P20DC: The exhaust after-treatment fuel power supply control has got stuck
The exhaust after-treatment fuel power supply control has got stuck. It is usually dirt, wear or the motor that moves it.
| Code | P20DC |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
How to read and clear P20DC with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P20DC with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P20D8 The exhaust after-treatment fuel power supply control gives readings outside
- P20D9 The exhaust after-treatment fuel power supply control gives a lower signal than
- P20DA The exhaust after-treatment fuel power supply control gives a higher signal
- P20DB The exhaust after-treatment fuel power supply control has got stuck
- P20DD The exhaust after-treatment fuel pressure sensor has an electrical fault
- P20DE The exhaust after-treatment fuel pressure sensor gives readings outside the
- P20DF The exhaust after-treatment fuel pressure sensor gives a lower signal than
- P20E0 The exhaust after-treatment fuel pressure sensor gives a higher signal than
- P2002 Diesel particulate filter efficiency below threshold (bank 1)
- P2003 Diesel particulate filter efficiency below threshold (bank 2)
- P2004 Intake manifold runner control stuck open (bank 1)
- P2005 Intake manifold runner control stuck open (bank 2)
What does code P20DC mean?
The exhaust after-treatment fuel power supply control has got stuck. It is usually dirt, wear or the motor that moves it.
How do you clear P20DC?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P20DC comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
