Powertrain, generic (extended)

P2071 Intake Manifold Tuning (IMT) Valve Stuck Closed (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

Counterpart to P2070: the bank 1 tuning valve receives an open command, but the position feedback keeps showing it shut. In GM's 2006 and 2007 tables the check simply compares commanded and actual flap position under load between 1000 and 3600 rpm, Type B. From 2015 on (also engine LWE in 18OBDG03A) GM requires that the open stop is reached within 5 s; 320 failed out of 400 samples set the code, and it stays blocked while P0660 to P0662 or the sensor codes P2077/P2078 are active. GM's 2023/2024 tables describe P2071 as stuck open, so on those vehicles the meaning of P2070/P2071 should be checked against the service data. Ford lists the code without MIL. Expect lost power at high rpm; bank 2 uses P206F.

Likely causes

Flap seized shut by deposits or corroded shaft bushings
Actuator defective, no longer turns the flap against its return spring
Weak supply to the actuator from a corroded connector or relay contact

Symptoms

  • Lack of power at high engine speed
  • Check engine light (GM Type B, Ford without MIL)
  • Engine otherwise runs normally

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–450
Time0.5–2.5 h

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

Parts involved

imt valveimt actuator

Related codes

P2070P206FP2076P2077P0661

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