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2021 HYUNDAI TUCSON
2.5L I4•AWD•AUTOMATIC•gas
1 active safety recall on this vehicle — view recalls
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Repairs425Labor501Torque3434Fluid9DTC1092Battery1Maintenance0Recalls1
P1155high severityPowertrain

Electronic Throttle System Malfunction Secondary

on 2021 Hyundai Tucson 2.5L I4 · AWD

What this code means

The PCM has detected a secondary or redundant fault in the Electronic Throttle System. This indicates multiple ETC faults have been detected, causing the system to enter a more restrictive failsafe mode.

Symptoms

  • Check Engine Light
  • Severe power limitation
  • Engine may only idle
  • ETC warning light
  • No throttle response above idle

Common causes

  • Multiple ETC component failures
  • Throttle body and pedal sensor disagreement
  • Critical wiring damage in ETC circuit
  • PCM ETC control module failure
  • Water intrusion in ETC connectors

Diagnostic steps

  1. Check for all ETC-related codes and diagnose each
  2. Inspect all ETC wiring and connectors for damage or water intrusion
  3. Test throttle body and accelerator pedal sensors
  4. Verify PCM ETC outputs
  5. Clear codes and retest after repairs

Repair notes

Diagnose and repair all ETC faults; this code sets when the system detects multiple concurrent issues.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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