Acura P1078: Intake Manifold Tuning (IMT) Valve Stuck in Low RPM Position

What Does The Acura P1078 Code Mean?

When the PCM sends an open (short runner) command, no short runner return signal is received for at least 3 seconds. Intake air temperature 5 ºF (-15 ºC), engine speed is 3,800 rpm and battery voltage minimum of 10.5v.

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.

What Are The Potential Causes Of The Acura P1078 Code?

• Poor connections or loose terminals at the IMT actuator and the PCM
• “Open” or “Short” circuit between the PCM and the IMT actuator
• Faulty IMT actuator
• PCM needs to be updated with the latest software
• Faulty PCM

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> Autobahn88 Silicone Vacuum Hose Dress Up DIY Kit
>>> Acura Engine Control Module

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

Acura P1078, DTCDECODE.