Helix WRX STI O2 Sensor CEL Fix 2004 +
[HEL-CEL-FIX2]
 Our Price: $19.99
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Description:Helix WRX STI O2 Sensor CEL Fix 2004 +
[HEL-CEL-FIX2]
When you change out your exhaust to one without a Catalytic Converter(CAT). You will get a Check Engine Light(CEL) with a OBDII code of PO420(CAT inefficientsy). This CEL fix will prevent the ECU from tripping the code. By tricking the ECU into thinking your CATs are working fine. Must be soldered in between the O2 Senor and the ECU.
For off-road use only.

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