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Re: P0240: Catalyst System Efficiency Below Threshold (Bank 1): UPDATE!
To reset the ECU remove the fuse for it (located in the fuse box in the engine compartment) for 20 minutes or so. Doesnt always work but usually does. CEL codes will only go away after a certain number of cycles while driving. Sometimes its a few minutes, sometimes it can take weeks.
For cat converter replacement you are probably better off taking it somewhere and having an aftermarket one welded in. OEM ones can usually be changed fairly easy with basic hand tools since the pipe and flanges are already attached. But, OEM ones cost around $650-750 each (depending on vehicle and transmission). Having aftermarket ones welded in should be much much cheaper.
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--Dave
1999 Rodeo LS 3.2 4x4 5 Speed
32x11.50-15 BFG T/A KO
3" Lift - Rancho 9000x
Rear No-Slip Locker
Flowmaster 2.25" 50 Series
There is a very fine line between "hobby" and "mental illness." - Dave Barry
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