Punto1958 said:

Hi folks new member here,have fitted a new egr valve and 2 codes still keep coming up p0409 and p0490 common possible cause with both codes is short to power in circuit A,these codes come up with egr valve unplugged or connected can anyone tell me what controls the egr valve is it a relay a modual or a sensor.
Many thanks
Kev.

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Punto1958 said:

Hi chap sorry for the delay replying it's all sorted now,it was a simple thing in the end just take off map sensor and clean carefully everything now works fine.

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