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Old 06-11-2014, 12:57 AM   #1
Fvoxxi7
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2002 SC2
Default Error Codes

I recently bought a 2002 Saturn Sc2. It had a few problems when I bought it and I have replaced - thermostat, engine coolant temp sensor, front oxygen sensor, spark plugs and wires, flushed the radiator, air filter, oil and filter, trans fluid, and the ac compressor. After doing all that work it ran fine for about two months. I started working on the cosmetic side since I thought I had the mechanical issues fixed. After cleaning my engine bay I noticed that the engine light had came on and it is shooting the code p0130 02 sensor circuit bank 1 sensor 1. although possible, its hard to believe a 2 month old 02 sensor failed. About a month later I am now getting two more errors - p1133 and u1300 both say manufacturer control. any idea what is causing these errors?
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Old 06-11-2014, 02:11 AM   #2
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Default Re: Error Codes

This is what I found DTC P1133 HO2S Insufficient Switching Bank 1 Sensor 1 which is also the O2 sensor. What make sensor did you use as it does not seem to be working or meshing with the system. Denso brand is one recommendation.
I couldn't find the U1300
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Old 06-11-2014, 07:13 AM   #3
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Default Re: Error Codes

I bought a really cheep one off ebay, "Standard" was the brand name, I was looking into an AC Delco brand replacement, would Denso be better?

Also the U1300 from what I've researched seems to be a error generated by the Body Control Module, but I think it resulted from having an old battery that dies a lot.
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Old 06-11-2014, 08:30 PM   #4
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Default Re: Error Codes

1-Car mileage? This may have a bearing on your O2 sensor problem. P0130; . Normal sensor readings will fluctuate between 10-999 mV. DTC P0130 sets when the O2S-1 signal is not consistently fluctuating out of the 300-600 mV range necessary for closed loop fuel control.... The most probable cause for DTC P0130 is contamination. Check for obvious contamination (oil, fuel or engine coolant) by removing sensor. Identify and correct the cause of the contamination if contaminated. High mileage cars may have a well worn catalytic converter that may cause mystery error codes.

2-P1133; Normal sensor readings will fluctuate between 10-999 mV. DTC P1133 sets when the O2S-1 signal has too few switches over a certain length of time....Possible causes of DTC P1133: An intermittent connection or corrosion in the O2S-1 harness connector can set this DTC. Use a scan tool to monitor O2S-1 voltage with engine running at normal operating temperature while wiggling the signal and ground (circuit 413) wire. Make sure the sensor is tight.
The most probable cause for DTC P1133 is contamination. Check for obvious contamination, oil, fuel or engine coolant, by removing the sensor. Identify and correct the cause of the contamination if contaminated. Replace the O2S-1.


3-U1300; DTC U1300 will set if the EBTCM (ABS module), PCM, or SDM (airbag module) detected the Class II circuit in the low state for too long. (Class II circuit shorted to ground).....Diagnostic Aids; Inspect the wiring harness for signs of chafing or broken insulation.

A multimeter can be used to measure O2 sensor output when its fully heated up. In general, the original O2 sensor should be replaced with another direct replacement to reduce/eliminate problems with incompatibility. If there's corrosion, ground connections can affect O2 sensor signals. The U1300 error code may be car battery related or corroded, loose connections causing comm problems among modules the bcm needs to perform diagnostics.
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