What does P0171B and P1133 mean I have a GMC Envoy 2004 please help

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Hi,

Please open your fuse box to check if you notice any fuses that are discolored or (potentially) burnt. if you find one, that fuse might be linked to the dome lights.

To be sure, please call your local advanced auto parts to verify the fuse # is correct and then you can order the fuse through advanced autoparts.

Thank you.

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P0134 O2 sensor drivers side before catalytic converters.
PO141 O2sensor drivers side after converter
P1133 insufficient switching of O2 sensors. Will probably
go away once sensors are replaced.

P0171 - Bank 1 system too lean.

P1133 - O2S insufficient switching bank 1 sensor 1

P0171 - Bank 1 system too lean.

P1133 - O2S insufficient switching bank 1 sensor 1

go to autozone and have them read your vehicles computer ,,,or take your battery cables off for 10 minutes then put them on and see if it resets itself ...most likely a code misread on your vehicle

Intake manifold gasket leaking.Replace the intake manifold gaskets.

do you mean the rear hatch.is there no elec.try to use the key on the hatch, if not maybe can get in the back and open or unlock the door manually.please give more info.

I’m happy to help further over the phone at https://www.6ya.com/expert/kenneth_3efc1f8510674f04

Leave 02 sensor alone ,it is doing it's job . It is heated up because of lean fuel mixture due to incorrect engine temp.,replace thermostat before looking further.

P1133 is a slow 02 sensor or a shorted to ground at the PCM to 02 sensor signal. If the 02 sensor does not cycle fast enought it is called a lazy 02 sensor, the only way to test for this is with a digital volt meter or a scanner. if it will not pulse fast enough it will throw the code so Replace the 02 senor on the driver side bank. Bank one. then clear the codes. The code is thrown do to seveal reasons the 02 sensor could be dirty or it just could be worn out, you could pull it and clean it and try it again or just replace it and be done with it. The cost of a heated 02 sensor is $50.00 at a auto parts store or the dealer might charge a little higher but the cost in savings of fuel is well worth it.