VW T-Roc Error Messages Point to Engine Trouble

Sounds familiar, had nearly identical issues with a 2020 T-Cross with the 1.5 TSI engine. Have some experience with electrical gremlins in VAG cars. The malfunction indicator and multiple system warnings pointed to a control module coding issue in my case. The fault codes showed communication errors between different modules when scanned with an OBD-II scanner at the workshop. Turned out the vehicle coding was incorrect after a software update. The workshop had to reprogram several control modules to resolve the system conflicts. Total repair cost was 360€ including diagnostic time and coding work. To help diagnose your specific case, could you share: Which exact warning messages are you seeing? Did any features stop working along with the warnings? Has the car had any recent software updates or repairs? Are there any performance issues while driving? Getting these details and having the workshop check and reset codes through proper diagnostics should pinpoint if its a similar coding issue. Worth having them specifically verify the control module programming status.

Thanks for that detailed response. Just had the latest service at 120000km and the warnings started showing up right after. Got my own basic scan tool and pulled codes P0171 and P0507. Main warnings are engine system fault and electronic stabilization fault. No software updates that I know of, but definitely noticing rough idle and occasional stuttering during acceleration. The check engine light started flashing a few times during my commute yesterday. Hoping its just a sensor issue rather than something major, given the car only has 124815km on it.

Thanks for the additional details. Based on those specific codes and symptoms after the service, this seems different from my previous coding-related issue. P0171 (system too lean) combined with P0507 (idle speed higher than expected) often points to a vacuum leak introduced during the recent service. Using my diagnostic scanner on my T-Cross showed similar codes when the intake manifold gasket wasnt properly sealed after maintenance. The rough idle and stuttering match these fault codes perfectly. The flashing check engine light is concerning though, indicates potential misfires that could damage the catalytic converter. Before your workshop visit, have them specifically check: Intake manifold gasket integrity, PCV valve and hoses, Vacuum lines that may have been disturbed during service, MAF sensor readings Since you have a scan tool, try clearing the codes. If they return immediately, definitely points to a vacuum-related issue rather than a unusual glitch. The electronic stabilization warning is likely triggered as a cascade effect from the engine management system detecting irregular operation. The workshop should be able to verify with proper engine diagnostics equipment. Repair costs in my case were around 280€ including parts and labor to fix the vacuum leak.

Thanks, thats exactly what I suspected after researching those fault codes. Just cleared them using my scan tool and they came back within 10 minutes of driving. The idle is definitely worse now, hovering around 1100rpm instead of the normal 800rpm. Will make sure the workshop checks all those vacuum-related components during diagnostics next week. Good point about the flashing check engine light potentially affecting the cat. Might try to move up my appointment given those symptoms. Hoping its just a loose connection or damaged gasket from the recent service work. 280€ for a vacuum leak fix sounds much better than a catalytic converter replacement. Will update once the control module readings show whats actually going on.