Question about 1995 Ford F150 Styleside Regular Cab

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Problems that defective oxygen sensor can cause

Engine hesitates and surges when cold

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

fastboyz
  • 674 Answers

SOURCE: oxygen sensor

no it wont cause it surg or jump
you might be able to fix it yourself but you need to get the codes

Posted on Nov 14, 2008

wyatt1582
  • 453 Answers

SOURCE: 2002 taurus SEL-5 engine codes to go with light and problems

Cylinders 2, 3 have coil packs change out located on back of motor. you will have to take the upper intake off to get to them. Very easy to do. #2 center plug on back of motor #3 is on drivers side of motor. Crank sensor you will have to remove tire on car passenager side next look at crank pulley on left side of block you will se two wires the heat cover running to it.
Change these first it might correct the O2 sensor problem.

Posted on Jun 16, 2009

  • 3640 Answers

SOURCE: rough idle hesitating at idle drives fine i

check plugs, wires, and coils for proper spark.

Posted on Oct 29, 2009

  • 15 Answers

SOURCE: 2001 ford e-250 4.2 engine engine idle surges

Listen before you spend the money try a simple thing first. At our shop we start with the EGR solenoid, locate it, remove it, make sure that the ports are clear. Carbon build can cause your symptoms

Posted on Dec 15, 2009

leedavidian
  • 1420 Answers

SOURCE: Does a 1996 Ford Taurus 3.0 have a hot wire type

TheMobilian, Yes, the Mass Air Flow is a Hot Wire type. There is a spray made for the mass called mas air flow cleaner. Regular cab cleaner is too harsh and can eat the coating inside mass air flow and it's delicate parts. Use throttle bore foam cleaner; it works like bathroom scrubbing bubbles and eats the gum and varnish. When engine warms up (closed Loop) both sensors work together giving input to ecm for output. Have someone with a live data reader read both sensors. (Let me know the readings?)


Image Mass Air Flow(MAF)Sensor

PURPOSE

The Mas s Air flow (MAT) sensor measure s the amount of air flowing into the engine.

This value is used by the Powertrain Control Module (PCM) in calculating the required

Fuel injector pulse within order to provide the desired air fuel ratio. This input can also

be used in determining Electronic Pressure Control (EPC). Shift and torque converter

clutch scheduling.

CONSTRUCTION

The MAE sensor is located directly in the airflow path between the air cleaner housing

and the throttle body. Ail air entering the intake manifold must pass through the sensor.

Located in the MAT sensor directly in the airstream are two platinum wires, a hot wire

heated by electrical current and a cold reference wire. The MAF sensor uses the air flow

across these wires to calculate its output.

OPERATION

The hot wire is maintained at 200CC (392CF) above ambient temperature as measured by

a constant cold *e. The current required to maintain the temperature of the hot wire is

proportional to the air mass flow. The MAE sensor then measures the amount of

electrical current required to maintain this temperature difference and converts this

value to an analog DC voltage. This output varies directly with the mass air flow rate.



Pay attention to the Paragraph about the torq converter.


Posted on Dec 20, 2010

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1 Answer

Oxygen sensor problem on mitsubishi outlander 2004


If the car has a check engine light on you may want to have the code checked, as this may point you in a direction as to what is causing this issue.

It could also be a bad EGR valve if the vehicle surges.

Hope this helps you out,
1aauto.com

Jul 10, 2012 | 2004 Mitsubishi Outlander

Tip

Oxygen (Lambda) sensor


<p><b><span>1.12)<span> </span><span> </span><u>Oxygen (Lambda) sensor</u></span></b><br /> <p><span> </span><br /> <p><b><span>What is it?</span></b><span><span> </span>This is an electrical device that measures electronically the amount of oxygen in the exhaust.</span><br /> <p><span> </span><br /> <p><b><span>Where is it located?</span></b><span> The device looks, externally, a bit like a spark plug set into the exhaust manifold.<span> </span>It is screwed into the manifold and is identified by a thick wrap cable connected to its top.</span><br /> <p><span> </span><br /> <p><b><span>How does it work?</span></b><span> There are generally two types of oxygen sensor.<span> </span>The first has only one wire to it. This is the voltage output wire, the metal body of the sensor provides the 'ground' in the circuit.<span> </span>The second type of sensor has four wires within the thick cable.<span> </span>Two of these wires generally of the same colour (most often white) are part of electrical heater circuit built into the body of the oxygen sensor (it only works when very hot).<span> </span>The other two wires (often grey and black) are connected to the oxygen sensing element and these send a cycling voltage output (0.1 to 0.9 volts) inversely proportionate to the oxygen levels detected, back to the ECU.<span> </span>If the engine is running very lean the oxygen levels in the exhaust are high and the sensor has low voltage; conversely if the engine runs rich the oxygen levels are low and the voltage output of the sensor is high. </span><br /> <p><span>On some systems there are two oxygen sensors, one on the exhaust manifold before the catalytic convertor, monitoring engine operation and one after the catalyst that measures the catalyst performance.<span> </span>With twin separate exhausts as with V6 and V8 engines it is possible to have four oxygen sensors.<span> </span></span><br /> <p><span> </span><br /> <p><b><u><span>Symptoms of faulty oxygen sensor</span></u></b><br /> <p><b><span>Associated OBD2 error codes DTCs: <span> </span>P0130 - P0167</span></b><br /> <p><span> </span><br /> <p><span>Although perhaps seen as the last element in the chain of engine feedback sensors the significance of a faulty oxygen sensor should not be overlooked as it exerts a very strong influence on the ECU:-</span><br /> <p><span><span> </span></span><br /> <p><span><span>&middot;<span> </span></span></span><b><span>Fast/erratic idle, poor fuel economy</span></b><span> - if the oxygen sensor, in error, reports to the ECU that the engine is running lean (oxygen levels are high) the ECU may respond by enriching the fuel mix.<span> </span>This causes the engine to have a lumpy idle at a higher than normal rate and also increases fuel consumption.<span> </span>(see additional note below)</span><br /> <p><span><span>&middot;<span> </span></span></span><b><span>Hesitation and surging</span></b><span> - signals from the oxygen sensor continue throughout the engine performance range so fault issues that manifest themselves at idle will occur at all engine speeds with performance consequences.</span><br /> <p><span><span>&middot;<span> </span></span></span><b><span>Misfire and stalling</span></b><span> - if the oxygen sensor reports that the exhaust oxygen levels are too low (i.e. engine running rich) the fuel mix might be reduced, through reduced injection times, to the point at which the engine misfires or stalls from being made too lean.</span><br /> <p><span><br /></span><br /> <p><span><b>NEXT 1.12b) How to check and fix oxygen sensors </b></span><br /> <p><span> </span><br /> <p><span> </span><br /> <p><b><br /></b><br />

on Jul 22, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

On my 2002 yukon 1500 I have trouble codes of 171,174, 420 what is my problem


Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.
Note: This DTC is very similar to P0171, 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.
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.
I hope this helps.

Mar 31, 2012 | GMC Yukon XL Cars & Trucks

1 Answer

I have a 96 Old Ciera, feels like it's bucking/surging. More like hesitation while idling or driving. Has stalled a few times at stop signs, etc. Mechanic hooked up to computer, says bad egr and oxygen...


Had a similar problem that also caused the power brakes not to function. I believe there was a problem in the vacum fittings that was causing it to lose power but I am clearly not an expert.

Jan 07, 2011 | 1996 Oldsmobile Cutlass Ciera

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

2 Answers

Need a pic or diagram of location of Bank 2 sensor location on a 2004 Acura TL 3.2


Oxygen Sensor-I don't have a location of the Bank 2 sensor, so you'll have to guess on it by determining how many sensors you have by inspecting the exhaust system from the exhaust manifold down to the catalytic converter and past the catalytic converter which is downstream. Anything before the catalytic converter is upstream.
Do you have a code that describes which O2 sensor is not responding correctly?

Test/Replace
  • The sensor is threaded into the exhaust manifold.
  • It can be difficult to remove unless a special anti-seize compound is coated onto its threads.
  • Torque the sensor to 30 foot-pounds using a special socket.
  • A sensor that is too loose or a cracked exhaust manifold can result in a lean signal to the computer.
  • Check the vents in the thimble of a replacement O2 sensor.
  • There should be the same number of holes and they should face clockwise or counterclockwise like the ones on the original sensor.
  • Installing the wrong sensor can result in slower cross counts.

---
Operation
Although the oxygen sensor is termed a sensor, in actuality it is a galvanic battery. The oxygen sensor compares the potential difference between the ambient oxygen content around the exhaust and the oxygen content present in the exhaust stream. When the exhaust sample is lean, there is more oxygen in the exhaust as compared to the atmosphere. When the exhaust sample is rich, there is less oxygen content in the exhaust as compared to the atmosphere. The greater the difference between ambient oxygen and exhaust oxygen content, the greater the voltage produced.
For the oxygen sensor(s) to operate properly, it has to reach an operating temperature of approximately 600°F before a consistent voltage potential can be generated.
The Engine Management System (EMS) determines the state of readiness of the oxygen sensors by supplying a bias voltage of approximately 400 - 500mVDC to the oxygen sensor. As the sensor begins to warm up, the voltage produced increases due to rich exhaust mixtures commanded by the EMS. When the EMS senses a return voltage greater than the bias voltage, the computer will command the fuel mixture lean. When the output voltage from the sensor drops below bias voltage levels, the computer will command a rich mixture again. When the EMS determines that the O2 sensor has responded properly and within a predetermined amount of time, it will begin using the sensor as an input to adjust fuel trim.
Many Oxygen sensors used in OBD 2 engine management systems incorporate heaters. These heaters raise the sensors up to operating temperature quickly. The sooner the oxygen sensor gets to operating temperature, the sooner the EMS can maintain closer control over emissions, economy and performance. The oxygen sensor provides the computer with necessary information to maintain favorable operating conditions for the catalytic converter. The role of the catalytic converter is to store oxygen for the reduction of HC, CO and NOx emissions. The oxygen sensor input is used by the EMS to protect the catalytic converter by cycling the air/fuel mixture rich and lean. This provides adequate oxygen for storage while maintaining cool enough operating temperatures to prevent catalyst damage.
In addition to controlling the converters operating conditions for emissions control, the computer uses the oxygen sensors to tailor fuel trim providing a balance between fuel economy and performance.
Abnormal sensor activity has a profound effect on pulse-width and fuel trim strategies. Sensor values that indicate lean conditions will cause the computer to command changes in short term fuel strategies. Conditions such as secondary misfires create excessive HC levels. This also produces high oxygen levels in the exhaust. The oxygen sensor will sense only the increased oxygen content and input to the computer will be below bias voltage levels. The computer will respond by commanding additional fuel.
OBD 2 vehicles use oxygen sensors downstream of the converter(s) to monitor the efficiency of the catalyst. When the catalyst performs properly, available oxygen is used resulting in low levels oxygen in the exhaust sample. While downstream oxygen sensors are constructed the same as upstream oxygen sensors, the values that they generate are different. With relatively richer mixtures present around the downstream oxygen sensor, voltage inputs to the computer will be above the 450mV bias voltage. If the catalyst is operating effectively, the downstream oxygen sensor will cycle when the catalyst is flooded with oxygen. Typical values from the downstream oxygen sensor(s) are between 550- 900mV at idle.
While the downstream oxygen sensor is used to monitor catalyst efficiency, the upstream sensor has a pronounced effect on performance. Lean oxygen sensor values will result in an increase in pulse-width, excessive emissions, surging, hesitation, and potentially catalyst damage. Additional fuel can cause the catalyst temperatures to rise due to an afterburner effect in the converter. The oxygen sensor is the only post combustion input to the EMS. Other malfunctioning systems affect its operation.
Improper rich indications will cause lean operating conditions that may result in loss of power, hesitation, surging, poor idle quality and possibly converter damage. Sensors that do not switch properly, or are lazy do not provide accurate information to allow the computer to properly maintain the air/fuel mixture. Faulty heaters do not allow the sensors to reach operating temperature fast enough and the vehicle may remain in open loop for longer periods of time. Malfunctioning heaters also allow the sensors to cool down during periods of extended idle.
A faulty oxygen sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit can cause the following symptoms.
Related Symptoms
  • Surging at idle
  • Unstable idle
  • Running rough off idle
  • Hesitation
  • Stumble
  • Chuggle
  • Poor fuel economy
  • Spark knock
  • Stalling on acceleration
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Oct 15, 2010 | 2004 Acura TL

1 Answer

Im trying to pass smog and the codes that they gave me are p0171 p0174 p 0420 p0430..please help cant get a straight answer from anyone and my reg sticker is old .im dyin please help


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


P0174 - System Too Lean (Bank 2)
Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.

Note: This DTC is very similar to P0171, 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 P0174 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 can 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


P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

Symptoms: You will likely not notice any drivability problems, although there may be symptoms.

Causes: A code P0420 may mean that one or more of the following has happened:
* Leaded fuel was used where unleaded was called for
* An oxygen sensor is not reading (functioning) properly
* The engine coolant temperature sensor is not working properly
* Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
* Retarded spark timing
* The oxygen sensors in front and behind the converter are reporting too similar of readings

Possible Solutions: Some suggested steps for troubleshooting a P0420 error code include:
* Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
* Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
* Inspect the downstream heated oxygen sensor (HO2), replace if necessary
* Replace the catalytic converter

One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.


P0430 - Catalyst System Efficiency Below Threshold (Bank 2)
Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

Symptoms: You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold.

Causes: A code P0430 may mean that one or more of the following has happened:
* The catalytic converter is no longer functioning properly
* An oxygen sensor is not reading (functioning) properly
* There is an exhaust leak

Possible Solutions:
* First, inspect for exhaust leaks.
* Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.

One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.


Hope helps.

Aug 02, 2010 | Ford Taurus Cars & Trucks

2 Answers

Buick regal 92 3.8L Horrible fuel mileage


Sounds like you might have an oxygen sensor problem. Your catalytic converter(s) maybe defective or dirty. That in turn can dirty up the oxygen sensor. A defective oxygen sensor will send faulty info to the computer, interpreting the fumes as cold (even when the engine warms up). That causes the computer to adjust the fuel mixture to very rich, giving you poor gas mileage and the fuel smell. Hope it helps.

Mar 16, 2010 | 1992 Buick Regal

3 Answers

1996 Astro AWD 4.3L V6 308,000Km engine hesitation/surging


tsb remove dist cap ,clean out breather holes i replaced cap and rotor at the same time. chevy has the problem with the 4.3l astro,s and blazer i have both.fixed the problem when buying the cap and rotor the directions inside will also tell you how to fix

Nov 23, 2009 | 1997 Chevrolet Astro

1 Answer

Problem bad hesitation when cold


You should change all 4 O2 sensors, it will run better :)

Also check your compression. Not enough compression on any one cylinder will cause oil blow-by and cause it to fail emissions. Also, the EGR valve can cause the same symptoms.

Sep 13, 2009 | 1997 Chevrolet K1500

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