Join Date: Jan 2014
Location: South Central PA
p2101 can be set by the throttle body connector having a poor connection.
Get some contact cleaner spray and clean both sides of the connector. CRC Lectra-Motive is great. Then either bow or twist the male pins just a little, so they make better contact, and grease it up with dielectric grease. Then reconnect. Clear the codes and cycle the switch on and off three time with the bar switch remaining on, waiting 20 seconds after each movement of the switch. So the ECM can recalibrate with the throttle body.
You could still have a bad sensor, or broken blade drive in the throttle body. But most often the issue is the connector.
The 1511 just tells you it was in a commanded reduced power state, or Limp Mode.
U1016 is telling you that the ecm lost its ability to communicate its state over the serial buss. Hopefully that is related to the other issue, as it is not user friendly for diagnostics. Breakout box is required to run the diagnostic ladder on it.
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