Code result
P2021
Intake Manifold Runner Position Sensor/Switch Circuit High
Moderate severity
What it means
The IMRC position sensor on bank 2 reports a voltage above the upper threshold — usually a short to positive or an open ground.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Signal shorted to positive
highOne of the most commonly reported causes for this code — check this first.
Sensor ground open
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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