P2018
Intake Manifold Runner Position Sensor/Switch Circuit Open (Bank 2)
The ECU detects an open circuit on the IMRC position sensor on bank 2. Without position feedback the ECU cannot confirm runner switching and falls back to a default mode.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor element openCommon
- Signal wire openPossible
- Pin pushed back out of connector bodyLess likely
Parts involved
- IMRC Position Sensor B2
- IMRC Wiring
P2018 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.