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Kia C166A87

2021 Soul (SK3) vehicles. After replacement, the BCW (BSD) variant coding needs to be performed using the KDS under S/W Management for the options equipped for that vehicle. Note:

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact a Kia dealer or qualified service provider if C166A87 is present following BCW module replacement, as the documented resolution requires KDS variant coding.
Confidence95%

Quick answer

For applicable 2020–2021 Kia Soul (SK3) vehicles, DTC C166A87 is documented after BCW module replacement when BCW (BSD) variant coding has not been performed with Kia KDS under S/W Management for the vehicle’s installed options.

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 C166A87 mean?

For applicable 2020–2021 Kia Soul (SK3) vehicles, DTC C166A87 is documented after BCW module replacement when BCW (BSD) variant coding has not been performed with Kia KDS under S/W Management for the vehicle’s installed options.

2. Technical explanation

The verified Kia/NHTSA communication identifies C166A87 as “CAN Time-Out LDWS/LKAS/MFC/LDW/LKA.” It states that, after replacing a Blind-Spot Collision Warning (BCW) module, BCW (BSD) variant coding must be performed using KDS under S/W Management for the options equipped on that vehicle. The communication also states that BCW and Rear Cross-Traffic Collision Warning (RCCW) are linked; one cannot be disabled without the other.

3. What system is affected?

Blind-Spot Collision Warning (BCW/BSD) configuration and its communication relationship with LDWS/LKAS/MFC/LDW/LKA systems. RCCW is also identified as linked to BCW.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • DTC C166A87 may be stored after replacement of a BCW module.

6. Possible causes

  • After BCW module replacement, required BCW (BSD) variant coding has not been performed using KDS under S/W Management for the vehicle’s equipped options.

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

  • Have a qualified Kia service provider verify BCW (BSD) variant coding with KDS under S/W Management after BCW module replacement.
  • Do not assume BCW can be disabled independently of RCCW; the verified communication states these functions are linked.

10. Step-by-step troubleshooting

  1. Confirm whether the BCW module was replaced.
  2. Using Kia KDS under S/W Management, perform or verify BCW (BSD) variant coding for the options installed on the vehicle.
  3. Recheck for DTC C166A87 after the required coding procedure.

11. When to contact service

Contact a Kia dealer or qualified service provider if C166A87 is present following BCW module replacement, as the documented resolution requires KDS variant coding.

12. What the service center may check

  • Verify the vehicle is an applicable Kia Soul (SK3).
  • Verify BCW module replacement history.
  • Verify BCW (BSD) variant coding under KDS S/W Management matches the vehicle’s equipped options.
  • Recognize that BCW and RCCW are linked and cannot be independently disabled, according to the verified communication.

13. Possible repair or resolution

  • Perform BCW (BSD) variant coding with Kia KDS under S/W Management for the options equipped on the vehicle after BCW module replacement.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Kia/NHTSA manufacturer communication PS661, NHTSA document MC-10176070-0001, published May 8, 2020. It documents C166A87 after BCW module replacement on 2020–2021 Soul (SK3) vehicles and specifies KDS variant coding.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication PDF 10176070 (PS661): https://static.nhtsa.gov/odi/tsbs/2020/MC-10176070-0001.pdf

19. Frequently asked questions

What does C166A87 mean?

The verified communication labels it “CAN Time-Out LDWS/LKAS/MFC/LDW/LKA” and documents it in connection with BCW module replacement and missing or incomplete BCW (BSD) variant coding.

What vehicle is supported by the supplied applicability evidence?

The supplied applicability record supports the 2020 Kia Soul in the US. The official communication references 2020–2021 Soul (SK3) vehicles.

What is the documented fix after BCW module replacement?

Perform BCW (BSD) variant coding with Kia KDS under S/W Management for the options equipped on the vehicle.

Can BCW be disabled without RCCW?

No. The verified communication states that BCW and RCCW are linked, so one cannot be disabled without the other.

20. Sources & verification

Verified
Kia C166A87: 2021 Soul (SK3) vehicles. After replacement, the BCW… | EV Diagnostics