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Guessing here, but one side of your electronic throttle "H-Bridge" driver has a short in it somewhere. Possibly both transistors on one side of the bridge are shorting to ground. Given the other codes though, I'd start with system voltage and confirm that first, then look for loose or broken wiring leading to the throttle motor.
Last edited by Mark out West; May 2, 2019 at 09:47 AM.
As Keith pointed out, if you're currently afflicted with this problem, then I'd suggest checking the wiring between the ECU and the throttle-by-wire (ETC) motor on the intake. Look for obvious stuff first, possibly reseat some connectors, that kind of diagnostic. The DTCs point to a non-responsive throttle motor, which I'm assuming is your problem currently.
Given the reliability and redundancy of the throttle-by-wire system, I doubt this will be an "one-shot" problem. HD's Diagnostic tool probably has more detailed information compared with an OBC reader.
Did you or your mechanic do something with the engine before this started?
Last edited by Mark out West; May 2, 2019 at 10:47 PM.
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