P2138 Accelerator pedal position sensor
Connection issue are common problem when this code occurs, there are several. TSB that Buick has produced in addressing this code concern TSB # 07-06-04-019E and 08--06-04-014B.
Here is one of the main cause for a P2138 on a Buick, this is where moisture intrusion tends to set a P2138 code condition
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