What are the common causes of P2D16?

Carbon buildup in exhaust flow control valve C. A failed valve C actuator motor. Binding in the valve C linkage. A drifting valve C position sensor. A faulty PCM output to valve C.

Command exhaust flow control valve C with a scan tool. Clean carbon from valve C. Inspect the valve C linkage for binding. Compare the valve C position to the command. Replace valve C if it does not follow the command. Clear the code and retest.

P2D16

Exhaust Flow Control Valve C Control Performance

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Hybrid Propulsion

What it means

P2D16 means Exhaust Flow Control Valve C Control Performance.

Where it lives

For P2D16, start at the valve the description names.

Check these first

Carbon buildup in exhaust flow control valve C
A failed valve C actuator motor
Binding in the valve C linkage
A drifting valve C position sensor
A faulty PCM output to valve C

What to do next

Command exhaust flow control valve C with a scan tool
Clean carbon from valve C
Inspect the valve C linkage for binding
Compare the valve C position to the command
Replace valve C if it does not follow the command
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.