OBD-II Error Code P2063: How to Fix Reductant Injector Supply Pressure High

Q: Can I drive with error code P2063?

It's not recommended. High pressure can damage the SCR system, and the vehicle may enter limp mode, reducing performance. Prolonged driving may cause costly repairs.

Q: What causes P2063?

Common causes include overfilled DEF tank, blocked injector or lines, faulty pressure sensor, or a stuck regulator. Less common are PCM issues.

Q: Will clearing the code fix P2063?

Clearing the code with an OBD2 scanner only removes the warning. The underlying issue must be repaired, or the code will return.

Q: Is P2063 the same on all vehicles?

Yes, the basic meaning is the same across OBD-II compliant vehicles. However, specific diagnosis steps may vary by make and model.

Q: How much does it cost to fix P2063?

Costs vary widely. A simple fluid level adjustment is free. Replacing a sensor or pump can cost $200-$800, including labor.

Abstract

Error code P2063 indicates that the reductant (DEF) injector supply pressure is too high. This typically occurs in diesel vehicles equipped with a selective catalytic reduction (SCR) system. The code means the powertrain control module (PCM) has detected pressure above the specified range in the DEF delivery system.