Hi I’m new here so please bare with me... my Octavia has recently started cutting out on me and threw up a load of codes to do with the electrics to the engine... I spent a hour today cleaning the terminals under the bonnet on the fuse carriers and relays ... took her for a test drive I stopped and started a few times and all was good..../ tonight I went to start her and she just turned over but wouldn’t start... on the third try she started... I put my limited diagnostic reader on and read 3 faults...P1602 power supply b+TERMINAL 30: low voltage.

P0685 ECM/PCM POWER RELAY CONTROL CIRCUIT =>-J271:open

P3087 supply relay for engine components: electrical malfunction ...

can anyone help please 

Have you thought about popping your battery on a charger/replacing it first?

 

Sounds like low voltage causing issues?

Thanks for the advice.... the battery is holding a good charge and giving out just over 13volts.... I have since pulled and checked my fuses on the dash board (drivers side) the 40A marked engine looked like it had a waxy coating on the spade connectors...I’ve cleaned them and fingers crossed it might have been that.... I’ve used the car about 6 times since and all seems ok 🤞

well because it kept playing up last week, the car went to a garage (not main dealer) he changed a couple of relays (no difference) then he changed the battery and it seemed to have worked.....great until this morning it cut out coming home .....it would'nt start for about 10 mins....first code P

0685 ECM/PCM POWER RELAY CIRCUIT =>J271:OPEN

SECOND CODE P1531 INTAKE CAMSHAFT CONTROL CIRCUIT OPEN.............. Please can someone give me some advice.