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Q: My car has the OBD-II codes P0030 and P0135 for the heater control circuit and sensor. Where is this sensor located?

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obd2 codes p0135 and p0030 keep coming up I tried unplugging and re plugged the relay in the fuse box but the light keeps coming on . how do I fix

My car has 54000 miles.
My car has an automatic transmission.

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