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Hey Rick did they tell what the codes were eg P012 or something like that was it the throttle position sensor or does your vehicle have fly by wire (no throttle cable) then it could be the throttle pedal position sensor hard to help unless you have more info
hard to fix out of a workshop cause most codes in OBD11 systems relating to throttle codes are normally a electrical fault ( a ECU detects when the voltage to a throttle position sensor is out of range meaning they operate betwwen 0.8v to 4.8v approx if the ECU does not see the correct voltage or lower or higher than expected it will log a code ) and being a throttle code due to safety reasons built into the ECU you will have limited throttle reponse
and that is just the short version
John