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mike lucas Posted on Oct 08, 2013
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I have a 02 3.4 chevy impala. my check engine light is on for a bank one o2 sensor. iv replaced the upper and lower o2 sensors twice this week and code is still coming up.also when im driving it feels like the car is starving for fuel and sputters then drives fine for a couple moremiles then sputters again. i thought i bought defective o2 sensor but i bought 4 in one week.. i need to know how to get engine light off by fixing car and stop sputtering. any ideas will help thanks mike

1 Answer

ronald harrison

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  • Expert 45 Answers
  • Posted on Oct 08, 2013
ronald harrison
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Joined: Oct 07, 2013
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I would suggest checking fuel pressure and fuel filter could have little dirt or something clogging fuel and engine light will stay on due to too rich or too lean of fuel/air mixture

  • mike lucas Oct 08, 2013

    i just replaced fuel filter thinking thats what it was and checked my pressure also.. everything seemed on point. no fuel smell. just sputtering.. and throwing bank 1 o2 sensor code when i replaced them twice.. lol

  • ronald harrison Oct 08, 2013

    next thing would be to make sure all injectors are working correctly and make sure getting good spark through all plugs and wires

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5 Related Answers

Anonymous

  • 47 Answers
  • Posted on Sep 26, 2009

SOURCE: check engine light flashing, car shaking and smells like gas

it could be anything have the code checked odds are it is a bad sensor

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Anonymous

  • 19 Answers
  • Posted on Nov 24, 2009

SOURCE: Check engine light on car sputters and lurches as

well by the sounds of it your car is past it and it may be time to replace it...easier said than done! however, i suggest checking all your connections are clean (simply pull apart and spray with conection cleaner)

roadsterred

  • 34 Answers
  • Posted on Jan 15, 2010

SOURCE: 2002 vw passat....starts fine and drives

It appears that your brake booster system has a major vacuum leak which is causing the engine to go lean and stall. Check the hose between the intake manifold and the brake booster. It may be cracked or loose causing outside air to enter the hose when the brake is applied.

Anonymous

  • 617 Answers
  • Posted on Feb 07, 2010

SOURCE: 2001 dodge durango 4.7liter 4x4 i replaced front

bank 1 sensor 2 is the left downstream sensor (1/2) is located in the exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. Now the meaning of this is that your not getting any 12+/12- heating on sensor, which means voltage is supplied to heat sensor up. You have a O2 sensor heater relay, but not getting problem with 2/2 sensor tells me you need to check/inspect the wiring for 1/2 sensor, open wiring for 1/2 sensor and inspect

Anonymous

  • 4044 Answers
  • Posted on Dec 29, 2010

SOURCE: I have a 2004 Spectra.

Well, it is either a timing belt/chain going out or a bad crank position sensor most likely causing the other problems. The O2 sensor may be bad as well but that usually doesn't cause the Misfire. The vehicle on board computer is confused, that is why it is throwing all those codes. and why it gives you that 1166 code which isn't defined. Check the crank position sensor and the timing and timing belt first. Once you have that fixed the rest should clear up.

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0helpful
2answers

2015 Chevy Impala 3.6 l upstream o2 sensor

You have 2 of those and also 2 downstream. You have two banks of cylinders and each one has an upstream o2 sensor and it is located in the exhaust manifold for each bank. Your scan tool should say Bank 1 or Bank 2.

The downstream sensors are after the catalytic converter.

What are the symptoms of a bad upstream O2 sensor? Sensor 1 Sensor 1 is the upstream oxygen sensor. It is the sensor that measures the oxygen content in the exhaust, providing an input to the computer, which determines how to adjust the air/fuel ratio. Sensor 1 is the sensor closest to the engine. Sensor 2 is the downstream oxygen sensor.
Mar 10, 2021

Bank 1, Sensor 1? Upstream or Downstream? - Newparts.com

https://www.google.com/search?q=2015+Chevy+Impala+3.6+upstream+o2+sensor+location

0helpful
4answers

Can a down stream oxyegen sensor cause a rich fuel and give me the po172 code on a 2008 chevy impala 3.

Hi Steven Mays, NO!
9TH GENERATION IMPALA.
THE DOWN STREAM IS JUST TO TEST THIS CAT ONLY
P0172- WAY TOO RICH FUEL TRIM, SCANNED.
A ENGINE + EFI QUESTION AND NO ENGINE TOLD.
3.? IS ENGINE?(typo)
YOU ARE REPLACING PARTS NOT ASSOCIATED WITH FUELING
02 FRONT IS YES. BINGO OR EXHAUST CRACKS NEAR THAT FRONT 02 SENSOR WILL CAUSE RICH ON 100 NEW SENSORS.
FOR A FACT.
THE LOWER INTAKE MATES TO THE UPPER WITH GASKETS THAT ARE NEVER REUSED. DID THEY?

IF DID THAT is WRONG, IT SUCKS AIR,CALLED A HUGE VACUUM LEAK. NO P03XX CODES, NO MISFIRE CODES DTC.
NO VIN TOLD , IT HAS THE ENGINE CODE. THERE.
NO BODY CAN GIVE ACCURATE ADVICE LACKING WHAT ENGINE IS THERE. BELOW GEN9 LIST
JUST GENERIC ANSWERS.
YOUR SHOP LACKS DIAGNOSTIC SKILLS FIRE THEM.
172 IS BANK 1 RICH,
CAUSES ARE MANY. (A generic v6 answer)
  1. no thermostat is good this old, if stuck at 150f sure will be rich.,
  2. fuel pressure too high. and bank2 not failing yet but will soon.
  3. o2 front sensor bad. bank1.only.
  4. 02 exhaust manifold cracks, making 02 there go full lean and EFI max rich, failed
  5. intake port gasket bad, and sucks air like mad and cause that cylinder to go max lean, (too much air) and now misfires, and that sends a slug of air to 02 front and confuse it (efi )
  6. injector leaks, any bank 1. or dead.we do the service manual injector balance test to find that.
  7. spark bad on bank 1,any. plugs bad or COP boot bad or HV wire sets if present.no engine told so must list all.
  8. if you drive 2 or 3 more driving cycles i bet more DTC errors pop
  9. like P0300 misfire.
  10. what I do, is , get engine hot, 180to200f, and make closed loop work on both banks.if not find out why with more tests.
  11. the real scan tool allows live watching PID scan LTFT on bank 1
  12. long term fuel trim. and will be slammed rich.(o2 stucklean)_
  13. then we loop 02 bank 1 scans and PID graph the 02 b1. for seeing it swing fast,(6 times a second )if not find out why here.
see next post for DSO scope 02 signals,or PID scans.




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0helpful
1answer

I have a 2002 Nissan Frontier 3.3l v6 I'm about to change my knock sensor but I also need to change the camshaft position sensor but I'm not positive of where it is located it say bank 1??????

I'm willing to bet you have weak upper O2 sensors & there's nothing wrong with your knock sensor. But if you want, the knock sensor is under the lower intake manifold in the back that is located under the upper intake manifold also called the upper plenum. The lower intake manifold is wedged between the 2 heads and is an enormous pain in the azz to get to. You can check the O2 sensors with a scanning tool that will show you the upper sensors in bank 1 & 2 bouncing electrical current from about .5v to 5v several times per second. Anything less show weak sluggish sensors. The resulting lean mixture causes a knock. Change the sensors and the knock goes away and so does the engine light after you reset it. It took me 6 months to find this problem after replacing everything else including the 6mth old O2 sensors fresh from China. Now I have Bosch. PS The lower sensors went 2 weeks later & I was told any more problems it's the fuel regulator. 2001 Frontier 3.3l v6. No problems since, it purrs like a kitten. I'd suggest the Bosch, it's a special design for that 3.3l engine.
0helpful
1answer

I have a 2002 chevy impala I changed the 02 sensor and my check engine light is still on and reading the same 02 sensor

You should have a primary and secondary O2 sensor, upstream and downstream. Pre-Catalytic converter and Post-Catalytic converter.
Which one did you replace?
1helpful
1answer

Where are the 02 chevy impala 3.8L o2 sensor locations, I only see three. the top bank one sensor 1 is stripped out, how do i get that one out?

you can apply pressure to the sensor while undoing it to force it out or you will have to cut out the thread area and get an O2 sensor bung hole replacement at an auto supply store and weld into place and install a new O2 sensor. bank 1 sensor 1 is located in the front pipe off the manifold that has cylinder #1 on and bank 2 sensor 1 is on the side that cylinder #2 is on like sensor 1. sensor 3 is the one just before the cat.
0helpful
1answer

After fill ups, engine light indicates deffective 02 sensor bank1. On a '04, Dodge Grand Caravan, 3.8.

You must have duel exhast then. Bank 1 is the drivers side and you have a upper and lower o2 sensor. More than likely it is the upper o2 sensor that is the problem.
0helpful
1answer

I have a 05 chevy impala check engine code p0036 n p0142 bank one sensor two which sensor do I replace

If you have access to a scan tool, check the signal voltage for the Bank 1,3 oxygen sensor with the engine at normal operating temperature. Is it stuck low currently? If so, increase RPM for a few seconds and see if it affects the reading. If it begins working with increased RPM, check for holes in the exhaust near the O2 sensor that may cause a false lean. If the exhaust pipe is intact, the sensor is sluggish, replace it. If the Bank 1,3 O2 sensor voltage reading remains low with increased RPM, unplug it and then observe the reading. It should have increased to about 0.5 volts or thereabouts. If it did, check for water intrusion or other connector problems. If none are found, replace the shorted O2 sensor.
5helpful
1answer

Where is the location of the o2 sensor in a 2002 chevy impala 3.8l engine?

if you look on the back side of the engine closest to the firewall there will be one in the exhaust manifold. That one will be the bank 1 sensor 1 O2 sensor.

If you look under the car there will be one right after the catalytic converter. That will be the bank 1 sensor 2 O2 sensor

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

0helpful
1answer

I have a 96 k1500 chevy truck and have 4 codes that pop up on the check engine light randomly. Codes are ckp A signal intermitent, cmp out of range, idle contol rpm to high, O2 bank 1 sensor 1 insuficent...

O2 sensor cross talk bank to bank irregular, change 02 sensor(s).

Sounds like Idle air control sensor bad, All of your codes interact, I would start with 02 sensor.

I would locate a Tech II and run a diagnosis, eliminate guess work.
0helpful
2answers

Check Engine Light - O2 Sensor - bank 1 running lean

you should have three oxygen sensors on your car, one for each bank of three cylinders; should be towards the Y pipe on each exhaust manifold. Additionally you should have one on the exhaust pipe before the cadilitic converter.
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