Questions & Answers for: Pontiac catalyst

obd not ready won't pass inspection 2001 Pontiac Grand Am Went for Inspection sticker in MA. Catalyst, O2 and one other not ready. Failed Inspection, Mechanic said battery must have been disconnected

the car excelerates then feels like it short off and shuts down code reader gave me this code p305 p420 P0305 is a misfire on cyl. # 5 P0420 is catalyst efficency below threshold

...on my 2001 toyota sienna and would like to know the drive cycles for the evap monitor and the catalyst monitor. Please help cannot pass emmissions and plates are now expired. ugh. Converters

check engine code 0420 catalyst below threshold (bank 1) p0420- There are a number of things that could be causing this p0420 catalyst efficiency code. The most common thing is the catalytic converter

...and what I need to fix on my car P0128 ECT Sensor Below Thermostat Regulating Temperature P0420 Catalyst System Bank 1 Low Efficiency P0455 EVAP System Large Leak (0.080") Detected For the

trouble code po420 2007 solstice P0420 - Catalyst System Efficiency Below Threshold Bank 1http://engine-codes.com/p0420.htmlForum CodeForum CodePossible causes- Three way catalyst converter Bank 1 - ...

the catalyst and evap monitor will not run on my grand prix is been two weeks now after an evp vent valve replacement and repair does any one know why well the car needs an emissions test it fails for

replaced, but still running hot, what to fix or look for next? You could try to change or empty the catalyst, if it's old and never changed, this could be the problem, as the exhaust won't let

won't pass emissions test. what is the catalyst evap? it all part of your exhaust system, replace entire thing from motor to tailpipe and be done with it. catalyst evaporator is part of the catalytic ...

where is the catalyst evap? on a my car will not pass emissions test and it reads the problem is the catalyst evap, where is this located These are two separate systems. Catalysts and EVAP. Codes help