Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost to diagnose the P2138 2009 HONDA ACCORD code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
When the accelerator pedal is pressed, the Engine Control Module (ECM) opens the throttle valve depending on the Accelerator Pedal Position (APP) sensor signal. As the accelerator pedal position changes, the sensor varies the signal voltage to the ECM.
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