Trouble code po125

1998 TOYOTA COROLLA
144,000 MILES • 1.8L • 4 CYL • FWD • AUTOMATIC
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ITOBOY1
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  • 5 POSTS
I have a trouble code of PO125 and need to know what I need to change.
Jul 11, 2017 at 9:06 AM
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HMAC300
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You need to check oxygen sensor in front of catalytic converter. The coolant temperature is too low to go into closed loop. See picture on how to test it.
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Jul 11, 2017 at 9:29 AM