Codes 1128 + 1130

[ilvoelv]

Hi all,

So my CEL light went on my 2001 Porsche Boxster (64K miles) last month and I never got a chance to go to a mechanic and fix the problem. Autozone read codes 1128 and 1130. I was told the 02 sensors were the issue.

After reading some threads I'm wondering if the MAF can be the issue?

Nothing different about the drive, not any leaks I see, nothing unusual about the smoking on the car (but about 2 months ago I didn't drive it for about a week and the smoke was insane..)

Any help would be appreciated.

[mikefocke]

The 1128/1130 codes causes are listed as...in this order...

– Incorrect signal from MAF sensor
– Intake air system leaking
– Fuel pressure too low
– Volume supply of fuel pump too low
– Fuel injectors fouled
– Exhaust system leaking

So who told you the O2 sensors were suspect?

[ilvoelv]

Autozone!

[Fullthrottle52]

I have been battling the same codes for 2 months now. At this point I cleaned the MAF sensor and put a new air filter in. Cleared the codes and that lasted about 2 to 3 weeks. CEL came back with same codes. My indy then did a smoke test and found a leak (3 in cut) in the oil fill tube. Replaced this and the codes came back again in 2 days. He wanted to replace the AOS but I said let's do a new MAF sensor. He agreed and we put in a new one 2 weeks ago. So far no light. I will give it another 2 weeks before I say this issue has been taken care of.
I am not a mechanic, but I would smoke test it first. Then go from there.

Keep us informed.

[dharder]

Had the same codes. Chased my tail for a while. Turned out to be a MAF sensor. It's reasonably inexpensive and very easy to change...

[Umbakrail]

Had the same codes. Turned out to be air leak on brake booster vacuum line and also on air/oil separator with a smoke test. Changed both and problems are gone

[Dale_K]

I've had the codes. Smoke test first and fix everything it reveals but you still might have a MAF sensor problem. Don't do the MAF until the genuine leaks are fixed. Mine had them on the oil fill tube, brake booster and Tip coolant control valve. The smoke test only cost $75 and was worth it.

My car would still throw the codes and I bought a Durametric. There were no specific MAF sensor codes but the values coming from the MAF were not consistent with a vacuum leak. My car showed rich low and lean high, which is backward from how a vacuum leak would work. After I replaced the MAF (cleaning didn't work) the values instantly went into the normal range.

[ilvoelv]

Thank you all for your responses, its appreciated. I'm going back to the mechanic tomorrow and will have them do a smoke test. When I turned on the car today a good percent of the smoke was white and had a oily smell to it so I'm scared it might by the AOS.

[ilvoelv]

Thanks to the hurricane I've been unable to see a mechanic. Just yesterday when I was moving my car the airbag light turned on. I looked it up and found that if the seat belt receptacle is jammed it could be it. Its been jamming lately so that could be it. Any thoughts?