Question about 1999 Toyota 4Runner

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99 3.4 toyota 4 runner no power knock sensor code left bank lean

Vehicle hesitates off the line and is pinging doesnt have the power it once had. this started happening worse after i was having problems with an aftermarket alarm system. i cut the wires out 1 by 1 only disconnecting the alarm only.it was having power problem before this but not this bad.i am not a novice mechanic. but this one has me stumped

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Sounds like a timing/ignition or fuel injection issue

Posted on Feb 16, 2009

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3 Answers

When maintaining speed of about 50mph,2004 pacifica hesitates and will cut off while in park sometimes.check engine light is not on


ENGINE HESITATES WHILE ACCELERATION

LOSS OF ACCELERATION


It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

-----------

Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

---------

Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

--------

How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

-------------

How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?

http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

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Wheel hop under hard acceleration?

http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

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http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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Nissan Pathfinder stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

-------------

These details will help.

Thanks.

Nov 28, 2012 | Chrysler Pacifica Cars & Trucks

1 Answer

Pinging sound only when acclerating. Doesn't do it when at idle or coasting.


if you have the recommended octane fuel in the vehicle the normal reason for pinging ls the timing is advanced too much.mark the distributor to housing position{so you can return it to how it was if the experiment doesnt solve it}then loosen the distributor retaining bolt and turn the dizzy about 4mm clockwise or anti clock{depends on model}lightly tighten bolt and road test.if pinging is worse turn the dizzy the other way.if pinging decreases just keep adjusting till it just dissappears.hope this helps.if it doesnt return the dizzy to original position and look for another problem.you wont hurt anything trying.

Jan 26, 2012 | Cars & Trucks

1 Answer

Have error code po 171 system to lean.what is the cause and cure


P0171 - System Too Lean (Bank 1)
This means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.

A code P0171 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
* There could be a vacuum leak downstream of the MAF sensor.

Hope this helps. Your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day

Oct 30, 2011 | 1995 Ford Crown Victoria

1 Answer

What is the dianosis of a 2004 Expedition/ with the (dtc) PO171.


P0171 - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

Symptoms: You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.

A code P0171 may mean that one or more of the following has happened:
The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
There could be a vacuum leak downstream of the MAF sensor.


Hope this helps.

Oct 03, 2011 | 2004 Ford Expedition

2 Answers

Running lean on bank 1 and bank 2 codes 171 174 runs great when codes are off once they come on loss of power not much but you can feel it


P0171 - System Too Lean (Bank 1)

Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

Symptoms: You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.


Causes: A code P0171 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
* There could be a vacuum leak downstream of the MAF sensor.


Possible solutions include:
* In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
* Inspect all vacuum and PCV hoses, replace if necessary
* Check for a dirty fuel filter and proper fuel pressure


Hope helps.

Mar 24, 2011 | 2000 Chevrolet Silverado 1500

1 Answer

1996 4 runner had p0171 repair o2 sensor and exhaust leak rd test mil light came on p0325,p0330.knock sensor codes circuit codes banks 1,and 2.replace knock sensor harness under manifold sensor visual look...


what is the resistance of the wires between sensor and ecm connector, excess resistance from varying gauge wire and solder or solder-less connections can cause problems

Mar 10, 2011 | 1994 Toyota 4Runner

1 Answer

What is PO 330 Knock 2 # 2 code is in my 99 lexus rx300 truck


P0330 = "knock sensor no.2 circuit malfunction (bank 2)." This sensor is on the bank of cylinders which contain cylinder No.2. Either the sensor is bad or the wiring to the sensor is bad. The knock sensor detects when pre-ignition (pinging or knocking) is occurring and tells the computer. The computer then retards the ignition timing to prevent engine damage.

Feb 09, 2011 | Lexus RX 300 Cars & Trucks

1 Answer

I have a 2005 Deville and it recently started to shift between gears with some hesitation. Seemed worse when it is cold. I took it to Amacco transmissions and they are telling me that I need the entire...


Yes I think you are. Try Firestone or Midas. Firestone changes out ALL of the fluid and not just 25%. 167K miles may be a lot to some people but it is not to a car taken good care of. Remember Cadillac is top of the line for USA vehicles and has higher tolerances.

Jan 03, 2011 | 2005 Cadillac Deville

1 Answer

Engine knocking doesnt need oil


The engines in the Dodges tend to run on the hot side whitch causes sludge to build up in the engine. They also have very small oil passages which sometimes get clogged with sludge. When this happens the rod bearings starve for oil and begin to fail. The knocking starts out light, only detectable at high rpm;s. It gradually gets worse until it reaches a point where you hear it all the time. On some dodges you only hear the knocking after the engine has warmed up. Some say to use oil additives or engine flushes to try and stop the knock. There is no remedy. Once is starts, it will only get worse.If the engine fails and you take it in for warranty, the dealership will find sludge in the motor and say the warranty is no good because you did not maintain the engine and change oil at regular intervals. Dodge is fully aware of the sludge problem and subsequent engine failures in their vehicles. They choose not to address the problem, instead blaming it on the vehicle owners. Good luck. Maybe you will be one the lucky ones that deals with a honest dealership.

Dec 21, 2010 | 2006 Dodge Magnum

1 Answer

What is engine code P0171 for 2005 Toyota corolla?


What does that mean? Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.
Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.
Symptoms You will more than likely not notice any drivability problems, although there may be symptoms such as a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration.
Causes A code P0171 may mean that one or more of the following has happened:
  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
  • There could be a vacuum leak downstream of the MAF sensor.

Dec 08, 2010 | 2005 Toyota Corolla

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