Powertrain, generic (extended)

P2021 Intake Manifold Runner Position Sensor/Switch Circuit Low (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2021 is the low-signal code for the bank 2 runner position sensor. Ford documents it for vacuum-operated runner control on its V engines in the 2020–2023 summary: the position input below 0.24 V for 5 s, monitored continuously once coolant exceeds 40 °F. In the 2024 edition the same fault is shown as P2019 with failure byte 11. A low reading means the signal line is pulled to ground, the 5 V supply to the sensor is missing, or the sensor itself has failed short. On engines that share one reference for both banks, a simultaneous P2016 points to that common circuit. The ECM stops trusting the feedback and usually leaves the flaps in their default position.

Likely causes

Bank 2 signal wire grounded
5 V reference to the bank 2 sensor open
Bank 2 position sensor internally shorted

Symptoms

  • Check engine lamp on
  • Slight loss of low-end torque

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–500
Time0.5–2.5 h

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

Parts involved

imrc position sensor b2imrc wiring

Related codes

P2016P2019P2022P2011

References: fordservicecontent.com, fordservicecontent.com, law.cornell.edu.