P0661

Code

LAND ROVER P — Powertrain

Intake manifold tuning valve control - low circuit - bank 1

Brand: LAND ROVER

Type: P — Powertrain

Views: UK: 9 EN: 20 RU: 21

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Page language: EN

Damaged or corroded connector at the intake manifold tuning valve
Broken wire, chafing or short to ground in the harness to the IMTV actuator
Faulty intake manifold tuning valve (stuck, internally shorted coil or bad vacuum solenoid)
Blown fuse or loss of supply voltage to the actuator circuit
Poor ground connection or chassis ground problem
Faulty ECM/PCM driver (less common)

Read and record freeze-frame and live data; note other related codes (vacuum, runner position sensors)
Visually inspect IMTV connector and harness for damage, corrosion, pin push-out or water ingress
Check fuses and power supply to the IMTV circuit
Back-probe the connector while commanding the valve on/off to observe voltages
Measure coil resistance of the IMTV actuator and compare to manufacturer spec
Perform a wiggle test on wiring while monitoring signal to reproduce fault

Supply voltage to actuator: approx. battery voltage (~12 V) present at supply pin with ignition ON (verify against factory spec)
Control signal: often switched to ground by ECM or pulsed; voltage may toggle between near 0 V (grounded) and supply voltage when commanded
Coil/solenoid resistance: typically a low-ohm value (example range 10–60 ohms depending on design) — use factory spec for exact value
When commanded ON, expected measurable change (voltage or position) at the actuator; when OFF, circuit should show open/not-driven condition

Retrieve freeze-frame, freeze data and all stored codes. Note if code is historic or current.
Visually inspect wiring and connector for the bank 1 IMTV: look for corrosion, melted insulation, pin damage, or routing that could rub on engine components.
Verify battery voltage at the IMTV supply pin with ignition ON. Check related fuses/relay. Repair any supply faults.
Back-probe the control pin while commanding the IMTV ON/OFF using a scan tool. Observe whether the ECM attempts to change the signal and what voltages appear.
With power removed, measure resistance of the IMTV actuator coil. Compare to manufacturer specification. Replace actuator if coil is open or shorted.
Check for continuity between the IMTV control wire and the ECM pin; check for short to ground using an ohmmeter. Repair any wiring faults.
If wiring and actuator test good, check engine/chassis grounds near the manifold and repair as needed.
If wiring, supply and actuator are confirmed good and fault persists, consider ECM driver fault. Before ECM replacement, verify with scope and consult manufacturer procedures.
After repairs, clear codes and perform a test drive/retest to confirm the fault does not return.

⚠️ Status

Intake manifold tuning valve control - low circuit - bank 1 detected (low voltage/short to ground on IMTV control circuit).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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P0661 — Intake manifold tuning valve control - low circuit - bank 1