P0028

Code

LAND ROVER P — Powertrain

Intake Valve Control Solenoid - Circuit Range performance (bank 2)

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 15 EN: 25 RU: 21

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Faulty intake oil control valve (VVT solenoid) on bank 2
Wiring: open, short to ground, short to battery, high resistance, or damaged connector
Poor electrical connection or corrosion at connector/terminal
Contaminated or low engine oil (degraded oil, sludge) restricting valve movement
Faulty cam phaser or mechanical binding in timing system
Stretched/failed timing chain or related timing components

Read stored and pending DTCs and freeze-frame/ignition data with a scan tool
Check live data: commanded vs actual camshaft position (if available) and VVT status
Verify engine oil level, condition, and service history
Visually inspect solenoid connector and wiring for damage, corrosion, or disconnection
Measure supply voltage at the solenoid connector with ignition ON (battery voltage expected)
Measure solenoid coil resistance with connector disconnected (see signal_params)

Coil resistance (typical): approximately 6–20 ohms (manufacturer-specific — consult service data)
Supply voltage: ~11–14 V with ignition ON
Ground: stable low resistance to chassis ground
Control signal: PWM from ECM; frequency commonly 80–300 Hz (vehicle-specific)
Duty cycle: 0–100% depending on commanded cam angle
Expected cam position change: varies by engine; actual vs commanded camshaft angle should track within manufacturer tolerance (degrees)

Retrieve full DTC list and freeze-frame data. Note conditions when code set (temp, rpm, oil temp).
Clear codes and take a short test drive to see if P0028 returns; monitor live camshaft data and solenoid commanded duty.
Check engine oil level and condition; if low or dirty, correct oil level and change oil/filter before further tests.
Visually inspect the intake VVT solenoid (bank 2) connector and wiring harness for damage, pin corrosion, or water ingress. Repair as needed.
With ignition OFF, disconnect solenoid and measure coil resistance; compare to spec. Replace solenoid if open/short or out of range.
With ignition ON, verify battery voltage at the solenoid power terminal. Check ground continuity from solenoid ground to chassis.
Back-probe the control circuit and check for proper PWM (frequency and duty change) when the ECM commands VVT. Use an oscilloscope if available.
Perform a wiggle test on the harness while monitoring live data for intermittent faults.
Swap the bank 2 intake solenoid with bank 1 (if identical) to determine if the fault follows the solenoid or stays with the bank.
If solenoid and wiring check OK but cam angle does not respond, inspect cam phaser and timing components for mechanical binding or chain stretch. Perform timing inspection per service manual.
If all components, wiring and mechanical systems are good and code persists, consider ECM driver fault and follow manufacturer procedures for ECM tests or replacement.

Failed or clogged intake VVT solenoid on bank 2
Open/short or high resistance in the harness between the ECM and the solenoid
Low oil pressure or dirty oil preventing solenoid/actuator movement
Cam phaser stuck or mechanical timing issue preventing expected cam advance/retard
Intermittent connector contact or water/corrosion in connector

⚠️ Status

P0028 - Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5-3.0 hours

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P0028 — Intake Valve Control Solenoid - Circuit Range performance (bank 2)