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Home / DTC / C2352 — Front Supply/Exhaust Valve

C2352 — Front Supply/Exhaust Valve

Detailed page for trouble code C2352.

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Code

C2352

HYUNDAI C — Chassis

Front Supply/Exhaust Valve

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

Causes

  • Open or short in valve control wiring
  • Corroded or loose connector at the valve
  • Failed or internally stuck valve/solenoid
  • Blown fuse or faulty relay supplying the valve
  • Insufficient battery or supply voltage
  • Contamination or clogging in hydraulic/pneumatic lines or valve body

Symptoms

  • Warning lamp(s) or message related to braking/traction/vehicle stability (or system specific to the valve)
  • Reduced or altered system performance (e.g., ABS/traction/ride control behavior depending on system)
  • Unusual noise from valve area (clicking, buzzing, or no expected actuation sound)
  • Intermittent fault occurrence or permanent fault depending on condition
  • Possible loss of automatic function controlled by the valve

What to check

  • Read DTCs and freeze frame/related codes with a capable scan tool; record data
  • Inspect valve connector for corrosion, bent pins, water ingress, or damage
  • Check relevant fuses and relays for continuity and proper operation
  • Back-probe connector while commanding valve to observe supply voltage and ground
  • Measure coil resistance at the valve per service manual
  • Perform an actuator/bi-directional test with scan tool (if available)

Signal parameters

  • Supply voltage: ~12 V nominal at rest; present at connector battery side (measure with key on/engine running depending on system)
  • Control signal: typically switched ground or PWM from control module — duty cycle varies with commanded position
  • Coil resistance: varies by valve design — consult service manual; typically low ohms to a few dozen ohms
  • Activation response: audible clicks or change in system pressure when commanded by scan tool
  • No voltage or open circuit indicates wiring/fuse issue; short to ground/low resistance indicates possible shorted coil or wiring

Diagnostic algorithm

  1. Retrieve C2352 and any other related codes; note freeze-frame and ignition state.
  2. Visually inspect valve connector and wiring for obvious damage, corrosion, or loose terminals.
  3. Verify fuses and relays for the valve circuit and replace if faulty.
  4. With connector disconnected, measure coil resistance across the valve terminals and compare to service specification.
  5. Back-probe the valve connector while commanding the valve with a scan tool: verify supply voltage, control signal (PWM/duty), and good ground.
  6. If electrical signals are correct but the valve does not operate, inspect the valve mechanically and consider bench-testing or replacing the valve.
  7. If no control voltage is present, trace wiring to the fuse/relay and control module; check for continuity, shorts to ground or power, and repair as needed.
  8. Check hydraulic/pneumatic lines and valve body for contamination or blockage that may prevent proper operation and clean/replace components as required.
  9. After repair, clear codes, perform actuator tests, and road-test to verify proper function and that the code does not return.
  10. If fault persists after valve and wiring verified, consider module diagnostics or software updates per dealer procedures.

Likely causes

  • Damaged wiring harness to the valve (chafing, rodent damage)
  • Connector pins corroded or pushed out
  • Valve solenoid coil open or shorted
  • Fuse or relay for the valve circuit blown or intermittent
  • Valve mechanically seized due to debris or corrosion

Fault status

⚠️ Status
Front supply/exhaust valve — electrical/functional fault detected. Check valve, wiring, connectors, fuses/relays and control signals.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 60-120 minutes

Similar codes

C2350 C2351 C2353 C2340 C1201
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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