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IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

Code P0172 ?

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Old 07-20-20, 06:58 AM
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JulezLexx
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Default Code P0172 ?
I have no check engine light but code P0172 popped up on my scanner, with a description of system too rich bank 1.

its a 2012 250 with 173,000km. Does this necessarily mean O2 sensors?
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Old 07-20-20, 02:08 PM
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Gville350
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First I'd use an appropriate spray to clean your MAF. Then give it time. If that doesn't do anything, then I'd suspect the O2 sensor.
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Old 07-20-20, 03:47 PM
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primavera
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I'd inspect exhaust and vacuum for leaks first before buying new O2 sensors.
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