P2077 code meaning
Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Low (Bank 1)
Powertrain system Generic code P20xx codes Check engine light
What P2077 means
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.
P2077 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P2077
- Check engine light (GM Type B; Ford without MIL)
- Stuck-valve tests P2070/P2071 disabled
- Driving often unchanged
Common causes of P2077
- Most 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)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Imt position sensor
What each part of P2077 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 77 | The exact fault in that area. |
What to do next
- Note P2077 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2077
What does P2077 mean?
P2077 means "Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Low (Bank 1)". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2077?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2077 fail an emissions test?
Yes, it can. P2077 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2077 to fix?
Difficulty: easy. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2077 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.