Question about 1998 GMC Sonoma

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2001 gmc sonoma 2.2 sfi exhaust is black when you rev engine. only getting 7 miles to the gallon. I replaced both 02 sensors and reemed out thr catylic converter. it gets 11.5 mpg now dosent skip at all but still smokes black when you get after it . code 1336 does not recognize crank sensor variation does anyone have any ideas???.

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6ya6ya
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Posted on Jan 02, 2017

yankstorm02
  • 145 Answers

SOURCE: location of iat high input sensor

The iat (intake air temperature) is located on the air filter housing. If its reading high its probably unplugged

Posted on May 17, 2009

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SOURCE: 2001 GMC Sonoma Ext cab 4.3l, quit while running

Pull plug wire and install a philips screwdriver into the plug wire get it 1/4 inch away from a good ground and crank the engine over, is there spark? if so check that you have fuel pressure buy renting a fuel pressure test kit from schucks or auto zone and turn the Key to run position with the gage hooked up, it should read 50 PSI turn key off and wait 20 seconds should still have 20 PSI of fuel pressure, if no fuel pressure check fuel pump relay, then check fuse to pump. if you have a bad relay and are not getting fuel then check the oil pressure switch to see if you have oil pressure at the switch if no pressure then the oil pressure safety switch has died and needs to be replaced and should stark after replacing. If you have fuel then check the timing to see if you slipped timing belt.

Posted on Jun 12, 2009

  • 70 Answers

SOURCE: CHECK ENGINE LIGHT IS ON, GOT CODES P0157 2 TIMES,

the bank 2 sensor2 is used to check that your catylitic converter is working on that side of the exhaust. without seeing the car and doing sensor tests, it would be a gamble to say replace the sensor. so you can replace it and see what happens or take it to your favorite shop for further diagnosis

Posted on Dec 02, 2009

  • 3 Answers

SOURCE: i hava a 1998 gmc with a 5.7 began skipping have

p1345 if the distribator has been taken out it will bring up this code lift it back up and turn it one tooth in either direction reset the code and check it p1404sounds like egr cheapest place too get one is rockauto.com

Posted on Apr 30, 2010

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SOURCE: My 2003 GMC Sierra Idles Rough And Cut Off

Before replacing the O2 sensors, I would check the fuel pressure. You may also try to have someone pull a trouble code from the powertrain control module to verify why the engine light is on. Do not replace any parts until this is done, otherwise your going to be guessing at the root cause, and it will get expensive with part replacement.

Posted on May 12, 2010

Testimonial: "Trouble code P0101 {Mass Air Flow}and code P0332 Knock Sensor.Thanks i saved a lot money."

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1995 gmc sonoma right bank 2-4-6 sparkplugs are all black its had new plugs and wires


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Where is my 02 sensor on my sonoma? its a 94 with the 4.3 liter vortec motor.


There will be two of them.
One right after the manifold coming off the engine in the exhaust pipe
The second on is halfway down the vehicle in the exhaust under the car after the firewall
Please let me know if this helps

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02 gmc sonoma 4.3 engine starts and runs great for 30 minutes and then stalls like its flooded, if it sets after stalling for 30 minutes and cools able to drive home before starting to stall again. After...


Smell of the oil,to see if the fuel injector(spider)is leaking into the crank case,if so,the intake will have to be removed to repair the problem,oh,and change the oil.

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1 Answer

We have replaced our 02 sensors twice initally it


Having owned and thoroughly enjoyed an 01 Durango SLT plus for 6 years, congrats on having the "D".

How many miles on your D? Aging O2 sensors can cause mileage to drop. Which engine do you have? The 4.7 or the 5.9?

You will pretty much find that 11-13 mpg in town is the norm, and 17 is normal for hwy cruising. Towing though in either case will have quite an effect.

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I replaced my 02 sensor and cleared the code po 155 still comes on on my 2002 sonoma please help


which sensor did you change, the correct one is located on passengerside on exhaust pipe near the top. not after the converter or on the driverside, that truck if it has a 4.3 v-6 engine it has 3 to 4 sensors located 2 before the cat and 1or 2 after the cat, you want the one on passengerside closest to the top near manifold. hope this helps.

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2001 chevy cavalier check engine light came on. went to autozone and they said it was an 02 sensor or the catalytic converter. is this something a novice mechanic can fix or should i leave this to a...


If it was P0420 it is most likely a failing converter.It is better to let a mechanic tackle this unless you are good with a torch to replace the converter.just remember that your cat. converter has a 80,000 mile warrenty with GM so you may be able to get it replaced for free.

Dec 06, 2009 | 2001 Chevrolet Cavalier

1 Answer

Oil pressuse dropson 1995 on sonoma pickup gm truck


how many miles on the truck ? when was last oil change what weight oil do you use ?

hope 2 help shack

Apr 15, 2009 | 1995 GMC Sonoma

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