P1183 ???
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Teching In
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P1183 ??? I was wondering if anyone would be able to help me out w/ this engine code (P1183 - Fuel/Air Metering). I took my '00 Z28 to get scanned at Auto Zone and the guy there told me it might just be a worn gas cap. Can someone please explain this code and possibly suggest a way to fix it. I appreciate it.
Thread Starter
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I didn't get a good look at the number but I asked him to repeat the code and I wrote it down. I know the scanner read Air/Fuel Metering though...if this helps. Is there anywhere I can get a listing of the codes? According to the guy at Auto Zone, they only have info for codes up to 1000...anything after would have to be taken to the dealer for specifics. Not sure if this is true or not.
Thanks...I've learned a lot in the past couple months from this site.
Thanks...I've learned a lot in the past couple months from this site.
TECH Senior Member
Joined: Dec 2001
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From: Jacksonville, FL
You can look them up by number at www.obdii.com one at a time, gives you a short description - or gearchatter.com for more details and diagnostic information. I came up negative at both for 1183. I'll thumb through my Helms and see if I can find something.
More than likely a P1133 OR P1153...those are the fuel/air metering codes. It's kind of ironic because by TA just threw this codes yesturday. Here is a description from GM service info:
The powertrain control module (PCM) monitors the heated oxygen sensor (HO2S) activity for 100 seconds. During this period, the PCM counts the number of times that the HO2S switches form rich to lean, and from lean to rich. A DTC P1133 or a DTC P1153 sets when the PCM determines that the HO2S did not switch enough times.
A lean-to-rich switch is determined when the HO2S voltage changes from less than 300 mV to more than 600 mV. A rich-to-lean switch is determined when the HO2S voltage changes from more than 600 mV to less than 300 mV. This diagnostic runs once per ignition cycle.
More than likely an exhaust leak within 6-12" of the O2 sensor. If both P1133 and P1153 are set at the same time, a fuel contamination condition is probably present.
The powertrain control module (PCM) monitors the heated oxygen sensor (HO2S) activity for 100 seconds. During this period, the PCM counts the number of times that the HO2S switches form rich to lean, and from lean to rich. A DTC P1133 or a DTC P1153 sets when the PCM determines that the HO2S did not switch enough times.
A lean-to-rich switch is determined when the HO2S voltage changes from less than 300 mV to more than 600 mV. A rich-to-lean switch is determined when the HO2S voltage changes from more than 600 mV to less than 300 mV. This diagnostic runs once per ignition cycle.
More than likely an exhaust leak within 6-12" of the O2 sensor. If both P1133 and P1153 are set at the same time, a fuel contamination condition is probably present.
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I was talking to a buddy of mine yesterday and he was saying I might just need to have the computer tuned. I had the tb ported last saturday at a local performance shop...I got the SES light on Sunday morning while taking the car out for a little cruise. My buddy suggested that the computer might not be able to adjust on its own w/ the increased air flow. Should I go out an purchase a tuner or is this not the case?
