Powertrain, generic (extended)

P2016 Intake Manifold Runner Position Sensor/Switch Circuit Low (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2016 says the bank 1 flap position signal sits at the bottom of its range, typically a shorted signal wire or a lost 5 V supply. Ford sets it below 0.24 V after 5 s; the 2014 Touareg 3.0 TDI (CNRB) below 0.15 V. GM's 2018 diesels read a smart swirl actuator whose feedback is a pulse train: a period frozen at 30 ms with 0 % duty in 50 of 62 samples, at least 5 s after the actuator woke and above 11 V, gives a Type B fault. On GM's 2025 SENT sensor a raw value under 1 % in 480 of 600 samples does the same. Chrysler's short runner valve feedback uses it too: a PCM reflash for 2013–2015 Ram 1500 V6/V8 trucks addresses P2016, and a 2023 Ram case traced P2008, P2016 and P2017 together to a spread supply terminal in the valve plug.

Likely causes

Signal wire chafed and grounded
5 V or actuator supply missing (spread terminal, blown fuse)
Position sensor or smart actuator electronics faulty

Symptoms

  • Check engine lamp on
  • Less torque at low revs or flat spot when the runner should switch

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–600
Time0.3–2.5 h

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

Parts involved

imrc position sensorimrc wiring

Related codes

P2014P2015P2017P2021P2008

References: gsi.ext.gm.com, gsi.ext.gm.com, fordservicecontent.com, static.nhtsa.gov.