Question about 1991 Toyota Celica

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Bad 02 sensor on a 1994 chevy truck Z71 (V8),

If an 02 sensor on a 1994 chevy truck Z71 (V8), how will it affect the way it runs?

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  • ripple222002 Jun 30, 2009

    the check engine light does not come on. It misses bad, then runs good. Sometimes it will die. It seems to run worse when you put it in gear. Then again it will run crappy (like an old carburetor that has trash in it) then run normal



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Check engine light should come on and you will have very bad gas mileage. Easy fix.

Posted on Jun 30, 2009


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01 GMC 1500 v8 z71 ...missing & not shifting on

The transmission has been electronically controlled for several years.
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I have a 1996 silverado with the 5.7l vortec engine. My Service engine soon light came on today so i took my truck to advance. They read a code PO172-System running rich (bank 1) and my exhaust has a...

the code indicates a bank anything that is common between both sides of the motor will not set this code,if anything it would set a different code and show a common code for both sides of the motor,vacuum leak would not be the problem as it would also affect the way the motor runs,bad /dirty maf sensor again affects both sides and a code difference,bad coolant again affects both sides and different code,an 02 sensor can show which side the problem is and could cause the setting code.bad spark plugs can also cause this code, an injector one or more for this side can cause this,bad fuel pressure regulator will affect both sides I would check spark plugs, check the 02 sensor for proper voltage readings on the left side of the motor(driver`s side),it`s uncommon for injectors on one side to only go bad and not injectors on both sides.if the plugs are okay and don`t need changing you may need to check for tune-up items such as plug sounds like the motor is not burning the fuel properly giving the rich running code

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2006 5.3ltr chevy silverado z71 p0455 andp0449

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Need the location of the mapping sensor for a 1994 chevy caprice

Hello l_anderson36: My name is Roger and I will help you. You should find the map sensor at the front of the engine. Located on the drivers side of the engine. The sensor will have a plug with three wires on it.
Should you need further help please just ask. Please rate the quality of this answer. This way we know your answer helped. Thank You for using Fix Ya.Roger

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I have a 2000 chevy silverado Z71. The drl quit

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Start the tuck with the park brake on to see if the light come on when it starts. If they do you have a bad relay if not it is most likely that sensor on the dash.

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Diagram for 1994 chevy z71 k1500 4x4

o2 sensors are located on the header pipe and on the catalyctic conververter on some vehicles. Spray with wd40 or the like before unscrewing it.

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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.

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