--- title: Commercial Truck | UpFix FAQ's description: Commercial Truck --- [Skip to content](https://info.upfix.com/kb/commercial-truck#main-content) English Show submenu for translations ![logo (2)](https://info.upfix.com/hs-fs/hubfs/logo%20(2).png?width=189&height=56&name=logo%20(2).png) Open main navigation Close main navigation - English Show submenu for translations - Website Website Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [UpFix FAQ's](https://info.upfix.com/kb) 2. [Commercial Truck](https://info.upfix.com/kb/commercial-truck) # Commercial Truck - [Semi-Truck Headlight & Marker Light Control Module Failure – Flickering Lights or No Power | UpFix](https://info.upfix.com/kb/semi-truck-headlight-marker-light-control-module-failure-flickering-lights-or-no-power-upfix) - [Semi-Truck Power Distribution Module Failure – Intermittent Power Loss, No Start, or Electrical Shutdown | UpFix](https://info.upfix.com/kb/semi-truck-power-distribution-module-failure-intermittent-power-loss-no-start-or-electrical-shutdown-upfix) - [Semi-Truck Instrument Cluster Display Failure – Blank Screen, Dead Gauges, or Flickering Lights | UpFix](https://info.upfix.com/kb/semi-truck-instrument-cluster-display-failure-blank-screen-dead-gauges-or-flickering-lights-upfix) - [Semi-Truck ABS / EBS Control Module Failure – Brake System Fault SPN 791 / U0121 | UpFix](https://info.upfix.com/kb/semi-truck-abs-/-ebs-control-module-failure-brake-system-fault-spn-791-/-u0121-upfix) - [Semi-Truck SCR NOx Sensor & Efficiency Fault – P20EE / SPN 4094 FMI 18 Explained | UpFix](https://info.upfix.com/kb/semi-truck-scr-nox-sensor-efficiency-fault-p20ee-/-spn-4094-fmi-18-explained-upfix) - [Semi-Truck DEF Dosing & Heater Circuit Faults – SPN 3364, SPN 4334, SPN 5246 Explained | UpFix](https://info.upfix.com/kb/semi-truck-def-dosing-heater-circuit-faults-spn-3364-spn-4334-spn-5246-explained-upfix) - [Semi-Truck ECM (Engine Control Module) Failure – No Start, Check Engine Light, or Power Loss | UpFix](https://info.upfix.com/kb/semi-truck-ecm-engine-control-module-failure-no-start-check-engine-light-or-power-loss-upfix) - [Semi-Truck Door, Window, and Mirror Control Module Failure – Power Accessories Not Working | UpFix](https://info.upfix.com/kb/semi-truck-door-window-and-mirror-control-module-failure-power-accessories-not-working-upfix) - [Semi-Truck HVAC Climate Control Failure – No Fan, No A/C, or Temperature Stuck | UpFix](https://info.upfix.com/kb/semi-truck-hvac-climate-control-failure-no-fan-no-a/c-or-temperature-stuck-upfix) - [Semi-Truck Lighting or Body Control Module Fault – Headlights, Markers, or Turn Signals Not Working | UpFix](https://info.upfix.com/kb/semi-truck-lighting-or-body-control-module-fault-headlights-markers-or-turn-signals-not-working-upfix) - [Semi-Truck Instrument Cluster Power or Gauge Failure – Flickering, Dead Dash, and Incorrect Readings | UpFix](https://info.upfix.com/kb/semi-truck-instrument-cluster-power-or-gauge-failure-flickering-dead-dash-and-incorrect-readings-upfix) - [Semi-Truck ABS Control Module Fault – SPN 807, SPN 611 FMI 14, SPN 792 FMI 5 Explained | UpFix](https://info.upfix.com/kb/semi-truck-abs-control-module-fault-spn-807-spn-611-fmi-14-spn-792-fmi-5-explained-upfix) - [Semi-Truck Turbo Actuator / VGT Control Failure — Boost Loss, P2563, SPN 641 FMI 7 Explained | UpFix](https://info.upfix.com/kb/semi-truck-turbo-actuator-/-vgt-control-failure-boost-loss-p2563-spn-641-fmi-7-explained-upfix) - [Semi-Truck Communication Loss U0100 / U0101 – No-Start and ECM Failure Explained | UpFix](https://info.upfix.com/kb/semi-truck-communication-loss-u0100-/-u0101-no-start-and-ecm-failure-explained-upfix) - [Semi-Truck Transmission Fault P0700 / TCM Failure — Causes, Symptoms, and Repair | UpFix](https://info.upfix.com/kb/semi-truck-transmission-fault-p0700-/-tcm-failure-causes-symptoms-and-repair-upfix) - [Semi-Truck DPF Soot Load High – Fault Code 2639 / SPN 3251 FMI 15 Explained and Repair Options | UpFix](https://info.upfix.com/kb/semi-truck-dpf-soot-load-high-fault-code-2639-/-spn-3251-fmi-15-explained-and-repair-options-upfix) - [Semi-Truck DEF / SCR Fault SPN 3364, SPN 5246, P20EE — Causes, Symptoms, and Repair | UpFix](https://info.upfix.com/kb/semi-truck-def-/-scr-fault-spn-3364-spn-5246-p20ee-causes-symptoms-and-repair-upfix) - [Semi-Truck Mirror Adjustment and Heater Control Module Failure | UpFix](https://info.upfix.com/kb/semi-truck-mirror-adjustment-and-heater-control-module-failure-upfix) - [Semi-Truck Power Window and Door Control Module Faults | UpFix](https://info.upfix.com/kb/semi-truck-power-window-and-door-control-module-faults-upfix) - [Semi-Truck Trailer Light or Marker Light Malfunction | UpFix](https://info.upfix.com/kb/semi-truck-trailer-light-or-marker-light-malfunction-upfix) - [Semi-Truck Power Distribution Module / Fuse Box Repair | UpFix](https://info.upfix.com/kb/semi-truck-power-distribution-module-/-fuse-box-repair-upfix) - [Semi-Truck HVAC Climate Control Unit Failure | UpFix](https://info.upfix.com/kb/semi-truck-hvac-climate-control-unit-failure-upfix) - [Semi-Truck Lighting Control Module (LCM) and Headlight Module Repair | UpFix](https://info.upfix.com/kb/semi-truck-lighting-control-module-lcm-and-headlight-module-repair-upfix) - [Semi-Truck Body Control Module (BCM) Failure and Repair | UpFix](https://info.upfix.com/kb/semi-truck-body-control-module-bcm-failure-and-repair-upfix) - [Semi-Truck Cluster Reprogramming and Mileage Correction | UpFix](https://info.upfix.com/kb/semi-truck-cluster-reprogramming-and-mileage-correction-upfix) - [Semi-Truck Cluster Screen Display Malfunction | UpFix](https://info.upfix.com/kb/semi-truck-cluster-screen-display-malfunction-upfix) - [Semi-Truck Dashboard Warning Lights Stuck On | UpFix](https://info.upfix.com/kb/semi-truck-dashboard-warning-lights-stuck-on-upfix) - [Semi-Truck Gauge or Odometer Inaccuracy | UpFix](https://info.upfix.com/kb/semi-truck-gauge-or-odometer-inaccuracy-upfix) - [Semi-Truck Instrument Cluster Power Failure and Repair | UpFix](https://info.upfix.com/kb/semi-truck-instrument-cluster-power-failure-and-repair-upfix) - [Turbo Actuator and VGT Control Module Repair | UpFix](https://info.upfix.com/kb/turbo-actuator-and-vgt-control-module-repair-upfix) - [DEF / SCR Control Module Faults in Semi-Trucks | UpFix](https://info.upfix.com/kb/def-/-scr-control-module-faults-in-semi-trucks-upfix) - [Fuel Injector Control Module (FICM) Problems and Repair | UpFix](https://info.upfix.com/kb/fuel-injector-control-module-ficm-problems-and-repair-upfix) - [Semi-Truck Transmission Shifting Issues and TCM Repair | UpFix](https://info.upfix.com/kb/semi-truck-transmission-shifting-issues-and-tcm-repair-upfix) - [Semi-Truck ECM Failure Symptoms and Repair | UpFix](https://info.upfix.com/kb/semi-truck-ecm-failure-symptoms-and-repair-upfix) See less ▼ - [FAQs](https://info.upfix.com/kb/faqs#main-content) - [Shipping](https://info.upfix.com/kb/faqs#shipping) - [How It Works](https://info.upfix.com/kb/faqs#how-it-works) - [Warranty and Returns](https://info.upfix.com/kb/faqs#warranty-and-returns) - [General](https://info.upfix.com/kb/faqs#general) - [Automotive](https://info.upfix.com/kb/automotive#main-content) - [ABS Module](https://info.upfix.com/kb/automotive#abs-module) - [LCD Display](https://info.upfix.com/kb/automotive#lcd-display) - [Instrument Cluster](https://info.upfix.com/kb/automotive#instrument-cluster) - [Climate Control](https://info.upfix.com/kb/automotive#climate-control) - [Mileage Odometer Programming](https://info.upfix.com/kb/automotive#mileage-odometer-programming) - [ECU/ECM Engine Control](https://info.upfix.com/kb/automotive#ecu-ecm-engine-control) - [TCM Transmission Control](https://info.upfix.com/kb/automotive#tcm-transmission-control) - [PCM Power-train Control](https://info.upfix.com/kb/automotive#pcm-power-train-control) - [Semi-Truck Electronics Repair](https://info.upfix.com/kb/automotive#semi-truck-electronics-repair) - [FICM Fuel Injector Control Module Repair](https://info.upfix.com/kb/automotive#ficm-fuel-injector-control-module-repair) - [Power Steering Module](https://info.upfix.com/kb/automotive#power-steering-module) - [TIPM & Fuse Box](https://info.upfix.com/kb/automotive#tipm-fuse-box) - [BCM Body Control Module](https://info.upfix.com/kb/automotive#bcm-body-control-module) - [LCM Light Control Module](https://info.upfix.com/kb/automotive#lcm-light-control-module) - [ECU Programming](https://info.upfix.com/kb/automotive#ecu-programming) - [Tail Light Repair](https://info.upfix.com/kb/automotive#tail-light-repair) - [Tesla Wall Charger](https://info.upfix.com/kb/automotive#tesla-wall-charger) - [Warranty For Automotive Parts](https://info.upfix.com/kb/automotive#warranty-for-automotive-parts) - [Tech Support - Auto](https://info.upfix.com/kb/automotive#tech-support-auto) - [Battery](https://info.upfix.com/kb/automotive#battery) - [Appliance](https://info.upfix.com/kb/appliance#main-content) - [Dishwasher Control Board](https://info.upfix.com/kb/appliance#dishwasher-control-board) - [HVAC/Furnace Control Board](https://info.upfix.com/kb/appliance#hvac-furnace-control-board) - [Stove/Oven Control Board](https://info.upfix.com/kb/appliance#stove-oven-control-board) - [Refrigerator Control Board](https://info.upfix.com/kb/appliance#refrigerator-control-board) - [Microwave Control Board](https://info.upfix.com/kb/appliance#microwave-control-board) - [Massage Chair Control Board](https://info.upfix.com/kb/appliance#massage-chair-control-board) - [Warranty For Appliance Control Boards](https://info.upfix.com/kb/appliance#warranty-for-appliance-control-boards) - [Freezer](https://info.upfix.com/kb/appliance#freezer) - [Fitness](https://info.upfix.com/kb/fitness#main-content) - [Elliptical Control Board](https://info.upfix.com/kb/fitness#elliptical-control-board) - [Treadmill Control Board](https://info.upfix.com/kb/fitness#treadmill-control-board) - [Stair Climber Control Board](https://info.upfix.com/kb/fitness#stair-climber-control-board) - [Warranty For Fitness Control Boards](https://info.upfix.com/kb/fitness#warranty-for-fitness-control-boards) - [Industrial](https://info.upfix.com/kb/industrial#main-content) - [VFD Inverter/Variable Frequency Drive](https://info.upfix.com/kb/industrial#vfd-inverter-variable-frequency-drive) - [Servo Driver Controller](https://info.upfix.com/kb/industrial#servo-driver-controller) - [HMI](https://info.upfix.com/kb/industrial#hmi) - [Warranty For Industrial Equipment](https://info.upfix.com/kb/industrial#warranty-for-industrial-equipment) - [Agriculture](https://info.upfix.com/kb/agriculture#main-content) - [General](https://info.upfix.com/kb/agriculture#general) - [Commercial Truck](https://info.upfix.com/kb/commercial-truck) - [Commercial Laundry](https://info.upfix.com/kb/commercial-laundry) [![Chill listening crop-3](https://info.upfix.com/hs-fs/hubfs/VECTOR%20-%20UpFix%20Registered%20logo-%20transparent.png?width=168&height=55&name=VECTOR%20-%20UpFix%20Registered%20logo-%20transparent.png "Chill listening crop-3")](http://upfix.com) UpFix FAQ's Copyright © 2026, MyAirbags