P2138 2008 Honda Accord Code - Accelerator Pedal Position Sensor 1/2 Incorrect Voltage

Symptoms may include reduced engine power, hesitation or stalling when accelerating, illuminated Check Engine Light, and difficulty maintaining a steady speed.

This code indicates that there is an incorrect voltage correlation between the accelerator pedal position sensor 1 and sensor 2.

Common causes include a faulty accelerator pedal position sensor, issues with the throttle position sensor, wiring or connector problems, or a malfunction in the engine control module.

Diagnosis typically involves checking the voltage readings from the accelerator pedal position sensor 1 and sensor 2, inspecting the wiring and connectors for damage, and testing the throttle position sensor.

It is not recommended to drive the vehicle with this code present, as it can lead to unsafe driving conditions and potential damage to the engine or other components.

Repair options may include replacing the accelerator pedal position sensor, repairing or replacing damaged wiring or connectors, resetting the engine control module, or seeking professional help for further diagnosis.

Resetting the light may temporarily clear the code, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

Repair costs can vary depending on the specific cause of the code, but it is advisable to budget for sensor replacement, wiring repairs, or potential diagnostic fees from a mechanic.

While not extremely common, some owners of 2008 Honda Accords have reported experiencing this code, particularly in vehicles with higher mileage or wear on sensor components.

Depending on the specific cause of the code, some DIY enthusiasts may be able to address the issue by replacing sensors or checking wiring connections, but professional diagnostic tools and expertise may be necessary for a more accurate diagnosis and repair.