Powertrain, generic (extended)

P2076 Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Range/Performance (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

The sensor signal is electrically within its limits, but it does not behave plausibly. GM defines this through the learn routine of the actuator in the 2015 and 2018 tables: if the reported position stays between 5 % and 35 % for 5 s or more while learning, or the learn routine starts ten or more times within a single key cycle, P2076 is stored as Type B after supply voltage of at least 11 V and one second of running. In GM's 2023 and 2024 tables the valve reports its position digitally over SENT, and P2076 flags a faulty or invalid data value from that interface. Hard-to-move flaps, a worn sensor track or a wrong actuator can cause it. It is less specific than P2077/P2078, which detect plain shorts and opens.

Likely causes

Flap binding so that the actuator cannot complete its learn sweep
Worn potentiometer track giving jumpy readings
Digital (SENT) position message corrupted by wiring or actuator electronics
Incorrect or non-matching replacement actuator

Symptoms

  • Check engine light after two trips (GM Type B)
  • Actuator audibly cycling at key-on
  • Slight power loss in parts of the rev range

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–400
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

imt position sensor

Related codes

P2075P2077P2078P2070P207B

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.