What does code P1178 mean on Hyundai vehicles?
The ECU detects a malfunction of the electronic throttle system relay.
OBD-II Code Hyundai
P1178 — Hyundai — Electronic Throttle System (ETS) Relay Malfunction
The ECU detects a malfunction of the electronic throttle system relay.
Common symptoms
- Complete loss of throttle control
Possible causes
- Faulty ETS relay
- power supply issue
Initial recommendation
Test and replace ETS relay, verify power and ground circuits.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
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