P207B Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Range/Performance (Bank 2)

On bank 2, the valve feedback is electrically valid yet does not match what the flap should be doing, for instance it changes too slowly, sticks at an intermediate value or disagrees with the commanded state. No manufacturer documents P207B. The closest documented logic is GM's bank 1 code P2076, which fails the actuator learn sweep when the reported position lingers inside the 5-35 % band for five seconds, or when learning restarts ten times in one key cycle. A plausibility code like this often points at mechanics rather than electrics: a flap that binds or a slipping coupling falsifies the movement profile even with an intact sensor. Compare with P206E/P206F, which judge the end positions of the same flap.

Likely causes

Symptoms

• Check engine light (manufacturer-dependent)
• Possibly uneven power delivery

Repair estimate

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

Parts involved

Related codes

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