P3481

Code

Generic P — Powertrain

Cylinder 11 Deactivation/Intake Valve Control Circuit/Open

Brand: Generic

Type: P — Powertrain

Views: UK: 25 EN: 32 RU: 21

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Page language: EN

Causes

Open or broken wiring in the cylinder 11 actuator/solenoid circuit
Corroded, loose or disconnected connector at the solenoid or ECM
Failed intake valve deactivation / solenoid actuator (open coil)
Blown fuse or loss of power feed or control ground to the circuit
Poor or intermittent connector pin contact (corrosion, bent pin)
Incorrect previous repair or damaged harness (chafing, rodent)

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Possible rough idle or misfire if cylinder deactivation is affected
Reduced engine performance or drivability complaints
Increased fuel consumption if cylinder control is disabled
Cylinder-specific noise or uneven operation under some loads

What to check

Read and record freeze frame and live data with a scan tool; verify DTC is active or historic
Visually inspect wiring and connector for cylinder 11 solenoid for damage, corrosion, or disconnection
Backprobe connector with key ON (engine OFF) and measure supply voltage and control signal
Measure coil resistance of the solenoid (disconnect connector first) and compare to specification/range
Perform continuity check from solenoid pin to PCM pin to detect open circuits
Wiggle wiring harness while monitoring live data or resistance to find intermittent opens

Signal parameters

Key ON, engine OFF: power feed/main supply to solenoid typically ~12 V (battery voltage) on the supply pin
Control side: ECM usually switches the solenoid to ground or provides a duty-cycle signal when active (voltage near 0 V when commanded to ground; pulses when using PWM)
Typical solenoid coil resistance (varies by engine) commonly in the range 2–30 ohms; open/infinite = fault
Expected current when actuated typically 0.1–2 A depending on design
If circuit open: infinite (OL) resistance between solenoid pins or no continuity to ECM connector pin

Diagnostic algorithm

Verify the DTC with a scan tool. Note freeze frame and any related cylinder deactivation or misfire codes.
Perform a visual inspection of the solenoid connector and wiring for physical damage, corrosion, or connector disengagement at cylinder 11 and along the harness to the engine control module.
With key ON (engine OFF) backprobe the connector: confirm battery supply voltage on the feed pin and check the control pin for proper resting voltage. If supply is missing, trace back to fuse/relay/power distribution.
Disconnect the solenoid connector and measure solenoid coil resistance with an ohmmeter. If resistance is open (OL) or out of expected range, replace the solenoid.
Check continuity between the solenoid control pin and the ECM pin. If open, repair or replace the damaged wiring/harness. If shorted to battery or ground, locate and repair the short.
If wiring and solenoid check good, command the solenoid with a scan tool while monitoring voltage/current. If ECM does not switch or provides incorrect signal, consider ECM driver fault.
If necessary, swap with a known-good identical solenoid (if accessible) to confirm diagnosis. After repairs, erase codes and perform a functional test and road test to confirm the fault does not return.
Follow manufacturer procedures and safety precautions; disconnect battery before performing wiring repairs. Re-check for related DTCs after repair.

Likely causes

Wiring harness damage between cylinder 11 solenoid and ECM (open)
Connector at the solenoid pushed out, corroded or pin backed out
Solenoid coil open (increased or infinite resistance)
Faulty ECM driver (less common)

Fault status

⚠️ Status

P3481 set when the PCM detects an open circuit in the Cylinder 11 Deactivation / Intake Valve Control circuit (no continuity or excessively high resistance in the actuator/solenoid circuit). MIL on; freeze frame data stored when fault occurred.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours