High RPM at idle

[DonovanPorter]

Morning all

so i done a scan on my Sharan and from it i got the following from my VCDS Scan.

4 Faults Found:
16487 - Mass Air Flow Sensor (G70)
            P0103 - 35-10 - Signal too High - Intermittent
16525 - Oxygen (Lambda) Sensor B1 S2; Heating Circuit
            P0141 - 35-10 - Malfunction - Intermittent
16518 - Oxygen (Lambda) Sensor B1 S1
            P0134 - 35-10 - No Activity - Intermittent
17551 - Load Calculation Cross Check
            P1143 - 35-10 - Upper Limit Exceeded - Intermittent
Readiness: 0000 0000

i have no replaced the MAF and both O2 Sensors, and the car drives like a dream.
however at idle iit sits at about 1500rpm...

at idle it should be about 750RPM.

what am i missing? a vacuum leak maybe.?

any ideas what to check ?

[johnnyroper]

Sounds like a vac/air leak to me.
You need to have a check of all pipes and joints

[DonovanPorter]

i will do a thorough check this evening and ill report my findings