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Home / DTC / P0081 — Intake Valve Control Circuit (Bank 2)

P0081 — Intake Valve Control Circuit (Bank 2)

Detailed page for trouble code P0081.

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Code

P0081

LAND ROVER P — Powertrain

Intake Valve Control Circuit (Bank 2)

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 2 EN: 4 RU: 0
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Page language: EN

Causes

  • Open or short in the intake valve/runner solenoid wiring (Bank 2)
  • Poor connector connection or corroded terminal at the solenoid or ECM
  • Faulty intake valve/runner control solenoid or actuator (Bank 2)
  • Failed or intermittent ground or supply to the solenoid
  • Mechanically seized intake valve/runner actuator or stuck runner
  • ECM internal fault or software anomaly

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
  • Reduced engine power, poor throttle response or limp-home mode
  • Rough idle, hesitation or surging under load
  • Reduced fuel economy
  • Possible accompanying misfire codes or other VVT/intake-related DTCs
  • Noise from intake manifold area or abnormal intake runner position behavior

What to check

  • Read and record freeze frame and all stored/pending codes; note related cam or fuel codes
  • Inspect intake runner/valve solenoid and actuator connectors for corrosion, damage, water intrusion and secure fit
  • Visually inspect wiring harness along its full route for chafing, pinches, burns, or repairs (focus on Bank 2 side)
  • With key on (engine off) check for proper reference voltage/power at solenoid connector and a good ground
  • Use a scan tool to command the intake valve/runner solenoid and observe live data: commanded vs actual position/status
  • Measure solenoid coil resistance at the connector (with harness disconnected) and compare to manufacturer spec

Signal parameters

  • Supply/reference voltage at connector: typically battery voltage (~11–14.5 V) with key ON (verify vehicle spec)
  • Control method: ECM usually switches ground or provides PWM control; duty cycle varies with commanded position
  • Solenoid coil resistance: typically low (single to low tens of ohms) — manufacturer specification required (measure with cold component)
  • Expected response in scan tool: commanded position vs feedback/state should change promptly when commanded; no response indicates circuit or actuator fault
  • PWM frequency: often tens to a few hundred Hz if PWM controlled — check manufacturer documentation

Diagnostic algorithm

  1. Retrieve and record DTCs and freeze frame data. Note whether code is pending or confirmed and any related codes (camshaft, actuator, power).
  2. Visually inspect the Bank 2 intake solenoid/actuator connector and wiring for obvious damage, corrosion, or water ingress. Repair as required.
  3. Verify battery voltage and charging system are in normal range; recharge/replace battery if low before testing.
  4. With harness connected, back-probe the solenoid connector: verify reference supply voltage present with key ON and check ground (or switched ground) signal while using a scan tool to command the device. Observe response.
  5. If no supply or ground, trace and repair wiring to fuse/relay/ECM; check connector pins and continuity to ECM. Repair shorts/opens and re-test.
  6. Disconnect harness and measure solenoid coil resistance and insulation (ohms). Compare to spec. If coil open or shorted to ground/chassis, replace solenoid.
  7. If coil resistance is OK but solenoid does not operate when bench-tested with correct supply and switching, replace the actuator/solenoid.
  8. If wiring and solenoid test good, check continuity and integrity of the ECM output for Bank 2. Swap with known-good identical channel (if service manual allows) or perform oscilloscope check of ECM driver. If ECM output is faulty, update software or replace ECM per manufacturer procedures.
  9. After repairs, clear codes, perform functional test with scan tool commanding intake valve/runner operation, and re-check for return of code while road-testing under varied load.
  10. Document repair and recommend intake cleaning/service if mechanical sticking was found to prevent recurrence.

Likely causes

  • Damaged wiring harness rubbing/chafed near engine or firewall on Bank 2 circuit
  • Corroded or bent pins at solenoid connector allowing intermittent contact
  • Solenoid coil open or shorted to ground/12V
  • Intake runner actuator mechanically seized from carbon build-up or broken linkage
  • Fault in ECM output driver for Bank 2

Fault status

⚠️ Status
Stored/active fault: Intake valve/runner control circuit malfunction detected on Bank 2. Possible wiring, connector, solenoid/actuator, or ECM driver issue; may impair engine performance.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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