I bought this car with this problem of surging while in Neutral or Park. Ran OBD codes and got several, including 0102, 0113 (MAF and IAT sensor) and 0118, 0123, 0223, and 1122 (having to do with TP sensor and Throttle Control Actuator). Replaced the TP sensor and had the computer "flashed". Still surging in neutral/park so thinking it might be the MAF/IAT sensor. Any thoughts on this? Thanks in advance.
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