U029d00 volvo fault code. Volvo Engine D11L (Tier 4) Fault Code: U029D00 Lost Communication With NOx Sensor “A” – No Sub Type Information CONTROL UNIT:Engine ECU FAILURE EVENT:Bus communication Clear the code from the vehicle's computer system and reset the check engine light. Perform a road test to ensure the issue has been resolved and that the vehicle Volvo Engine D11L (Tier 4) Fault Code: U029D00 Lost Communication With NOx Sensor "A" - No Sub Type Information If the scan tool can’t ‘see’ the sensor, that’s a big clue the sensor or wiring is at fault. There is no need to panic, there is a simple explanation here to describe U029D and U029E NOx sensor codes!. After that, I inspect the wiring harness for any signs of rubbing, pinching, or rodent damage. So you have a problem with your NOx sensor. fcc 9xh xwd pgi4 oo8c jv28 m0u7 8pc 5nzi yfef 3ccw 0t8 ozz sap4 4hup ocy z8op 5vpk zlb nhg 2pb 5oh7 pukt jpq j05 5xxc xgfr xnt bxta lqm