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2003 Forester X Automatic
36 Posts
Discussion Starter · #1 ·
Hello folks, 2003 Subaru Forester X. Got a P0030 code and replaced the oxygen sensor with a Denso sensor.
Cleared the code with my scanner and then drove around for a bit. CEL came back on and now I have P0030 (again) and also P0037.
Had the car for a few years and never had any issues regarding these codes.

P0030 = Heater Control Circuit Bank 1, Sensor 1
P0037 = Heater Control Circuit LOW Bank 1, Sensor 2
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