Question about 2003 Chevrolet Impala

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I have a 2005 chevy Impala. I have had both of the o2 sensors changed and the check engine light is still coming on. What else can i do to get it to go of

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I have a 2003 chevy impela with a code of p0757 can you tell me what that is

Posted on May 20, 2013

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Posted on Jan 02, 2017

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SOURCE: 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.

Posted on Nov 20, 2008

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SOURCE: O2 sensor problem

I have a 97 gmc sierra .This truck is the same as the chevy ok.Its a 350 5.7 liter 4x4 Z71.I took it to auto zone which was my first mistake.They put it the scanner and said bad O2 sensor.Ok so which one is it i said.They dont know.Well there four (4) O2 sensors in this truck i hope you know that.I had to replace all four of them before i had to take it to a real shop.It seems the fuel pump i replaced a week earlier with an auto zone fuel pump was bad.Ive changed my feul pump 4 times now and have 235000 miles on still running.You need to get your fuel pressure checked.It should be 65 psi to start it and 55 psi to run it.If the pressures are good it could be a different O2 sensor or maybe the mass air flow senor.My last option would be the fuel pressure regulator because it seems to be a waste of time and money.I would get that fuel pressue checked first.Good luck.

Posted on Nov 25, 2008

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SOURCE: Have a 2003 Chevy Impala. Check engine light

Bank 1 is the rear O2 sensor, but experience says to change both. The front one is right behind the engine in the middle of the engine compartment. The rear O2 sensor is on the top of the exhaust pipe, just behind the catalytic converter. But the same code that shows it is the O2 sensor (which is P0420), is the same code for the catalytic converter, or a vacuum leak. Make sure if you do change the catalytic converter, ensure that the new one is OBD-2 compliant. And the vacuum leak could possibly come from the manifold gasket. Let me know what the problem was!

Posted on Mar 26, 2009

  • 118 Answers

SOURCE: How do i change the Blower motor resistor on a 2005 chevy impala?

The blower motor resistor is located behind the glovebox mounted in the fan housing box under the dash.

Posted on Jul 20, 2009

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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?

Mar 18, 2015 | 2002 Chevrolet Impala

1 Answer

Impala o2 sensor


1. Reduced fuel economy
2. Increased exhaust emissions
3. Poor engine performance
4. Engine check light appears
5. Engine stalls during idling
6. A rotten egg odour emitting from the exhaust
7. Your engine surges or hesitates
8. Rich mixture

Jun 03, 2013 | Cars & Trucks

1 Answer

2005 Chevy Impala LS. Will a bad upper intake cause an engine light to come on. I've been told I need a new Upper intake but currently have no engine light on.


the check engine light comes on when there is an issue with a sensor/sending unit/system/or something the pcm controls. The check engine light does not come on when there is a mechanical issue such as a bad lower intake gasket.

There are times when a mechanical problem can cause a sensor to read incorrectly and cause the check engine light to come on.

Jul 30, 2011 | 2005 Chevrolet Impala

1 Answer

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.

Jul 14, 2011 | 2005 Chevrolet Impala

2 Answers

Where is the O2 sensor Bank 1 on a 2005 chevy impala


BANK 1 UP STREAM OXYGEN SENSOR LOCATION IS LOCATED ON THE REAR EXHAUST MANIFOLD.

May 18, 2011 | 2005 Chevrolet Impala

1 Answer

I have a 2002 chevy impala, I bought the car in december 2008 since i bought it Ive had to change the same o2 sensor about 5 times, the last time i had it changed the engine light came back on 4 days later...


Couple of notes - poor grade of fuel or additives can be coating O2 sensors. Next, when changing sensors are you disconnecting battery? If not a power surge can damage sensor and lastly check wiring harness and make sure wires are all clean and not scared along the way - could be shorting out.

Jan 30, 2011 | 2002 Chevrolet Impala

1 Answer

I have a 2005 chevy impala with miles 147,000 and the check engine light came on


I would have the 2005 Chevy Impala's computer scanned for codes to see what is causing the check engine light to go on. It is not unusual for a 'miss' or an O2 sensor to go bad on such a high mileage vehicle.

Have it checked, though, in order to pinpoint the problem sooner.

Good luck on this repair.

Dec 30, 2010 | 2005 Chevrolet Impala

3 Answers

Have a 2003 Chevy Impala. Check engine light remains on. Scan showed O2 sensor. Could it be a vaccum leak?


Bank 1 is the rear O2 sensor, but experience says to change both. The front one is right behind the engine in the middle of the engine compartment. The rear O2 sensor is on the top of the exhaust pipe, just behind the catalytic converter. But the same code that shows it is the O2 sensor (which is P0420), is the same code for the catalytic converter, or a vacuum leak. Make sure if you do change the catalytic converter, ensure that the new one is OBD-2 compliant. And the vacuum leak could possibly come from the manifold gasket. Let me know what the problem was!

Mar 11, 2009 | 2003 Chevrolet Impala

4 Answers

Loosing power


Wow, I just went through the same problem and guess what it was a clogged converter and a bad oxyegen sensor. The garaged fixed it up for me by putting an eco converter on it and a new O2 sensor. I have a 2003 Chevy Impala,V6 3.8 engine. Good Luck!!!!

Aug 18, 2008 | 2003 Chevrolet Impala

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