P2079Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Intermittent (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Intended for brief dropouts or jumps in the bank 1 valve feedback that come and go rather than sticking at one limit. No manufacturer documents this meaning publicly. GM's tuning valve tables stop at P2076 to P2078, and Ford's 2014 code list even assigns P2079 to an intake air system leak, an older Ford-specific text that has nothing to do with the position sensor, so scan-tool texts on Ford vehicles can differ. Per CARB, intermittent faults of an input component are covered by the circuit and rationality checks. Loose crimp contacts, a cracked connector housing or a cable that moves with engine rock are the classic sources; wiggle testing while watching the live value is the most useful check.
- What you may notice
- Light comes and goes (manufacturer-dependent)
- Fault often not present during workshop test
- Likely causes
- LikelyLoose or fretted terminals in the sensor connector
- PossibleWire broken inside the insulation, contact lost with engine movement
- RareDead spot on the sensor track
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.