Saab 9-4X P2138: Symptoms, Meaning, Causes + Diagnosis
P2138 is a generic powertrain code that can affect your Saab 9-4X’s “drive by wire” throttle system. It means that your 9-4X’s “D” and “E” throttle position sensors do not agree with one another on how much far the throttle has been opened. They should have a similar voltage output. In this case, they do … Read more