The PLM O2 Sensor Adapter O2-CEL-FIX-ADJ is a must-have for off-road and race-only builds looking to reduce unwanted check engine lights (CEL) from secondary O2 sensors. Also known as a "fouler" or "CEL fix," this adapter threads into your M18 x 1.5mm O2 bung and allows the oxygen sensor to sit further from the exhaust stream, helping to reduce false emissions-related codes.
What sets this unit apart is the 3 included flow inserts that allow you to fine-tune exhaust gas exposure for optimal results. Built from CNC-machined stainless steel, this adapter installs easily using basic hand tools with no cutting, wiring, or welding required.
VEHICLE FITMENT
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Universal Fit
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Threads into any M18 x 1.5mm O2 bung
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Intended for secondary O2 sensor (after catalytic converter)
KEY FEATURES
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Adjustable inserts for exhaust flow control
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Reduces likelihood of CELs on off-road/track builds
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Stainless steel, CNC-cut construction
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Threads: M18 x 1.5mm
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O2 sensor threads into female side
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Length: approx. 1.8 inches
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Easy bolt-on install with no wiring or cutting
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Sold as one complete adapter kit