Powertrain
generic / SAE
P2078
Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit High (Bank 1)
IMT position sensor at bank 1 reads above upper plausibility — open signal or short to B+. The intake manifold runner control (IMRC) flaps tune intake geometry for filling efficiency across the rpm range; stuck flaps cost part-load torque and can set lean codes.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number– / 78
Possible causes
- Open signal line high
- Connector pins corroded - high contact resistance low
- Supply wire pinched against B+ source low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 50–400 €
- Estimated time: 0.5–2 h
- Component: imt position sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012