P20DC

DTC P20DC, sometimes indicated as P20DC00 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 exhaust aftertreatment fuel supply control stuck closed.

The exhaust aftertreatment fuel supply control is stuck closed. This can be caused by a variety of factors, including a clogged diesel particulate filter, a defective exhaust gas recirculation valve, or a problem with the fuel injector.
The best solution for this problem is to identify and fix the root cause. If the clogged diesel particulate filter is the cause, it may need to be cleaned or replaced. If the exhaust gas recirculation valve is defective, it will need to be replaced. If the fuel injector is at fault, it may need to be replaced or recalibrated.

• P20DC: Aftertreatment Fuel Supply Control Stuck Closed
• P20DC: Exhaust Aftertreatment Fuel Supply Control Stuck Closed
• P20DC: Exhaust after treatment fuel supply control – valve stuck closed
• P20DC 00: Exhaust after treatment fuel supply control - valve stuck closed