Powertrain
Definition only
Lights the check engine lamp
P2D21: Turbocharger Interstage Pressure Sensor A Circuit
Standardized SAE J2012 code · P2Dxx codes
What does P2D21 mean?
The ECM detects a circuit fault on the turbocharger interstage pressure sensor a circuit. Reading cannot be used reliably for control.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Common causes
- High Sensor failed
- Medium Wiring or connector fault
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2D21 on the same make and model first.
P2D21 in the community
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