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Home / DTC / C2227 — Rear Right(RR) Actuator - Electrical | Excessive Temperature Of Brake Disc

C2227 — Rear Right(RR) Actuator - Electrical | Excessive Temperature Of Brake Disc

Detailed page for trouble code C2227.

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Code

C2227

HYUNDAI C — Chassis

Rear Right(RR) Actuator - Electrical | Excessive Temperature Of Brake Disc

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

Causes

  • Stuck or seized rear-right caliper piston or slide pins causing dragging
  • Collapsed or internally restricted flexible brake hose (retains pressure)
  • Rear-right brake actuator (electrical) or ABS/ESC modulator valve fault
  • Short to power or short to ground in actuator wiring or connector corrosion
  • Faulty wheel speed sensor or related ABS module causing incorrect control
  • Parking brake partially engaged or binding mechanism

Symptoms

  • Burning brake smell from rear-right wheel area
  • Excessive wheel/disc heat on touch/with IR thermometer
  • Vehicle pulling to one side under braking or while driving
  • Reduced fuel economy or dragging sensation
  • Smoke from wheel in severe cases
  • ABS/ESC warning light or other brake system indicator illuminated

What to check

  • Read ABS/ESC and module freeze frame and full fault list with scan tool
  • Visually inspect RR brake assembly for stuck caliper, pad contact, leaks
  • Check RR wheel bearing and hub for excessive friction
  • Measure wheel temperature (IR thermometer) comparing all four corners after a short drive/stop test
  • Inspect RR actuator connector and wiring for corrosion, damage, or melted insulation
  • Measure actuator supply voltage and ground at connector with ignition on

Signal parameters

  • Actuator supply voltage: approx. vehicle battery voltage (~12 V) at connector with ignition on (verify against service manual)
  • Actuator control signal: PWM or module-controlled — verify presence/variation with scan tool or oscilloscope
  • Actuator coil/motor resistance: refer to service manual; significant deviation or open/short indicates fault
  • Actuator current draw: unusually high continuous current suggests stuck valve/motor or binding brake
  • Wheel temperature: compare RR to other corners; RR significantly higher (example: >30–50°C higher) indicates local overheating
  • Wheel speed sensor signals: consistent sine/pulse signals and comparable amplitude/period with other wheels

Diagnostic algorithm

  1. Retrieve and record all ABS/ESC and brake-related DTCs and freeze frame data. Note whether C2227 is present continuously or intermittently.
  2. Visually inspect RR brake components (caliper, pads, rotor), actuator, wiring harness and connector for damage, signs of overheating, corrosion or melted insulation.
  3. With vehicle safely lifted and supported, spin the RR wheel by hand to check for drag, roughness, or bearing noise. Compare free spin with other wheels.
  4. Perform a short drive, then carefully measure wheel/disc temperatures with an IR thermometer. If RR is much hotter, this confirms local overheating.
  5. Backprobe the RR actuator connector: verify proper supply voltage and ground with ignition on and with system enabled. Observe control signal while commanding ABS/ESC actuations with a scan tool.
  6. Check actuator resistance/current per service data. If actuator draws high current or shows short/open, replace or bench-test the actuator assembly.
  7. If mechanical drag suspected: remove caliper and check piston movement and slide pins. Inspect pads and rotor for uneven wear. Replace or rebuild caliper if seized.
  8. Inspect and, if needed, replace flexible hose if internally collapsed (compare pressure drop or inspect during bleeding).
  9. Clear codes, repair identified faults, then perform road test and recheck temperatures and scan tool live data to confirm issue is resolved.
  10. If intermittent electrical fault persists, trace wiring back to ABS module, repair damaged wiring, and re-test. Replace ABS/ESC module only after ruling out wiring and actuator faults.

Likely causes

  • Mechanical drag at RR caliper (pads contacting disc when released)
  • Electrical fault at RR actuator (stuck valve or motor drawing current)
  • Damaged wiring/connector to RR actuator (intermittent or constant power)
  • Collapsed brake hose preventing pressure release
  • Incorrect ABS modulator operation affecting that corner

Fault status

⚠️ Status
C2227 — Rear Right Actuator (electrical) / Excessive Brake Disc Temperature detected at rear right wheel.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0 - 3.0 hours

Similar codes

C2226 C2228 C1234 C0040 C1110
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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