2001 Gmc Sonoma Replaced Cat Last Year Rear O2 Sensor Check Engine Light Came

2001 GMC SONOMA
18,000 MILES
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replaced cat last year and rear o2 sensor check engine light came back on po430 cat below efficiency bank 1 replaced both o2 sensor check engine light came back on same code
Mar 23, 2013 at 9:30 PM
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ASEMASTER6371
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i bet you used an aftermarket cheap cat converter. thats what happens with the aftermarkets. i refuse to use them as they do not contain enough precious metals to last. you need another one. see if they will warranty it for you and if they do be prepared for this again. otherwise, do it right and get a factory cat which will be more money

Roy
Mar 23, 2013 at 9:39 PM
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