1.6 drive squeaking and P1402

[oilit]

So my sons C30 1.6 drive is on 74k miles, and has started squeaking when hot in idle or 1st gear

I put a cheap code reader on it and got the following:-

1402
Raw code: 1402
ECU: 10
Status: Pending fault present, Pending fault present during this driving cycle, Test conditions are met, Test is inhibited by other DTC, Test has not been completed, Validated and stored in non volatile memory, Validated fault present at time of request, Validated fault has been present during this drive cycle
Mini: Heated Catalyst Power Switch Overtemperature Condition (Bank 1)
============2==============
2458
Raw code: 2458
ECU: 10
Status: Pending fault present, Pending fault present during this driving cycle, Test conditions are met, Test is inhibited by other DTC, Test has not been completed, Validated and stored in non volatile memory, Validated fault present at time of request, Validated fault has been present during this drive cycle
============3==============
P1402
Raw code: 1402
ECU: 10
Status: Confirmed
OBDII: EGR Metering Orifice Restricted
Mini: Heated Catalyst Power Switch Overtemperature Condition (Bank 1)



interested if anyone has any guidance - a google pulls up egr valve - but then I read about replacements and still codes coming up?

thanks in advance