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Jerry
Jerry, Master Mechanic
Category: Pontiac
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Experience:  ASE Master tech. 30+ years mechanic, shop forman, service manager
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Pontiac Grand Am SE: I have a Pontiac 2000 Grand Am SE 2.4l

Customer Question

I have a Pontiac 2000 Grand Am SE 2.4l engine with code P1137.
Submitted: 1 year ago.
Category: Pontiac
Expert:  Jerry replied 1 year ago.
Hello and welcome. My name is ***** ***** you for visiting the site, I will be happy to assist you today.
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The PCM has the capability to monitor this process by using a rear Heated Oxygen Sensor (HO2S 2) . The HO2S 2 is located in the exhaust stream past the catalytic converter. The sensor produces an output signal which indicates the storage capacity of the catalyst.
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This in turn indicates the catalyst's ability to convert the exhaust emissions effectively. If the catalyst is functioning properly, the HO2S 2 signal will be far less active than the signal produced by the front Oxygen Sensor (O2S 1) .
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Most times it is just the sensor but I could get you the test if you like.
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Please don’t forget to rate the answer, **** THAT IS THE ONLY WAY I GET PAID **** if you need any more on it, I will be here.
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Thanks and come again, anytime.
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