Regarding the error code, did you read the code to see what the problem is? I am almost certain that your idle problems will return a code to the ECU.
Things to check for idling issue (after checking ECU and checking the subsequent ECU error).
- TPS
- vacuum hoses
- MAFS
- AIV
- head temperature sensor
- air temp sensor
Does your car give off dark smoke when its idling bad? Does your rpm fluctuate?
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