Question about 1997 Chevrolet Blazer

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Service engine soon light always on. Could it be due to oxygen sensors?

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Yes it could be. Emissions are the number one reason for the light to come on. Stop by your local auto parts store and they will read your codes (for free!) and tell you why the light came on.

Posted on Nov 15, 2009

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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:
- Wiring.
- Open circuit in signal wire, between Heated Oxygen sensor 1, Bank 2 and ECM. (Must check and confirm)
- Heated oxygen sensor (HO2S).
- Engine control module (ECM).

Nov 20, 2013 | 2003 Mitsubishi Montero Sport

1 Answer

Suburban service engine soon


i think the check engine light caused by oxygen sensors,due to little misfire detected , fuel system ,bank 1 and bank 2 lean and rich mixtures..

Sep 25, 2013 | 2002 Chevrolet Suburban

2 Answers

P0138 and p0158


These codes, po 138 bank 1 sensor 2 shorted to voltage and code po158 means bank 2 sensor two shorted to voltage. these are the two rear oxygen sensors in the exhaust system. there two up frt and two in the rear, check the wiring on the two rear sensors, make sure that the wiring is not cut or stuck between metal. if the wiring is good then replace both rear sensors, when you get them ask for the left and right after the cat sensors. or bk1 s2 and bk2s2. after replacing them reset the computer. go to an auto parts sotre or if you have a code reader you can do it. hope this helps good day.

Feb 19, 2012 | 2004 Dodge Stratus

1 Answer

2003 jeep liberty p0138


P0138 CHRYSLER - O2 sensor 1/2 Circuit high
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust Possible causes - Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty Rear Heated Oxygen Sensor Bank 1
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks

Jan 27, 2012 | 2003 Jeep Liberty

1 Answer

Service engine soon light comes on and gas guage does not work


IT SOUNDS LIKE YOU HAVE 2 UNRELATED PROBLEMS. THE CHECK ENGINE LIGHT 9 OT OF 10 TIMES IS DUE TO AN O2 SENSOR, ITS PART OF YOUR SMOG EQUIPMENT. IF YOU DRIVE RELATIVELY SHORT DISTANCES ALL THE TIME THE OXYGEN SENSORS WILL GET PLUGGED CAUSING THE LIGHT TO COME ON, REPLACING THE OXYGEN SENSORS ISNT A BIG DEAL. NOW FOR THE GAS GUAGE NOT WORKING, IT COULD BE A FEW THINGS, FIRST CHECK YOUR FUSES, IF THEY ARE OK, IT COULD BE A RELAY, A BAD GUAGE OR JUST A LOOSE WIRE TO THE GUAGE,OR THE SENDING UNIT FROM THE TANK TO THE GUAGE. BUT MOST LIKELY ITS PROBABLY A SENSOR THAT HAS GONE BAD.

Dec 31, 2011 | 2006 Nissan Pathfinder

1 Answer

Service engine light is on


The service engine soon light could be due to oxygen sensor(s) being bad or EGR module...

Nov 27, 2011 | 2003 Ford Expedition

1 Answer

Service engine soon light comes on and off


oxygen sensors are not serviced by mileage on newer models. When the sensor starts to fail, the "check engine" light will go on. Pulling codes will indicate problem areas. On a good running engine, you may never have to replace the O2 sensor,

Mar 05, 2010 | 1999 Oldsmobile Alero

2 Answers

2003 Buick Regal Service Engine Soon light.


The error that I'm showing for error code P1133 is 
P1133 Heated Oxygen Sensor (HO2S) insufficient switching bank 1 sensor 1(Rear Bank).  I would suggest having both of your Oxygen Sensors replaced if you haven't already had that done.  Hope this helps.  Thanks for an honest rating and for using FixYa.

May 19, 2009 | 2003 Buick Regal

1 Answer

SERVICE ENGINE SOON LIGHT ON


you need to change the oxygen sensor. it will soon cause you problems. after you need to take it in to  erase the code.

Apr 20, 2009 | 1997 Chrysler Town & Country

1 Answer

Service engine soon & brake light stays on


the service engine light is prob due to the oxygen sensor being damaged, not replace or you having the catalytic converter taken off---just messing with you. start at auto zone and have then do a free code read then go from there. you should troubleshoot the low fluid level switch for your brake fluid. unplug it and see if the light goes off and if it doesn't jump the two terminals on the harness. oh the car will have to be running. Let me know MrRodneyLong@gmail.com

Jul 04, 2008 | 2000 Ford Mustang

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