[sandor1987]

Ola peeps

i have here a Seat Leon 1.8T 20VT APP engine.   06A906032T
car drives fine till this morning...

i turn on iginition and no EPC light...
so i plug VCDS in and no comm.

i take out ecu and open it. no water in it or some crazy things
so i hook up MPPS and write the ecu in bootmode. 
writing is finish so i put the ecu back to car and he starts.
when i turn of the iginition and back on EPC light is not comming on again...

if i take the ecu back on the bench i can read the dtc with vcds.
the following dtc i can read on the bench.

p1602 - power supply terminal 30
voltage to low - intermittent

p0238 - manifold pressure g31
signal to high

p1517 - power supply relay for ECU
electrical malfunction - intermittent

p1636 - powertrain data bus
missing message from airbag controller

p0113 - intake air temp sensor g42
signal to high

p0118 - engine coolant temp sensor g62
signal to high

p1517 - power supply relay for ecu
electrical malfunction


if i delete all dtc and put the ecu back to the car he starts...
bud when i switch off iginition same problem no EPC and no start...

I suspect the ECU is dying.
could somebody help me out?

[loki954]

you should start by finding the reason for this two 

p1602 - power supply terminal 30
voltage to low - intermittent

p1517 - power supply relay for ECU
electrical malfunction - intermittent