Possible causes

– Faulty Intake Manifold Tuning Valve (IMTV)
– Intake Manifold Tuning Valve harness is open or shorted
– Intake Manifold Tuning Valve circuit poor electrical connection

When is the code detected?

The Engine Control Module (ECM) has detected a low signal from the Intake Manifold Tuning Valve (IMTV)

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0661 Description

The Intake Manifold Tuning Valve (IMTV) system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is more or less than an the expected calibrated range

P0661 Information for specific makes

P0661 ACURA
P0661 HONDA
P0661 HYUNDAI
P0661 KIA
P0661 LEXUS
P0661 MAZDA
P0661 SUBARU
P0661 SUZUKI
P0661 TOYOTA