K93394430
Service Bulletin Details
Public Details for: K93394430
Engine brake - diagnostic trouble code (dtc) P1021-11 volvo compression brake (vcb) control circuit short to ground - us17+obd16 through us17+obd19 emissions, model years 2018 to 2020
Models from 2020
2020 VOLVO VAH |
2020 VOLVO VHD |
2020 VOLVO VNL |
2020 VOLVO VNM |
Models from 2019
2019 VOLVO VAH |
2019 VOLVO VHD |
2019 VOLVO VNL |
2019 VOLVO VNM |
Models from 2018
2018 VOLVO VAH |
2018 VOLVO VHD |
2018 VOLVO VNL |
2018 VOLVO VNM |
Solution K93394430 Tuesday, July 2, 2019 8:07:11 PM CEST ** SOLUTION ** Title Engine Brake - Diagnostic Trouble Code (DTC) P1021-11 Volvo Compression Brake (VCB) Control Circuit Short To Ground - US17+OBD16 Through US17+OBD19 Emissions, Model Years 2018 To 2020 Mack Models Mack Model MRU - TerraPro , TE - TerraPro , AN - Anthem , CHU - Pinnacle, Axle back , CXU Pinnacle, Axle front , GR - Granite , GU - Granite , PI - Pinnacle Volvo Models Volvo Model VNL , VNM , VAH , VHD Emission Standard Emission Standard US17+OBD16 , US17+OBD18 , US17+OBD19 Engine family Engine family 13L Engine , MP8 ** SOLUTION ** Cause The VCB circuit wires may rub on the air compressor supply pipe bracket, resulting in a short to ground circuit issue. Solution Once the circuit issue has been confirmed repair the damaged wires and move the harness away from the bracket so no further rubbing occurs. Refer to the pictures below Charge Air Cooler Pipe Bracket VCB circuit wire with rub fatigue Solution visibility Dealer distribution Support Area Americas Function(s)/component(s) affected Function affected MID 128 – EMS , wiring harness , engine brake Function Group Function Group 2861 Engine Wiring Harness , 2864 Bracket Customer effect Main customer effect fault code/display Fault Codes And Error Codes OBDII Diagnostic Trouble Codes (P, U, B Format) P1021 Conditions Vehicle operating mode stationary speed , cruise control , acceleration , with speed limiter , deceleration , whe n stationary , when activating the retarder , when deactivating the retarder , retarder activated mode , during disengagement , during engagement Administration Author UT1558V Last modified by RU4469V Creation date 22-02-2017 15:02 Date of last update 01-07-2019 17:07 Status Published