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P0139 p0159 codes

5K views 4 replies 3 participants last post by  davealfa11 
#1 ·
p0139 o2 sensor circuit slow response (bank 1 sensor 2)
p0159 o2 sensor circuit slow response (bank 2 sensor 2)

GOT BOTH THESE CODES :(

and yes i assumed air leak in exhaust,electrical wiring,im curious why same fault ,
emmisions are bang on MOTed other day and passed,
could it be that im in for new diagnosing lambdas 70ish notes a pop:(

any help be appreciated

ps cant get on my alfadiag cos good old mcafee say its a trojan , and using fiatscan me 7.3.1,so im just a bit miffed whether to believe,results even though error codes duplicate on other alfa's ive hooked up to
 
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