Question about 2001 GMC Jimmy

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O2 sensors 2001 4.3 gmc how many ?

HOW MANY SENSORS ARE ON A 2001 4.3 JIMMY EXHAUST SYSTEM?

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  • GMC Master
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3

There will be one in each exhaust manifold or in the exhaust pipes right after the manifolds. these are referred to as the upstream sensors or "sensor 1". there is one after the catalytic converter. This is referred to as the downstream or "sensor 2"

Posted on Feb 22, 2012

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Posted on Jan 02, 2017

picatudo
  • 239 Answers

SOURCE: 2001 gmc jimmy defroster-heater blower will not direct heat

you have a vacuum leak

Posted on Jan 07, 2009

SOURCE: 2001 gmc jimmy engine warm but heater blows cold air

Disconnect the heater hoses from the water pump and the intake manifold. Get a compressor and blow out the hose (put the air hose into the the hose that came off the mainfold. then flush the system and replace the antifreeze.

Posted on Dec 12, 2008

  • 315 Answers

SOURCE: I need a link or a better explanation on the code

What does that mean? The P0410 code refers to the emissions system. The AIR pump puts air to the exhaust to lower emissions. It takes in outside air and pumps it through two one-way check valves into each bank of the exhaust.
About 90% of the time that this code is set, the one-way check valves have worn out or failed and allow water (which occurs naturally in the exhaust) back into the pump. In any cold climate, especially in climates with higher humidity, this water may be more excessive. The water partially fills the AIR pump, it can then freeze. When the PCM commands the pump on, if the pump is frozen it cannot turn, thus overloading the circuit and "popping" the fuse.
copyscape.gif Symptoms Possibly symptoms include:

  • MIL illumination obviously
  • Hesitation on acceleration
  • Noise from a bad/stuck AIR pump
Causes A code P0410 may mean that one or more of the following has happened:
  • Water may have collected in the AIR pump or the vent solenoid and frozen or corroded the pump
  • Blown AIR pump fuse due to freezing up
Possible Solutions Note: There is a technical service bulletin (TSB) regarding this code for a number of GM models. The TSB calls for the replacement of the AIR pump and the installation of a new secondary injection hose. The TSB can be found on this ACDelco site.
Additionally, if you simply replace the AIR pump the problem may return again (and again). If you replace the pump, also clean out the hoses and replace the one-way check valve. If this is on a GM model that the TSB applies to, follow those instructions in the link above. In a few cases, people have put a small hole in the rubber cover on the pump which allows any water to drain out.
Also, please note that this may be covered under the emissions warranty on the vehicle. If your vehicle is out of bumper-to-bumper warranty, check if the emissions warranty is still valid!
  • Replace the AIR pump AND one-way check valve
  • Test and clean the AIR pump AND test and replace the one-way air check valve
  • Replace the AIR pump inlet hose
  • Replace the AIR pump fuse (found under the hood)

Posted on Mar 06, 2009

Molson02536
  • 3854 Answers

SOURCE: where is my 1 2 shift sensor 2000 gmc jimmy

Your transmission is electronic, it read's the the speed sensor from the yoke and relay's the information to the ECM which tell's the servos in the transmission acivate to change the gears up or down with the engine out put.

Posted on Apr 05, 2009

daves944
  • 1050 Answers

SOURCE: Emissions sensor fuel tank 2001 gmc jimmy

I don't think you have anything wrong, I just don't think you have completed the correct drive cycle yet. Some vehicles must be driven in a very specific way before all the monitors will set. Here is the drive cycle that Gm Recommends:

  1. Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 122°F (50°C) and within 11°F (6°C) of the ambient air temperature at startup.
    Do not leave the key in prior to the cold start or the heated oxygen sensor diagnostic may not run.
  2. Idle. The engine must be run for two and a half minutes with the air conditioner on and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire, and - if closed loop is achieved- Fuel Trim.
  3. Accelerate. Turn off the air conditioner and all the other loads and apply half throttle until 55mph (88km/hr) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.
  4. Hold Steady Speed. Hold a steady speed of 55mph (88km/hr) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
  5. Decelerate. Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 20 mph (32km/hr). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.
  6. Accelerate. Accelerate at 3/4 throttle until 55-60mph (88-96 km/hr). This will perform the same diagnostics as in step 3.
  7. Hold Steady Speed. Hold a steady speed of 55mph (88km/hr) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.
  8. Decelerate. This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.

Posted on May 18, 2009

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Oxygen sensors shoult be replaced about 65 thousand to 85 thousand miles.

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O2 sensor


not exactly sure, but i have an 89 chev pickup and a 94 gmc and they are both on the exhaust manifold or even on the exhaust pipe near the manifold. hope this helps

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I would like to know where the oxygen sensor is on my 2000 GMC Jimmy. Can anyone help me locate that?


From my research, there are multiple O2 sensors on the exhaust system. They can be found near the catalytic converter, before and after it. O2 sensors are easy to find by the wires sticking out of the exhaust system and the mounting bungs for them.

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I have a 2001 Jimmy 4x4 has no ppower at all tried replacing the computer brain cause about 6 weeks ago it did the same thing and just had to disconnect everything and wait for 15 mins. and then reconnect...


check for pressure at exhaust (possible catalytic converter plugged) is check engine light on? possible o2 sensor. check spark plug gap. check air cleaner. check fuel pressure,

Jun 21, 2011 | 2001 GMC Jimmy

1 Answer

2001 gmc jimmy po171 lean bank code what could be the fix is it a possable o2 sensor


More than likely bank 1 sensor has a possible vacuum leak, or a lean misfire on that side of the bank.(lean misfire happens when gap of spark plug are exceed due to wear), As for the 02 sensor I agree that it is reporting the true engine condition on that side of the bank

May 01, 2011 | 2001 GMC Jimmy

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How many o2 sencor does a 1995 gmc jimmy have


Look at the underside. If you only have 1 catalytic converter then at most you have 2 sensors. 1 before, usually seen when you look at the exhaust manifold near the engine and 1 after the Catalytic converter or on it. If you see a sensor on the exhaust system with wires attached that is an O2 Sensor.

Feb 18, 2011 | 1995 GMC Jimmy

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Wher is the main high voltage o2 sensor located?


The sensor is the one that is ahead of the catalytic converter,in the exhaust pipe that leaves the exhaust manifold,right side of the engine,first pipe you come to.

Sep 01, 2010 | 1998 GMC Jimmy

1 Answer

I have a 1994 gmc jimmy and the check engine light has just come on.the engine surges when im idling but its fine when driving at normal speeds what should i look at??


I would be looking for a leak in the exhaust system, ahead of the O2 sensor. It doesn't have to be a very big leak, you probably don't hear it or maybe a little. It will let air in and screw up the readings in the computer thus the surging. Hope this helps.

Jun 01, 2010 | 1994 GMC Jimmy

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