Audi A6 C6 (2008) 2.0 TFSI - check engine light

Codpeas

Ok, so the light has been on a few times in the last couple of months with various work applied so here's what's happened so far:

Light came on and checking under the bonnet there were a couple of obvious problems such as coolant very low and oil on the top of the engine. Coolant topped up and oil level checked and coolant level dropped again so brought to local garage.

Garage found thermostat housing was leaking, valve cover gasket needed replacing and a problem with the PCV. They sorted all of that and all was happy again.

Light came back on a week later and engine was running a little rough so I looked back through my service history and decided that spark plugs hadn't been replaced in quite a while and also after some reading decided it was time for the ignition coils to be replaced (3 were still the factory ones). So I sourced the parts and did that lot myself. All was happy again and the engine was running noticeably smoother.

Now, light is back on again. The engine is still running smoothly and the oil and coolant issues are still ok so my thoughts move to the injectors but that's purely speculation.

Can anyone recommend someone that really knows their way around Audi petrol engines and would be able to diagnose and fix the actual problem - I'm trying to avoid the 'well we can try this' type approach as I would prefer not to have to take out a mortgage to get it properly sorted. I need the car to keep going for another couple of years as it's not my turn for a replacement (wife just got a new car) so don't mind putting money into it once it's well spent. Preference for someone/somewhere Dublin based.

Once I sort this out then attention moves to the suspension and steering - there are at least a few bushes/bushings/whatyamacallits that could probably do with replacement at this stage (still flies through it's annual NCT - so far) so any recommendation on places to get that stuff evaluated/fixed also appreciated.

Thanks!

Atlantic Dawn

Could literally be anything, leak in exhaust, emissions, spark plugs coil packs etc. The fault code reader will pinpoint where the issue is and save blind diagnostics on the car, very handy to have when doing DIY work on your car, something like this will do the basics...

https://www.micksgarage.com/d/multimeters-and-electronic-tools/products/3383940/obdii-car-diagnostic-tool-with-large-display-and-code-explanation-multi-lingual?loc=ie&gclid=EAIaIQobChMI-Juqxfiv9wIVRWHmCh3A1QyGEAQYAiABEgJFq_D_BwE

User1998

Just get a mechanic to diagnose the issue with a diagnostic code reader instead of guessing

Codpeas

Thanks for the comments guys.

Just to clarify, I'm not looking to do anything further on the car myself and want to eliminate guessing. Some of the fault codes can have a list of possible causes and I would like to avoid the situation where someone works through those replacing parts at my expense until they find the actual cause/problem - I have experience of that in the past with another car. I replaced the plugs and coils myself as they were well overdue anyway and I figured I might save myself a few EUR while doing something more interesting than changing a bulb - was a bonus that it helped.

My hope is to get a pointer to someone who knows this type of engine well and will be able to do some diagnostics beyond using a code reader.

A garage I have used many times, and would generally rate highly, surprised me some years back when replacing a malfunctioning injector in that they had no knowledge of the procedure for injector removal and made it up as they went along - luckily they had quoted the cost up front, and honored that, as they said if they had to do it again they would charge twice the amount and it wasn't pocket change to begin with.

User1998

A lot of codes are straight forward and don’t require eliminating/guessing.

I know how frustrating and costly the whole elimination and guesswork can be. Its good to find someone who specialises in your make/model. There should be someone here who will point you in the direction of a good VAG Specialist.