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Posted on Aug 21, 2011
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Check engine light on replaced bank 2 O2 sensor plus plugs,fuel filter and air filter, light came back on after only 40 miles. Is there something that needs to be reset when an O2 sensor is replaced?

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  • mandec Aug 21, 2011

    the code was off but comes back on after driving only 40 miles

  • mandec Aug 21, 2011

    back to the original question is there a reset that needs to be done after the O2 has been replaced

  • mandec Aug 21, 2011

    I'll try this solution

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3 Answers

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Hello and welcome to FixYa!
You may need to drive it for atleast another 20 miles to reset the system. If the problem still persists, I strongly suggest that you remove the positive battery connector and let it sit for atleast 5mins. before reconnecting it. This will reset the system and can get the check engine light.
Hope this helps and thank you for using FixYa! Have a good one!

  • Anonymous Aug 21, 2011

    Alright. good luck on the vehicle.

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ZJ Limited

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  • Posted on Aug 21, 2011
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CHECK ENGINE litgh turn on could be several message about fault codes that are stored in the PCM; to know exactly what fault code is there will need scanned the PCM (Powertrain Control Module). with this code we could send other details or tips to fixed.

Keep us updated.

  • ZJ Limited
    ZJ Limited Aug 21, 2011

    Yes, but it might reset on it's own within 50 miles and 5 starts.


    Keep in mind that there are two oxygen sensors on the system. One is located at the exhaust manifold and the other just after the Cat.
    Click here for the front one and click here for the rear one.

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Hi there
after replacing any sensor on any vehicle that makes the check engine light come on you must take car to whoever has a code scanner (local auto parts store) and have them reset the computer till this happens the ecm still reads the old one hope i have helped you with this issue have a wonderful day

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Related Questions:

0helpful
1answer

How to reset check engine light?

First replace the bank 2 sensor 1 O2 sensor. p0051 is that sensor heater circuit. These codes are always the O2 sensor, unless you see the wires are melted against the exhaust manifold. Once replaced the light will eventually go out. A code reader or scanner will turn it off.
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My check engine light is on. it is pulling 4 codes P0302 P1670 P0174 P0171

code p 0302 is a misfire on no 2 cylinder
check that the plug lead is on properly, that the lead is operational
move the injector from 2 to another cylinder and see if the misfire follows the move
code p 0174 refers to system too lean bank 2===causes intake /exhaust leak---fuel pressure / pump---injector/s--AIR system--hose connection/s
code p 0171 refers to system too lean bank 1=== causes intake /exhaust leak---AIR system---MAF/VAF sensors---fuel pressure / pump---injector/s -- HO2S
You stated that you replaced the O2 sensor but that is different to the HO2S sensor , does a different job and controls the air/fuel mixture from the ECM
because it has banks 1 and 2 it is a v engine and you will have a HO2S in the exhaust manifold or before the cat converter for each exhaust
O2 sensors are after the cat converter and confirm the HO2S settings for the ECM
to put the lights out , use a scan tool to reset the ECM
1helpful
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Engine Service Soon Light On code P0154

Error Code: P0154
Description:
Heated Oxygen Sensor (HO2S) 1 , Bank 2 - No Activity Detected
Problem areas:
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- Heated oxygen sensor (HO2S).
- Engine control module (ECM).
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2001 PONTIAC GP 3800, BANK ONE O2 SENSOR

probably not the o2 sensor but some other problem causing that code does it say bank 1 lean or rich?
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Getting a lean burn error code on banks 1 & 2. reset it and drove 250 miles before it came back on. Reset it again but the code came back within 10 miles. Checked for vacuum leaks, none found, replaced...

Check for vacuum leaks.

Air tube between air filter and intake manifold.

If the motor has over 80,000 miles then the intake manifold gasket can **** in air and leaning out the air/fuel mixture.

Give each air / vacuum relayed hose a 1/8-1/4 turn.

Get a steam cleaning on the motor and check for any sign of leak around the sensors.


0helpful
1answer

Engine light was on and engine idles rough.

these O2 sensors are cat convertor check sensors. id be checking cat convertors and hopefully you should try replacing if not all ready is the front bank 2, O2 sensor
if you have scanner can you see fuel trims in data display to confirm high fuel trim only on bank 2 either +-5 or more indicates problem and if bank 2 sensor 2 has fixed high 700mv reading cat no good(warm idling)
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1996 s10 2.2 engine starts but idles rough and will not rev up.

Hi! You must be frustrated by now! your code is marking that the O2 sensor is bad in bank 1. Did you replace the O2 sensor that is located  before the catalytic converter?  The S10 has an O2 sensor specially made for that cat. its about 30$ That would explain for your blackened spark plugs; your pc on the car is asking for more fuel. GOOD LUCK!!
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2002 Tahoe Dropping Cylinder

A tune up will not cure the lean code, in fact an engine miss gives a rich code from the unburned fuel. I would suggest u verify u have no vacuum leaks, also clean the inside of the MAF sensor if so equipped and replaced the bank two O2 sensor, that is the passenger side sensor before the catalytic converter. If u have the money replace both right and left sensors, it is better to do them in pairs.
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Engine code on a neon

it sounds like you have a fuel issue. you should check for proper fuel pressure. its should be 48 PSI.

if its not, it could be a clogged fuel filter, a malfunctioning fuel pressure regulator, clogged fuel pump strainer, or even a bent, kinked fuel line.

if the fuel pressure is correct, its most likely a faulty fuel injector.

by the way, you car doesn't have a mass airflow sensor, it has a MAP sensor
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