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Fault code U010C00
Fault code U010C00 stands for Lost Communication with Turbocharger Actuator. [1] When combined with your previous code (P113712 - Oil Thermostat Control Short) and your "Check Ign Fuse" warning, these pieces connect to a single root cause: Your engine harness or a shared EMS fuse is compromised, stripping power away from multiple components on the engine block. [2] The Turbocharger Actuator (VGT Actuator) and the Oil Thermostat Solenoid are on the same main engine wiring trunk. When the ECM completely loses contact with the turbo actuator, it registers U010C00. [3, 4, 5] ------------------------------ ## 🔍 How It All Connects to Your "Check Ign Fuse" Warning 1. The Shared Power Wire: The VGT turbo actuator requires direct power and ground to run its electric motor, alongside two CAN-bus data lines. If the oil thermostat valve shorted out internally (P113712), or if the wiring harness rubbed through against the engine block, it will pop the main EMS / Engine Management fuse. [1, 2, 4, 5, 6] 2. The Domino Effect: Once that fuse pops, power is cut to the Turbo Actuator. Because the actuator goes dark, the ECM triggers U010C00 (Lost Communication). Because the ECM detects missing voltage on that entire engine-side key-switch line, it triggers the "Check Ign Fuse" warning on your dash. [3, 6] ------------------------------ ## 🛠️ Where to Look Right Now## 1. Re-inspect the Engine Compartment Fuses (EMS Block) Go directly to the fuse box under the hood on the driver's side firewall. Look for the fuses labeled EMS (Engine Management System) or Engine ECU. One of those fuses is blown. If you replace it and it pops the moment you turn the key on, you have a hard short circuit in the wiring. [6] ## 2. Inspect the Main Wire Trunk (The "Rub" Points) Look at the wiring harness on the driver's side of the engine block near the oil filter housing and tracking up towards the turbocharger. [4] * * Look for spots where the plastic wire loom has melted or rubbed against metal brackets or the engine block itself. * Pay close attention to the branch of the harness that plugs directly into the Turbo Actuator and the Oil Thermostat Valve. [4, 5] * ## 3. Unplug to Isolate the Short If the fuse keeps blowing immediately: * * Unplug both the Turbo Actuator and the Oil Thermostat Valve. * Put a fresh fuse in. * Turn the key to the ON position. If the fuse does not blow this time, plug the Turbo Actuator back in. If it still doesn't blow, plug the Oil Thermostat back in. Whichever component instantly pops the fuse when connected is shorted out internally and must be replaced.