P2064

DTC P2064, sometimes indicated as P206400 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing reductant/regeneration supply control circuit high.

The "Reductant/Regeneration Supply Control Circuit High" DTC code means that the reductant/regeneration supply control circuit is high. This code may be caused by a number of things, including a bad reductant pressure sensor, a bad reductant pump, a bad reductant solenoid, or a bad reductant valve.
The first step in fixing this code is to check the reductant pressure sensor. If the sensor is bad, it will need to be replaced. If the sensor is good, then the next step is to check the reductant pump. If the pump is bad, it will need to be replaced. If the pump is good, then the next step is to check the reductant solenoid. If the solenoid is bad, it will need to be replaced. If the solenoid is good, then the next step is to check the reductant valve. If the valve is bad, it will need to be replaced.

• P2064: Supply Control Circuit High
• P2064: Reductant/Regeneration Supply Control Circuit High
• P2064: Reductant supply control – circuit high
• P2064 00: Reductant supply control - circuit high