P0490: High signal in the EGR valve control
High signal in the EGR valve control. It is usually the valve, its connector or a cut wire.
| Code | P0490 |
|---|---|
| System | Engine and transmission |
| Group | P04xx, Emissions control |
| Type | Generic: it means the same on every make |
How to read and clear P0490 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 P0490 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
- P048C The exhaust pressure control valve position sensor gives readings outside the
- P048D The exhaust pressure control valve position sensor gives a lower signal than
- P048E The exhaust pressure control valve position sensor gives a higher signal than
- P048F The exhaust pressure control valve position sensor fails now and then
- P0491 Secondary air injection system insufficient flow (bank 1)
- P0492 Secondary air injection system insufficient flow (bank 2)
- P0493 The coolant fan runs too fast because its clutch is locked
- P0494 The radiator fan is turning slower than it should
- P0400 Exhaust gas recirculation (EGR) flow malfunction
- P0401 Exhaust gas recirculation (EGR) flow insufficient
- P0402 Exhaust gas recirculation (EGR) flow excessive
- P0403 EGR control circuit malfunction
What does code P0490 mean?
High signal in the EGR valve control. It is usually the valve, its connector or a cut wire.
How do you clear P0490?
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, P0490 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.
