OBD-II Generic Error Code P2021: How to Fix It

Q: What does error code P2021 mean?

P2021 means the intake manifold runner position sensor for bank 2 is reading a low voltage or signal, indicating a sensor or circuit problem.

Q: Can I drive with a P2021 code?

Driving short distances may be possible, but it can cause poor fuel economy, reduced power, and potential engine damage. It's best to diagnose and fix promptly.

Q: How much does it cost to fix P2021?

DIY cost for a sensor replacement is typically $50-$150. Professional repair can range from $200-$500 including labor and diagnostics.

Q: Where is the intake manifold runner position sensor located?

It is usually mounted on the intake manifold, near the throttle body. Bank 2 is the side of the engine opposite cylinder #1.

Q: Will a P2021 code clear itself?

The code may clear after several drive cycles if the issue is intermittent, but the underlying problem will likely return. Proper repair is recommended.

Abstract

Error code P2021 indicates that the intake manifold runner position sensor circuit for bank 2 is reading lower than expected. This often points to a faulty sensor, wiring issue, or stuck runner flap, which can affect engine performance and fuel economy.