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Old 02-08-2010, 08:22 AM   #1
paulo
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Default error codes

I have a 2003 Ion with 95,000 miles. CEL light on and pulled 4 error codes. The last two I was able to erase, but the first two I could not erase.
P0031 /Poo37 last two are P0135/ P0141. What do these codes mean and why am I unable to erase the first two codes? How can I erase them?

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Old 02-08-2010, 10:09 AM   #2
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2003 L-Series 3.0L Sedan
Default Re: error codes

P0031....HO2S Heater Control Circuit Low (Bank 1 Sensor 1)

P0037....HO2S Heater Control Circuit Low (Bank 1 Sensor 2)

P0135....O2 Sensor Heater Circuit (Bank 1 Sensor 1)

P0141....O2 Sensor Heater Circuit (Bank 1 Sensor 2)

All related to O2 sensors. Check wiring to both sensors and the fuse(s). Does the engine run OK?

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Old 02-08-2010, 10:09 AM   #3
2006 ion2
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2007 ION-2 Sedan
Default Re: error codes

www.google.com for the meanings, you can erase them all you want, if there is a problem, it just puts them right back into memory.

...
2007 Saturn Ion 2
2003 Chevrolet venture lt

trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

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Old 02-08-2010, 11:43 AM   #4
paulo
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Default Re: error codes

The engine runs fine. No noticable problems. Does this car have the fiber tip CTS (coolant temperature sensor)? It seems unlikely that both O2 sensors would go bad together. Is there a fuse that runs both O2 sensors?

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Old 02-08-2010, 11:59 AM   #5
2006 ion2
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Default Re: error codes

the cts is an s series problem, not ions

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2007 Saturn Ion 2
2003 Chevrolet venture lt

trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

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Old 02-08-2010, 12:00 PM   #6
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Default Re: error codes

Are there specific fuses that run the O2 sensors? and could that be the reason why two of the error codes won't reset?

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Old 02-08-2010, 01:37 PM   #7
2006 ion2
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Default Re: error codes

I don't know that they would be fused. they send off a really small signal as far as I know.

...
2007 Saturn Ion 2
2003 Chevrolet venture lt

trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

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