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Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 17025
Experience:  15 years GM master tech
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P2138 code 2009 Chevy silverado

Customer Question

p2138 code 2009 Chevy silverado
Submitted: 2 years ago.
Category: Chevy
Expert:  Gary replied 2 years ago.

the 2138 code is The voltage difference between APP sensor 1 and APP sensor 2 exceeds a predetermined value for more than 2 seconds

app ( gas pedal sensors built into the gas pedal assembly )

most of these can be cleared up by disconnecting the app sensor at the gas pedal and packing the electrical connection with dielectric grease then plugging it back in and clearing the code

if by some chance the code comes back any the wiring is visually good to the app then it will need the gas pedal assembly changed