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Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > Technical Discussion and Customizing your H2

 
 
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Old 05-10-2013, 08:30 PM
PzYkED PzYkED is offline
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Join Date: Jan 2013
Location: Oslo, Norway
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Default Error codes after installing magnaflow cats

Sure could use some input here. Today I got my 04 H2 with 77k km on it back from a local car guy/welder that welded on some magnaflow cats to my original exhaust system. Turned out that both original cats was completely empty (no wonder i didnt pass the emissons test).

I have the diablosport trinity and ran the diagnostic tool after the new cats was installed, i got the codes P0135 and P0155. These codes never appeared before the change of cats. Erased the error codes, checked the connectors and drove around a bit. But the error codes pops back up.

Isnt it highly unlikely that both these sensors would go bad at the same time?
I didnt think that welding on new cats would destroy the sensors, but it sure seems like a possibility now.

Any help much appreciated
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PzYkED
2004 Hummer H2 SUV
LPG Fueled Mostly Blacked Out 37" Toyo MT on 18" Rockstars Cognito steering braces Magnaflow cats Diablotuned (soon Diablew) Rare Parts tie rods
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