.
  • Steering-wheel heating may switch itself off after approximately five minutes under certain conditions.

6. Possible causes

  • The stored DTC identifies a defective steering-wheel-heating temperature sensor.
  • Audi states that the heating can switch itself off after five minutes under certain conditions. 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

  • If the heating switches off, press the steering-wheel-heater button to switch it on again.
  • An ignition cycle may allow the steering-wheel heating to switch on again.
  • Arrange diagnosis using Audi service information if the concern persists or a steering-wheel malfunction warning is displayed.

10. Step-by-step troubleshooting

  1. Check whether B145504 is stored in steering column electronics control module J527, address word 0016.
  2. Record whether the DTC is active/static or passive/sporadic and whether symptom code 7340800 is present.
  3. Confirm the reported behavior: inoperative steering-wheel heat, cluster warning, or heating that switches off after about five minutes.
  4. Further diagnostic steps are not yet established by verified evidence.

11. When to contact service

Contact an Audi service provider for diagnosis if B145504 persists, the heated steering wheel remains inoperative, or a steering-wheel malfunction warning is displayed.

12. What the service center may check

  • Scan steering column electronics control module J527 (address word 0016) for B145504.
  • Check the DTC status and symptom code 7340800.
  • Use the applicable Audi manufacturer communication for the vehicle's model year and configuration.

13. Possible repair or resolution

  • Audi documents that pressing the steering-wheel-heater button or cycling the ignition can switch the heating back on after an automatic switch-off event.
  • A permanent repair procedure is not yet established by the supplied verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Audi manufacturer communication A4822232053869_5, published March 9, 2022; NHTSA document MC-10209107-0001.
  • Audi manufacturer communication A4820912053869_4, published October 27, 2020; NHTSA document MC-10181981-0001.
  • Audi manufacturer communication A4820852053869_3, published March 11, 2020; NHTSA document MC-10172605-0001.
  • Audi manufacturer communication A4819782053869_2, published May 9, 2019; NHTSA document MC-10160373-0001.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official manufacturer communications are published through NHTSA and describe B145504 in steering column electronics control module J527. Verified US applicability data includes Audi A3 (2016–2023), A7 (2016–2023), A8 (2016–2023), Q5 (2016–2023), e-tron (2016–2023), e-tron GT (2016–2023), and RS e-tron GT (2016–2023). Overlapping year ranges appear in the supplied applicability records; exact vehicle applicability should be confirmed by VIN and Audi service information.

19. Frequently asked questions

What does Audi code B145504 mean?

It means “Temperature sensor of steering wheel heating defective.”

What symptoms are documented for B145504?

Audi documents an inoperative heated steering wheel and a steering-wheel malfunction warning in the instrument cluster.

Where is this code stored?

Audi documents B145504 in the steering column electronics control module J527, address word 0016.

Can the steering-wheel heater begin working again after it shuts off?

Audi states that under certain conditions it can switch off after five minutes. Pressing the heater button or cycling the ignition can switch it on again.

Is there a verified recall for B145504?

Not yet established by verified evidence.

20. Sources & verification

Verified
Audi B145504: Temperature sensor of steering wheel heating defective | EV Diagnostics