P0350-55 are all cylinder misfire codes. P1053 -Engine trouble code P1017 - Could be MAF failure P1021 - O2 sensor error P1026 - ETM sensor issue I have linked a thread on a similar issue for you to read. https://www.matthewsvolvosite.com/forums/viewtopic.php?f=1&t=22539 Did you have the ETM reb...