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Old 30-10-2009, 12:22 PM
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Gibbmodoll Gibbmodoll is offline
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Join Date: Oct 2009
Location: Madley in Herefordshire Uk.
Posts: 475
Smile VW Passat 20v, engine code ADR.

Customers complaint, rough idle and poor ronning,

Well to start there are 6 codes set, and clearing them all, they will just reset again, the codes are,
P1515 = M/FOLD CHANGE OVER VALVE.
P1527 = CAMTRTER.
P0102 = AIR MASS METER.
P0134 = 02 SENSOR.
P0135 = 02 SENSOR HEATER.
01247 = EVAP.
Looks bad but is it?, we need to start to look at the system, so lets take a look at the air meter, there is air flow at the hand set data, but would you know this is camming from the air meter?.
lets try looking at the MAF with a meter and see if we can find something wrong with it?.
On meter testing there is, and the meter supply is missing, bet this is a fuse, a check was made at the fuse box and a fuse found missing, so all items had no supply, test the units first do not just change them , and then you can .
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