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Home / DTC / P3474 — Cylinder 10 Deactivation/Intake Valve Control Circuit Performance

P3474 — Cylinder 10 Deactivation/Intake Valve Control Circuit Performance

Detailed page for trouble code P3474.

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Code

P3474

Generic P — Powertrain

Cylinder 10 Deactivation/Intake Valve Control Circuit Performance

Brand: Generic
Type: P — Powertrain
Views: UK: 13 EN: 23 RU: 21
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Page language: EN

Causes

  • Open or short in the cylinder 10 deactivation/valve control wiring
  • Corroded or loose connector at the solenoid or PCM
  • Failed intake valve deactivation solenoid / oil control valve
  • Restricted oil passage or low engine oil pressure
  • Stuck or mechanically failed lifter / actuator / rocker
  • Faulty PCM or driver circuit

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Possible rough idle, vibration or intermittent misfire under some conditions
  • Reduced fuel economy when cylinder deactivation is not working correctly
  • Engine noise (tapping) from the affected bank if lifter/actuator mechanically stuck
  • Degraded performance or limp-home mode in some vehicles

What to check

  • Read and record stored codes and freeze-frame data with a scan tool
  • Verify oil level, oil condition, and correct viscosity
  • Visually inspect wiring and connector for cylinder 10 solenoid for damage, corrosion, or loose pins
  • Backprobe the solenoid connector and observe voltage/ground while commanding activation with a scan tool
  • Measure solenoid coil resistance (while disconnected) and compare to specification
  • Check for continuity to PCM and for shorts to ground/battery in harness

Signal parameters

  • Control type: switched 12 V supply or switched ground driver depending on manufacturer; verify with wiring diagram
  • Expected coil resistance: typically low ohms (manufacturer-specific; commonly 2–30 ohms). Compare to spec.
  • Control signal: pulse width or duty-cycle varies with engine load/speed when commanded; frequency can range from a few Hz to tens of Hz depending on strategy
  • Standby voltage at solenoid connector: ~battery voltage when supply side is present
  • When commanded OFF: open or no ground/pulse; when commanded ON: ground or switched supply present (monitor while commanding on/off)

Diagnostic algorithm

  1. Connect a scan tool, read PIDs, DTCs, and freeze-frame. Note conditions when the code set (engine speed, temp, oil temp/pressure).
  2. Check engine oil level and condition. If oil is very low, dirty, or incorrect viscosity, correct level and retest after cleaning or oil service.
  3. Perform a visual inspection of the cylinder 10 solenoid/OCV connector and harness. Repair any damaged wiring or corrosion.
  4. With ignition OFF, disconnect the solenoid and measure coil resistance between the solenoid pins. Compare to OEM spec. Replace if out of range or open.
  5. With ignition ON (engine off) and using a backprobe, command the solenoid ON/OFF with the scan tool and observe voltage/ground at the connector. Verify driver changes state.
  6. Check for short to battery or short to ground between the solenoid feed/return and vehicle ground/battery using an ohmmeter or power probe.
  7. If electrical tests pass, swap the cylinder 10 solenoid with an identical known-good solenoid on another cylinder (if practical) to see if the fault follows the solenoid.
  8. If the fault does not follow the solenoid, inspect/trace wiring to the PCM and check PCM driver output. Repair harness damage or replace PCM only after ruling out all harness/actuator faults.
  9. If electrical system and solenoid are good but the code persists, inspect valve train: remove valve cover(s) as required to check for stuck/failed lifter, actuator, rocker arm or blocked oil passages. Clean or replace failed mechanical components.
  10. After repairs, clear codes and perform a road/drive cycle to confirm the fault does not return. Re-scan for pending codes and verify normal operation.

Likely causes

  • Faulty cylinder 10 oil control valve (stuck or electrically failed)
  • Wiring open, short to ground, or short to battery on the solenoid feed or return
  • Poor connector pin contact or corrosion at the solenoid connector
  • Restricted oil feed or blocked oil passage to the deactivation actuator
  • Collapsed or mechanically seized lifter/actuator preventing valve deactivation
  • PCM driver fault (less common)

Fault status

⚠️ Status
P3474 — Cylinder 10 Deactivation / Intake Valve Control Circuit Performance: ECM detected abnormal performance in the cylinder 10 valve deactivation control circuit. Check solenoid, wiring, oil supply and valve train.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P3470 P3471 P3472 P3473 P3475 P3476
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