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Engine Control System - 5.3L (DTC P0601 - U0107) Expand All (for easy ctrl-f) Collapse All Diagnostic Information & Procedures DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610: ECU Malfunction DTC P0641: 5 Volt Reference 1 Circuit DTC P0650: Malfunction Indicator Lamp (MIL) Control Circuit DTC P0651: 5 Volt Reference 2 Circuit DTC P1106: Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage DTC P1107: Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage DTC P1111: Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage DTC P1112: Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage DTC P1114: Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage DTC P1115: Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage DTC P1125: Accelerator Pedal Position (APP) System DTC P1133 or P1153: HO2S Insufficient Switching DTC P1134 or P1154: HO2S Transition Time Ratio DTC P1380: Misfire Detected - Rough Road Data Not Available DTC P1381: Misfire Detected - No Communication with Brake Control Module DTC P1516: Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance DTC P2101: Throttle Actuator Position Performance DTC P2108: Throttle Actuator Control (TAC) Module Performance DTC P2120: Accelerator Pedal Position (APP) Sensor 1 Circuit DTC P2121: Accelerator Pedal Position (APP) Sensor 1 Performance DTC P2125: Accelerator Pedal Position (APP) Sensor 2 Circuit DTC P2135: Throttle Position (TP) Sensor 1-2 Correlation DTC U0107: Lost Communications With Throttle Actuator Module