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I have a 2004 pontiac GTO and the code it threw was P0171. Is that a bad o2 sensor???...I dont have cats on it!

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Causes of lean mixture is usually an air leak in the intake manifold.

Posted on Nov 14, 2009

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My 2004 Honda CRV showing code P0133 and P0171


  • P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
  • P0171 System Too Lean (Bank 1)
Hi Michael, After fixing errors you need to reset your computer by disconnecting the battery for a minute or two, Also you'll need your radio code to reset your radio, I hope this helped...........CHEERS..

May 07, 2016 | Honda Cars & Trucks

1 Answer

How do i know if a oxygen sensor is bad verses CAM


Neither have anything to do with each other. The cam sensor is used to fire the injectors. The O2 sensors is for fuel mileage and to monitor the catalytic converter. If the O2 sensor is bad it will throw O2 codes and maybe a cat code (420). If the cat is bad, then only P0420. If the cam is bad it will set a cam code, but the ECM will go in default mode and still run the engine. Bad gas mileage, yes, But will still run. Best way to check a cat is remove the O2 sensor closest to the engine or loosen the exhaust flange. If it runs better, the cat is clogged up. Have the codes checked..

Apr 04, 2014 | 2004 Chevrolet TrailBlazer

1 Answer

Engine control fuse keeps blowing pontiac gto


check o2 sensor wires make sure their not melted

Apr 07, 2013 | 2004 Pontiac GTO

1 Answer

I recently had the manifold intake gasket replaced on my 01 grand am. approx 40 miles after it threw a code for bad bank 1 o2 sensor which we replaced, then it gave a code for bad catalytic convertor. We...


It's an o2 sensor code. So you more than likley have burnt wires associated with that o2 sensor.
P1133 = O2 Sensor Fault - Insufficient activity (Bank 1 , Sensor 1)You remove the negative battery connection from the negative battery terminal for 10 minutes.

You ALWAYS reset your computer when you do sensor swaps, when fixed erase code, and see if it stays out. your pcm is getting the wrong info from sensor. good-day !

Aug 16, 2011 | 2001 Pontiac Grand Am SE

1 Answer

I have five codes P2237 P2196 P2271 P0030 P0171 and a P2237 pending code on a 2005 elantra.The car runs poorly, bad gas mileage, sluggish with the check engine light on.Are all O2 sensors bad or maybe the...


P2237 P2196 P2271 P0030 P0171

These are all O2 sensor trouble codes, except P0171 which is a fuel trim code,

You have a bad 02 sensor - up stream - Bank 1 Sensor 1.

Replace it, then road test. The engine computer has a 'default' fuel trim it uses when an O2 sensor fails so it can protect the catalytic converter. If this hasn't been going on too long, good chance simply replacing the O2 sensor will remedy your problem.

Feb 06, 2011 | Hyundai Elantra Cars & Trucks

2 Answers

Service recommendation code p0171 p174 sytem too


2001 Buick LeSabre 3.8L V6 Check Engine Light come on after driving in 20 minutes,error code P0171.....O2 sensors and fuel filter changed ,how can I pinpoint the source.

Feb 09, 2010 | 2001 Hyundai Santa Fe

1 Answer

04 Pontiac Vibe bad gas mileage without a code and then the p0420


that code is from having the plugs wires reversed as you did and the o2 senors regrsitered the overload on gas emmions once you remove the battery cables for about 5 minutes and then recconect and run the engine it should be okay

Jan 19, 2010 | 2004 Pontiac Vibe

2 Answers

98 chevy s-10 codes p0131, p0171, and p1133


Your O2 sensor is starting to go bad .recomend replacement before it gets worse

Sep 24, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

Just changed original cats with direct fit magnaflow


Some systems actually depend upon a certain amount of restriction in order to work properly. The additional flow in the new system will mess with factory set flow expectations. If one of the O2 sensor wires have not been moved and have burned onto an exhaust pipe, You can either ignore the light if it's running well, or take the next (expensive) step and install a programmable engine control unit. However, in many states the light being on will cause you to fail inspection.
If you want to retain the exhaust system, you also could put a reducer in the pipe behind the cat to slow down the exhaust flow. It would not give you the added mpg that an open system will, but may restore the O2 sensor operation and likely you will still have the same sound effect that the system produces. Have a fault scan done...if it shows O2 sensor failure, that's where to go.

Apr 08, 2009 | 2006 Pontiac GTO

1 Answer

2004 gto ls1 motor is running rich and dtc code is P0131


that would be your best bet it is very hard to diagnose a injected v8 with out the right equipment but speaking from experience ( due to the fact we in Australia built these cars) the oxy sensors cause all sorts of problems and swapping them over does't necercarly prove much

Dec 06, 2008 | 2004 Pontiac GTO

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