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Old 10-09-2010, 11:07 AM   #1
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Maf, P1128, P1130

I have replaced my MAF sensor and an O2 sensor bank 1 before cat because I was getting error code P0133 & P1275. Now I am getting P1128 & P1130. Any suggestions? Doc?
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Old 10-09-2010, 02:33 PM   #2
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New codes indicate engine is running lean in Idle range which usually is caused by vacum leak.
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Old 10-11-2010, 07:47 AM   #3
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I had the same codes. My research showed that the most common cause is a bad MAF sensor, usually remedied by cleaning it - which is what worked for me. Given that you just replaced the MAF I would strongly suspect that the new MAF is a bad unit!

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Old 10-12-2010, 05:41 AM   #4
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is there any walk through detailing where and how to check for vacuum leaks?
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Old 10-12-2010, 09:15 AM   #5
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I don't know of any but if you can get SMOKE sucked into the intake it should be easy to find. there are machines made for this.
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