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What does the U0100 Lost Communication With ECM/PCM “A” mean? The U0100 code means “Lost Communication With ECM/PCM ‘A’.” In simple words, one or more control modules in your vehicle stopped receiving expected messages from the engine control module or powertrain control module. A module expected to receive regular messages from the engine or powertrain…

What does the U0400 Invalid data receive mean? The U0400 code means “Invalid Data Received.” Unlike many OBD-II trouble codes that point to one sensor or one circuit, U0400 is a network communication code. It means one control module received information from another module, but the receiving module decided that the data was wrong, missing,…

What does the P0109 Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent mean? DTC P0109 is defined as “Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent.” In plain terms, the ECM has detected an unstable MAP/BARO sensor signal that intermittently falls outside its expected operating pattern. The MAP sensor monitors the intake manifold’s absolute pressure (engine vacuum). Under load (throttle open, higher RPM)…

What does the P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input mean? DTC P0108 is defined as “Manifold Absolute Pressure/Barometric Pressure Circuit High Input.” In plain terms, the ECM has detected a MAP sensor signal voltage that is above its normal range for given engine conditions. The MAP sensor monitors the intake manifold’s absolute pressure (engine vacuum). Under load (throttle open,…

What does the P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input mean? DTC P0107 is defined as “Manifold Absolute Pressure/Barometric Pressure Circuit Low Input.” In plain terms, the engine computer has detected that the MAP sensor output voltage is below its normal operating range. The MAP sensor monitors the intake manifold’s absolute pressure (engine vacuum). Under load (throttle open, higher…

What does the P0106 Manifold Absolute Pressure/Barometric Pressure Range/Performance Problem mean? DTC P0106 is a generic OBD‑II code indicating a MAP/BARO sensor range or performance issue. In other words, the engine control unit (ECM/PCM) has detected that the manifold absolute pressure (MAP) or barometric pressure (BARO) sensor reading is not within the expected range for…

What does the P0105 Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction mean? OBD-II code P0105 stands for “Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction.” It’s a generic powertrain code on all OBD-II vehicles. It means the ECU (PCM) has detected a fault in the MAP/BARO sensor circuit (e.g. stuck low/high, open/short, or an implausible signal). The MAP sensor monitors the intake manifold’s absolute pressure (engine…

What does the P001C Camshaft Profile Control Circuit High Bank 1 mean? The P001C code means the engine computer has detected a higher-than-normal voltage in the “A” camshaft profile control circuit. Because the signal is too high, the ECM cannot correctly control the camshaft profile switching. What Does Bank 1 Mean? On engines with more…

What does the P001B Camshaft Profile Control Circuit Low Bank 1 mean? The P001B code means the engine computer has detected a lower-than-normal voltage in the “A” camshaft profile control circuit. Because the signal is too low, the ECM cannot properly operate the camshaft profile control system. What Does Bank 1 Mean? On engines with…

What does the P001A Camshaft Profile Control Circuit/Open Bank 1 mean? The P001A code means the engine computer has detected an open or broken electrical circuit in the camshaft profile control system.Because of this, the ECM cannot properly control the camshaft profile, which affects engine performance. What Does Bank 1 Mean? On engines with more…