2001 audi a3 failed mot due to high emissions diagnostic codes inside.. Please help

[djfaz112]

Hi guys i had my car ( audi a3 1.6 se 2001) mot`d last week and it failed on emissions.

i have taken it to a local garage and they have done a diagnostics and the following have appeared on the machine

1. 16500 - coolant temp sensor - g62 not plausible signel p0116

2. 17584 - lambda sensor after cat bank 1 limit attained p1176

3. 17978 - engine ecu blocked p1570 intermittent

4. 16554 - fuel trim (bank1) malfunction p0170 intermittant


Can anyone tell me what these codes mean? could it be one failure is causing all 4 to appear.. please bear in mind that the engine light does not sure while engine is on but does stay on when key is turned once on ignition.

Also what am i looking at in terms of cost to have this sort of work done and what would fix the high emissions as a temp fix so i have mot?

Please let me know asap

Thanks

Faz

[zollaf]

i would fit a new coolant sensor, after confirming the sensor is at fault rather than the wiring, then clear the codes and see if that sorts it out.

[djfaz112]

will that fix the emission problem?

[djfaz112]

Spoke to the local mechanic, he advised to get the coolant temp sensor changed.

he advised this is the direct result for the high emissions..

do u think this will lead to the mot pass?

plz let me know thoughts guys

faz