jcolley wrote Keep in mind that voltage delivery issues with the car can cause those throttle actuator errors. The pre drive check that is performed at ignition on (prior to start) opens each actuator fully then closes it to check for full range. The electronics controlling the actuator monitor the current required to move the motor and stores them to develop a curve of current vs. position. The actuator will report back to the DME if the integral of the current curve is abnormally high or low. This is what is done on the "pre-drive check" and a more throrough test performed using ISTA.
Any deviations in system voltage will skew that current curve and could cause the actuator to sell itself out to the DME.
Given the multiple seemingly random modules storing codes, I would have the battery and alternator checked as recommended above.
Once all the other errors are cleared, then go for the throttle actuators. The moajority of throttle actuator failures are mechanical in nature, so to see them lumped in with a bunch of other electrical ones seems suspicious.
Thank you for your reply. I do think my battery is going out the window. I hooked it up to a charger and charged it up and that got rid of the other codes. The only one remaining is a misfire in cyl 1.
Last night I tried to start to car but it went straight into limp mode. First thing I did was change back to stock software. Still went into limp mode. Since the only code was a misfire in cyl 1, I trouble shooted it by swapping cyl 1 & 2 coils. Still misfire in cyl 1. I changed the plug with a new one. Same code. Also for each step I cleared the codes to see what would show up. Any ideas? Also I still get an edc error on the idrive.
