Hello all,

Hoping someone can shed some light on my recent issues.

I have an A3 2.0 Sport FSi 2004, 107k. Owned for 5 years without any problems. Really great car.

A few weeks ago the Emission Control System light came on so I scanned with a VAG-COM eBay system and a mate scanned it with snap-on unit. Both show the same 2 errors:

P1570 - Engine Start Blocked by Immobilizer
P0658 - Actuator Supply Voltage A Circuit Low

Tested the battery and it was below 12.3 volts so replaced it (was also 10 years old) with a brand new unit. I didn't realise before but it was a little slow to crank before the new battery. Reset error codes with snap-on but after an hour of driving the emission light comes on again.

Very grateful for any advise. Have searched the net but no clear opinions have been found.

Cheers, Olly.

 

It may be a bit farfetched, but I had the Immobilizer thing a while back, turned out my keys were a bit heavy and the weight pulled the key down (You know, gravity ) creating the immobilizer error.