Question about 1993 Saturn SL1

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Please Help... p0404 and p0137 Error Codes (1999 Saturn SL1)

P0404 exhaust gas recirculation control circuit range/performance
p0137 02 circuit low voltage (bank 1, sensor 2)

I just replaced the 02 Sensor in front of the catalytic converter, but these codes continue to trigger my engine light. I think that the p0137 code is for the O2 sensor that's behind the catalytic converter, but I'm not 100% sure. Anyways, are these two codes related? Is this an electrical problem or do I need to replace my EGR and other O2 sensor? Does someone know the solution to this problem?

Note: It's a 1999 Saturn SL1, the website would not let me select the proper model year.

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  • pat1966 Jan 17, 2009

    my engine check light came on and plugged the DTC code machine into the connector and it says 'P0404' which is exhaust gas recirculation circuit range/performance. Should i replace the EGR valve or clean it??

    i drive a 2004 Chevy impala.

  • Anonymous Mar 15, 2014

    1992 saturn sl1 engine light cant get to go off i have replaced pc sensors about evething i can replace it keep telling me powere steering sensor i have replaced the hole power steering pump

  • Anonymous Mar 18, 2014

    how do i fix this problem

  • Anonymous Mar 31, 2014

    Just bought this vehicle from a used car dealer he said it was the gas cap so I bought a replacement cap and cleared the code and it just keeps coming back on. Any suggestions?

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  • Master
  • 360 Answers

Yes egr valve is a common thing on this saturn. very pricy and yes you need the rear o2 sensor good luck i have a used egr if interested off a sl2

Posted on Sep 29, 2008

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SOURCE: Please Help... p0404 and p0137 Error Codes (1999 Saturn SL1)

hey if you truely think it is your egr valve unhook it and if that is the problem then when it is unhooked it should run better and the codes should not come up. hey if you cahnged the 1 o2 sensor and not the other you probably made the code for the one u repalced come up again. i would recommened that you change both of the o2 sensors at the same time. try checking if your catalatic convert is plugged. how you do this is take a dollar bill and hold it at the end of your tail pipe while it is idleing and if the dollar bill stays still you have a plugged catalatic converter.

Posted on Jan 13, 2009

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Causes:
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Please Help... p0404 and p0137 Error Codes (1999 Saturn SL1)


hey if you truely think it is your egr valve unhook it and if that is the problem then when it is unhooked it should run better and the codes should not come up. hey if you cahnged the 1 o2 sensor and not the other you probably made the code for the one u repalced come up again. i would recommened that you change both of the o2 sensors at the same time. try checking if your catalatic convert is plugged. how you do this is take a dollar bill and hold it at the end of your tail pipe while it is idleing and if the dollar bill stays still you have a plugged catalatic converter.

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Disgnostic code meaning


P0404 Exhaust Gas Recirculation Control Circuit Range/Performance
P0405 Exhaust Gas Recirculation Sensor “A” Circuit Low


It sounds like you have a failure of the EGR valve.

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