P2021Intake Manifold Runner Position Sensor/Switch Circuit Low (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- 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.
- What you may notice
- Check engine lamp on
- Slight loss of low-end torque
- Likely causes
- LikelyBank 2 signal wire grounded
- Possible5 V reference to the bank 2 sensor open
- PossibleBank 2 position sensor internally shorted
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.