Hi! I often had the error P0134 with my C70 2.5T 193 PS automatic after the purchase (lambda probe 1 – the one before the KAT). Then I got a new one from Volvo (guarantee power) and had it installed together with the 3″ downpipe + metal cat and the remaining exhaust system. After the conversion sometimes the Lambda probe 2 came as an error message – this was fixed by a distance piece -> it now no longer sits directly in the exhaust stream and the error for the 2nd probe came since the not more. But now almost every day the P0134 reappears – so front probe. If it comes then always when I restart the car! While driving funnyly never! I delete the error then while the engine runs and it does not come back. Today the engine began to stutter at once and took almost no gas… can the Lambda cause such a thing?! I then restarted and it ran quite normal – but P0134 was saved again. Somehow also lacks power between schen 4000 and 5000 u/min seems to me! From 5000 on he pulls through again and pushes cleanly?! LMM is also a new original installed… Does anyone still have a tip? Could the TCV be to blame or the Lambda probe loose? She came as said into a new 3″ downpipe… but normally they burn themselves rather hard than that they become loose, right? The tuning company is unfortunately on holiday until the beginning of January… so I would like in the meantime even a little after the mistake su thanks to all professionals LG Peter