Question about 2006 Chevrolet Silverado 1500 2WD

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My 2006 silverado 2500, 6.0 engine shows a code for bad o2 sensors, put 2 new ones in, check engine light still one, the code never goes away even after it is reset with the engine off. whats up with this ??? thanks Brian

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You have to reset the check engine light. It will erase all the bad codes that you have fixed. To do this, you have to remove the positive battery cable for a minute or so and reconnect. It should clear the check engine light..

Posted on Aug 30, 2010

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Hi I have Toyota solara 2006 and 120000 m on it the check engin goes on and of by itself once a while the problem is in o2 oxygen sensor bank 1 Do u know why ?


Your O2 sensor is part of your engine management system and helps the main computer decide on the correct fuel/air mixture for the current driving conditions. They often go bad way earlier than 120 K miles. The check engine light is the cars way of telling you a number of things are bad. You can easily replace the O2 sensor your self. It is located in the lower part of the exhaust manifold. It looks like a sparkplug with a thin wire on it. Simply disconnect the wire from the engine connection, unscrew the O2 sensor and replace it with a new one (about $85-110) at your local auto parts store. Hope this helps.

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1999 jeep grand cherokee.uses alot of gas idals bad.new fuel filter.blowing black smoke.hit the gas.and it will get away from you...need help...


Can be a bad O2 sensor. Check with a scanner which shows live data the 1-1 and 2-1 (upstream) sensors. Good sensors show a rapidly fluctuating voltage from 0.2 to 0.8 V. When the sensor has a steady voltage, then its most probably bad. There is no check engine light and no fault codes set?

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CODES P0300, P1128


po300 is random miss fire doubtful two O2 sensors bad at one time most likely coolant temp sensor is bad causing engine to run rich this will cause O2 sensors to throw a code(thats what they are there for..exhaust gas temp. and raw fuel) running rich will also fowl spark plugs(=miss fire) P1128 ??

Mar 20, 2013 | 2006 Jeep Liberty

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It sounds like you may have a small block in your fuel system. When was the last time you changed your fuel filter out?

Nov 12, 2011 | 1999 Chevrolet Silverado 2500

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My 2006 Chevy Silverado 1500 5.3 L engine surges +/- 200 rpm between 30-59 mph in final drive gear...in lower gears runs fine. No check engine light or computer code generated until recently which showed...


a bank 1 or a bank 2 generally means an 02 sensors bad. or you may simply have a faulty gas cap. i would try the gas cap 1st,make sure it's tight, the engine running for a few minutes,then cut engine off. then open gas cap,do you hear pressure [air] releasing from the fuel tank? ok if not that,then if bank 2 is really bad,your check engine light would be on. but if the idle control sensor is bad,no light would be on at all. and it[engine] would idle up and down.or would'nt idle at all,or would idle up and down,just like what you've described. good luck and thank you for choosing fixya.com and please let me know if i'ved assisted you!

Feb 20, 2011 | 2006 Chevrolet Silverado 1500 2WD

2 Answers

Code PO420 catalyst system efficiency below threshold


you may have a bad converter, its not cleaning the exhaust, but on the other hand a bad rear o2 sensor can also cause this problem,there is a wat to test but you would need a scan tool or scope,replace the other sensor, if light returns then replace the converter, no money lost, if you were to replace the converter the o2 sensors should also be replaced. you have 165000 miles it would be crazy not to replace sensor and install new cat, so basically your just doing it in 2 steps and may get lucky and not need a cat. good luck.

Mar 05, 2010 | 2001 Nissan Altima

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The check engine light produced codes p1150 and p1155 on a 2000 toyota avalon xls.


All cars sold in the US after 1995 use the same on board diagnotics called OBD-II. The codes are the same. Search OBM-II error codes and you'll get a listing.

P1150 Air/Fuel Sensor Circuit Range/Performance. (cylinder bank 1 Sensor 2)

P1150 may mean that one or more of the following has happened:
water or corrosion in the O2 sensor connector, loose terminals in the connector, wiring burnt on exhaust components, open or short in the wiring due to rubbing on engine components, holes in exhaust allowing unmetered oxygen into exhaust system, unmetered vacuum leak at the engine, bad O2 sensor or bad PCM.

P1155 Air/Fuel Sensor Heater Circuit. (cylinder bank 1 Sensor 2)
P1155 may mean that one or more of the following has happened: O2 Heater element resistance is high, Internal short or open in the heater element or O2 heater circuit wiring high resistance

Solution :Replace oxygen sensor and see if the problem goes away.

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3 Answers

2000 chevy silverado z71 check engine light will not go off.


you have to know what the code is that your truck putting out your truck has 4 O2 sensors. the trucks computer is smart and the code will tell you witch one is bad but if you replace just one the next one on the same exhaust pipe will probley go bad so its safe to replace all four. the draw back to replaceing all of them is thay cost about 80 bucks for one ACDelco O2 sensor. It has to be done before it will pass Emissions. not a hard part to change about a 7/8 open end wrench will take it off. have fun.

Jul 22, 2008 | 2000 Chevrolet Silverado 1500

2 Answers

2000 chevy silverado 2500 with a 6.0 motor


I own a shop, and think this; The light came on, and later (after ignoring it) it started flashing. If its flashing; it means you have a problem that requires attention right away, and should not be driven. You could have a problem that will do severe damage to the engine, and/or other components in the vehicle. If its not knocking, squeaking, or dieing in the road, then this must mean you can still drive it. If your dad is a mechanic, then I would suspect he's going to raise cane at you for ignoring the light. Should you not know something is wrong, and by ignoring the light you could be doing more damage to your car? Check it out before you even attempt to drive it anymore. If it melts down in the road, your dad is going to know. You sound just like my son. He won't check anything until it just dies completely, and then he complains about having to spend more to fix it, than he would have if he had just fixed it to begin with. I'll bet you would fix your computer if it was acting up, so why not your transportation? I don't mean to sound rude, and I'm in no way trying to insult you. I just think you are not doing your poor car any favors, and your dad may go off on you.
Glad to add my 2 cents worth!!!

Jun 26, 2008 | 2000 Chevrolet Silverado

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