P2077Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Low (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
- The feedback signal of the bank 1 tuning valve has dropped below its plausible lower edge, typically because the signal is shorted to ground or the line is open with a pull-down. GM states it in percent of the sensor range: in 2006/2007 and again in the 2015/2018 tables a reading of 95 % or more counts as low, so GM's scaling is inverted; once 320 of every 400 checks (one each 12.5 ms) fail, it is stored as Type B. The Bosch-style logic in GM's 2023/2024 tables uses a raw voltage under about 0.7 V. FCA names P2077 for the manifold tuning valve of the 2007-2010 3.5L V6 (Sebring, Avenger, Journey, Pacifica) and advises checking the actuator duty cycle before replacing the manifold. Ford lists P2077 without MIL. P2078 is the high side.
- What you may notice
- Check engine light (GM Type B; Ford without MIL)
- Stuck-valve tests P2070/P2071 disabled
- Driving often unchanged
- Likely causes
- LikelySignal wire shorted to ground or chafed against the engine
- Possible5 V reference to the sensor interrupted
- PossibleActuator with integrated sensor defective (FCA 3.5L, check duty cycle first)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.