Volkswagen Golf IV 1.6 SR 8V - Rippling speed on a cold engine.

Hello. Today's patient is a Volkswagen Golf IV 1.6 SR 8V with an automatic transmission. The problem relates to jumping revs on a cold engine, it also dims and you have to keep it on the gas for a while so that it does not go out. Fuel consumption is within 12l / 100km. I hooked it up today and I got the following errors:

-17698 Engine temperature sensor - signal too small - sporadic error
-17832 Additional air injection system 1- leakage - sporadic error
-17549 Power calculation - improbable value - intermittent error
-16556 System too rich (page 1) - no / not hardware related
-Fuel level sensor range / possibilities- sporadic error
-16556 System too rich (page 1) - intermittent error
-17978 Control module blocked - intermittent error
- Exhaust gas recirculation sensor - signal too small - sporadic error.

The car has a gas installation. I would like to add that on a warm engine it also happens a little longer to turn or go out. Please help me because my hands are dropping. Thanks in advance and regards.

Left air symptoms. Often, the suction pipe between the throttle and the flow meter needs to be replaced - the vent valve in it becomes leaky. For this the plug of the liquid sensor is rotten, or the sensor itself.

Damper cleaned?

I did not clean the throttle.

Do this, just adapt afterwards.

I bet on left air. Regards, Bart.