03-01-12, 03:30 PM
Friend of mine has a 2007 Escalade AWD. He had the CEL on the other day, the it went off. I hooked up the scan tool and code p0121 came up which read, "Throttle Position Sensor/TPS, Position Sensor A, CKT Range /Perf" I cleared the code, and the light is not back on. I cleaned the throttle body, and the issue right now is. When first starting up, in park, it idles at around 1800 to 2000 RPM. Put in the park or drive, and the idle drops to around normal or slightly higher then normal. In Neutral, the RPM goes back to 2000. Any ideas?