GX - 1st Gen (2003-2009) Discussion topics related to the 2003 -2009 GX470 models

Trouble Codes P0031 and P0051 - help

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Old 12-05-16 | 03:10 PM
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okiegx
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Default Trouble Codes P0031 and P0051 - help

My 2004 is showing P0031 and P0051, both of which are H02S Heater control circuit low - I'm guessing it's bad fuse, or relay, but can't figure out which relay or fuse it is... any help?
Old 12-05-16 | 05:28 PM
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It is your O2 sensor(s) went bad.
Old 12-05-16 | 05:31 PM
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You think both would be bad?
Old 12-06-16 | 04:35 PM
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Possible. Replace one and read the code again.
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