Powertrain, generic (extended)

P207D Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit High (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

The bank 2 valve position signal reads above the highest value the controller accepts. Electrically that points at a broken sensor ground or a short from the signal to a supply voltage. There is no published manufacturer use of P207D; it mirrors GM's bank 1 code P2078, where 5 % or less counts as high due to the reversed scale, while GM's 2023/2024 logic compares the raw voltage with about 4.8 V. An open ground often comes from heat-damaged connectors on the rear bank, so inspect the plug before ordering a new actuator. Unlike P207B, a high code says nothing about the flap mechanics; the valve may move correctly while its feedback is simply not readable.

Likely causes

Sensor ground open at a heat-damaged connector
Signal wire shorted to 5 V or battery voltage
Bank 2 actuator electronics defective

Symptoms

  • Check engine light (manufacturer-dependent)
  • No driveability change in most cases

Repair estimate

DifficultyEasyDIY possible
Parts and labour€20–400
Time0.3–2.5 h

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

Parts involved

imt position sensor

Related codes

P207CP207AP207BP2078

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com.