O2 caution during filter change
When removing the engine oil filter from a 2002-2007 Suzuki Aerio, it is possible to contaminate the O2 sensor, causing DTCs P0137 (O2 sensor circuit low voltage/high voltage, sensor 2, Bank 1) (EVAP leak check model) and/or P0420 (catalyst system efficiency below threshold Bank 1).
The oil can easily drip onto the downstream O2 sensor, resulting in internal contamination.
To prevent contamination, use a folded shop towel to cover the O2 sensor. Allow the engine to cool for a few minutes before servicing the engine oil and filter.
Cover the O2 sensor with a rag before removing the engine oil filter. |
Tags: filter, O2 sensor, Suzuki Aerio, Oil filter, engine
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