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Kia C1112

Safe Relay Fault First, erase DTC. Then check the wiring and connector at the ECU. C1705 ECU Hardware Error C1604 ECU Over/Discharge Error C2413 ECU Hardware Error C2400 Motor Sign

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact Kia service or a qualified repair facility for diagnosis of the MDPS torque-sensor circuit and ECU.
Confidence95%

Quick answer

For Kia C1112, the verified TSB identifies a Torque Sensor Voltage Error. It directs checking the wiring and connector condition between the torque sensor and ECU; if the DTC returns, replace the MDPS ECU.

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 C1112 mean?

For Kia C1112, the verified TSB identifies a Torque Sensor Voltage Error. It directs checking the wiring and connector condition between the torque sensor and ECU; if the DTC returns, replace the MDPS ECU.

2. Technical explanation

The supplied official Kia/NHTSA TSB evidence identifies C1112 as “Torque Sensor Voltage Error.” The documented diagnostic path is to check the wiring and connector condition between the torque sensor and the ECU. If C1112 returns after that check, the TSB directs replacement of the MDPS ECU. The supplied diagnostic record’s canonical title conflicts with the official TSB excerpt by describing a safe-relay fault; the official TSB evidence specifically associates C1112 with the torque sensor voltage error.

3. What system is affected?

MDPS ECU, torque sensor, and the wiring/connectors between them.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • Wiring or connector condition between the torque sensor and ECU, as identified by the official TSB diagnostic instruction.
  • MDPS ECU, if C1112 returns after the wiring and connector check.

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 the vehicle evaluated by a qualified Kia service facility or similarly qualified technician.
  • Do not perform high-voltage or electronic steering-system repairs yourself.

10. Step-by-step troubleshooting

  1. Check the wiring and connector condition between the torque sensor and ECU.
  2. If C1112 returns, replace the MDPS ECU, per the supplied official TSB evidence.

11. When to contact service

Contact Kia service or a qualified repair facility for diagnosis of the MDPS torque-sensor circuit and ECU.

12. What the service center may check

  • Confirm DTC C1112.
  • Inspect the wiring and connector condition between the torque sensor and ECU.
  • Determine whether C1112 returns after the wiring and connector check.

13. Possible repair or resolution

  • If C1112 returns after the wiring and connector check, replace the MDPS ECU, according to Kia TSB CHA084 revisions supplied through NHTSA.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Kia TSB CHA084 revisions R3 through R8 are supported by the supplied NHTSA manufacturer communications. They identify C1112 as Torque Sensor Voltage Error and provide the wiring/connector check and MDPS ECU replacement direction if the code returns.
  • NHTSA MC-10202226-0001 (published 2021-10-05): https://static.nhtsa.gov/odi/tsbs/2021/MC-10202226-0001.pdf
  • NHTSA MC-10189545-0001 (published 2021-03-25): https://static.nhtsa.gov/odi/tsbs/2021/MC-10189545-0001.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official evidence is from Kia manufacturer communications filed with NHTSA. The supplied applicability records cover U.S. Kia Niro (2015–2022), Optima (2015–2022), Sorento (2015–2022), and Soul (2015–2022), with overlapping year ranges in the source data. Exact applicability should be confirmed by VIN and the applicable TSB.

19. Frequently asked questions

What does Kia C1112 mean?

The supplied official TSB evidence identifies C1112 as a Torque Sensor Voltage Error.

What does the Kia TSB instruct for C1112?

Check the wiring and connector condition between the torque sensor and ECU. If the DTC returns, replace the MDPS ECU.

Is C1112 a charging or high-voltage battery code?

Not established by verified evidence. The supplied TSB evidence concerns the torque sensor, MDPS ECU, and associated wiring/connectors.

Can I drive with C1112?

Not yet established by verified evidence.

20. Sources & verification

Verified
Kia C1112: Safe Relay Fault First, erase DTC. Then check the wiring… | EV Diagnostics