Question about 2005 Hummer H2
First, code b0100 is a fault in the restraint system. front end sensor, restraint sensing diagnostic module or communication between the 2 are suspect problems po420 is an efficiency problem with catalytic converter. most likely would need new converter, but exhaust leaks and oxygen sensor malfuctions can also set code. if this vehicle is under 80,000 miles and does need converter, dealer should repair for free under warranty. that is federally mandated.
Posted on Dec 04, 2008
Po420 is an catalyst efficiency below threshold an po 100 is a mass air flow code make sure the air cleaner is on right and is tight no leaks
Posted on Dec 04, 2008
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Posted on Jan 02, 2017
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