P209D

DTC P209D, sometimes indicated as P209D00 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 injection air pressure sensor "b" circuit high.

This diagnostic trouble code (DTC) indicates a problem with the reductant injection air pressure sensor "B" circuit. This sensor is used to measure the pressure of the air that is used to inject the reductant into the exhaust system.
Possible causes of this problem include a defective sensor, a wiring problem, or a problem with the reductant injection system.
If this DTC is detected, the reductant injection system should be checked for faults and repaired as necessary.

• P209D: Reductant Injection Air Pressure Sensor B Circuit High
• P209D: Reductant Injection Air Pressure Sensor "B" Circuit High
• P209D: Reductant injection air pressure sensor B – circuit high
• P209D 00: Reductant injection air pressure sensor B - circuit high