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P2127, P2128 APP SENSOR EC-837 < COMPONENT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O P2127, P2128 APP SENSOR Component Description INFOID:0000000001537969 The accelerator pedal position sensor is installed on the upper end On Board Diagnosis Logic INFOID:0000000001537970 These self-diagnoses have the one trip detection logic. FAIL-SAFE MODE When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up. DTC Confirmation Procedure INFOID:0000000001537971 NOTE: Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. TESTING CONDITION: Start engine and let it idle for 1 second. 2. Check DTC. 3. If DTC is detected, go to . Diagnosis Procedure INFOID:0000000001537972 1. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. 2. Loosen and retighten three ground screws on the body. PBIB1741E DTC No. Trouble diagnosis name DTC detecting condition Possible cause P2127 Accelerator pedal position An excessively low voltage from the APP • Harness or connectors (APP sensor 2 circuit is open or shorted.) • Accelerator pedal position sensor (Accelerator pedal position sensor 2) • Electric throttle control actuator (TP sensor) P2128 Accelerator pedal position An excessively high voltage from the APP Engine operating condition in fail-safe mode The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 |