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Home / DTC / C0080 — Rear-LH ABS Solenoid or Motor #1 Circuit Malfunction (Outlet Valve)

C0080 — Rear-LH ABS Solenoid or Motor #1 Circuit Malfunction (Outlet Valve)

Detailed page for trouble code C0080.

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Code

C0080

HYUNDAI C — Chassis

Rear-LH ABS Solenoid or Motor #1 Circuit Malfunction (Outlet Valve)

Brand: HYUNDAI
Type: C — Chassis
AI status
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Page language: EN

Causes

  • Open or short in the LH rear ABS solenoid wiring or connector
  • Corroded, bent or loose connector pins at wheel or ABS modulator
  • Failed LH rear outlet solenoid (internal coil or valve stuck)
  • Poor power supply or ground to ABS modulator
  • Blown fuse or faulty relay feeding ABS module
  • Internal fault in ABS control module (driver transistor or PCB)

Symptoms

  • ABS warning lamp illuminated (may also trigger ESC/Traction lamp)
  • ABS may be disabled — no ABS modulation during hard/braking on low traction
  • Longer stopping distance under ABS events or pulsing brake pedal behavior
  • Possible stored or intermittent fault that may reappear after clearing
  • No obvious brake fluid leak (electrical/hydraulic valve fault is internal)

What to check

  • Retrieve all ABS codes and freeze frame with a quality scan tool; note whether fault is active or historic
  • Visually inspect LH rear wheel wiring harness, connector, and ABS modulator connections for damage, corrosion, or water
  • Check ABS-related fuses and relays; verify proper power and ground at ABS module
  • Back-probe solenoid connector at the module and at the wheel while commanding ABS valves with a scan tool
  • Measure solenoid coil resistance (compare to vehicle service specification)
  • Perform continuity and short-to-ground/power tests on solenoid wiring to the module

Signal parameters

  • Solenoid coil resistance: typically low (single to tens of ohms). Check vehicle service manual for exact spec — excessive resistance or open = fault
  • Activation signal: ABS module typically applies pulsed 0–12 V (or switched ground depending on design) to valve driver when actively modulating
  • Idle (not commanded): near 0 V (or battery voltage depending on driver type) — verify expected resting voltage with service data
  • Current draw during activation: usually under 1–2 A for each valve (varies by design); excessive current indicates short or mechanical seizure
  • CAN bus/ABS module communications should be present and error-free when module powered

Diagnostic algorithm

  1. Read and record ABS/ESC codes and freeze-frame data; clear codes and attempt to re-create the fault with a road test or ABS activation routine.
  2. Perform visual inspection of LH-rear wheel harness, connector, and ABS modulator harness for damage, corrosion, pin displacement or water entry.
  3. Verify ABS module power and ground fuses/relays. Measure battery voltage at the ABS module power pin and check main ground continuity to chassis.
  4. With ignition on, back-probe the LH rear solenoid connector at the ABS module. Command the outlet valve ON/OFF using a scan tool and observe voltage/pulse and module response.
  5. Measure solenoid coil resistance at the wheel connector (with harness disconnected). Compare to service spec. Open or very high = faulty coil/wiring. Very low = shorted coil.
  6. Perform continuity test from the solenoid connector to the ABS module connector; check for short to ground or battery on signal wires.
  7. If wiring and connectors pass, bench-test or replace the solenoid valve (or ABS modulator valve assembly) and retest. If bench replacement not possible, substitute known-good valve/module where practical.
  8. If module does not command the valve but wiring and solenoid are OK, investigate ABS module internal driver, module power/ground, and CAN communications. Consider module repair or replacement per service manual.
  9. After repair, clear codes, perform ABS activation/self-test via scan tool, and road test to confirm fault no longer sets.

Likely causes

  • High resistance or open circuit in solenoid coil (broken wire, damaged pin)
  • Short to ground or short to battery in solenoid feed/signal wire
  • Corrosion or water intrusion at the wheel harness connector
  • Failed solenoid valve (coil open or shorted) or mechanically seized valve
  • ABS module power/ground fault or internal driver failure
  • Blown ABS fuse or defective relay causing intermittent supply

Fault status

⚠️ Status
C0080 — Rear Left (LH) ABS solenoid/motor #1 outlet valve circuit malfunction. The ABS control module detected an electrical/hydraulic fault affecting the LH rear outlet valve; ABS functionality may be limited.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

C0078 C0079 C0081 C0100 C0265
371

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