2003 Chevrolet Silverado with engine codes P0120 and P2135

Question

I'm getting both P0120 & P2135 error codes. What does the 'A'/'B' Voltage Correlation mean in the P2135 error code on my 2003 Chevrolet Silverado?

Answer 1

There are two Throttle Position Sensors in your vehicle, the Diagnostic Trouble Code (DTC) will be set when the ECM detects that Throttle Position Sensors 1 and 2 disagree greater than 7 - 10 percent for greater than 1 s.

P0120 Chevrolet Code - Throttle Position Sensor 1 Circuit
Read more: https://www.autocodes.com/p0120_chevrolet.html

P2135 Chevrolet Code - Throttle Position Sensors 1-2 Not Plausible
Read more: https://www.autocodes.com/p2135_chevrolet.html