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P1128 – Toyota DTC

Toyota DTC P1128 – Throttle Control Motor Lock

DTC P1128 meaning on Toyota

DTC P1128 on Toyota refers to the Throttle Control Motor Lock malfunction. This diagnostic trouble code indicates an issue with the throttle control motor locking mechanism.

Toyota DTC P1128 symptoms

  • Check Engine Light (CEL) illuminated on the dashboard
  • Reduced engine power or acceleration
  • Difficulty maintaining a steady idle

Toyota DTC P1128 causes

  • Throttle control motor failure
  • Wiring or connector issues in the throttle control circuit
  • Electronic control module (ECM) malfunction

Toyota DTC P1128 seriousness

The DTC P1128 code should be addressed promptly as it can lead to drivability issues and potential safety concerns. Ignoring this code may result in further damage to engine components.

How to diagnose DTC P1128 on Toyota

  1. Use a diagnostic scanner to retrieve the trouble codes stored in the vehicle’s ECM
  2. Inspect the throttle control motor and its wiring for any visible damage or loose connections
  3. Perform a thorough inspection of the throttle control system for any signs of wear or malfunction

How to fix DTC P1128 on Toyota

  1. Replace the throttle control motor if it is found to be faulty
  2. Repair any damaged wiring or connectors in the throttle control circuit
  3. If the ECM is determined to be the issue, it may need to be reprogrammed or replaced

How to erase DTC P1128 on Toyota

  1. After addressing the root cause of the issue, use a diagnostic scanner to clear the trouble codes from the ECM
  2. Ensure that the repairs have been completed successfully before clearing the codes

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← All Toyota Diagnostic Trouble Codes

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