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Removal of sensor on exhaust manifold

Have problems with my xtrail after cleaning the MAF on the intake,disconected the leads,and shouldn't have.You suggested checking the sensor on the exhaust manifold to see if its carboned up,the problem is their's no room for a normal spanner,and the sensor has a lead with a socket on the end ,so can't use a tube spanner,is their a special tool for this job,also the socket on the lead, is attached to a bracket and dont know how to get it off. hope you can help thank's yours woody

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  • Nissan Master
  • 42,042 Answers

Oxygen sensors have special removal tool . purchase from an auto tool shop or auto specialist shop. They come individually or in packs of 6 as there are many variations of sensors.

Posted on Apr 28, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 60 Answers

SOURCE: S70 GLT head replacement

the easiest way to remove the head is to completely remove the exhaust manifold from the engine and turbo assy. you CAN just unbolt it from the engine , but it takes a good bit of wiggling to get it off if you are leaving thre manifold in the car

Posted on Dec 03, 2008

emissionwiz
  • 75797 Answers

SOURCE: O2 check engine light

U may indeed have a faulty MAF or O2 sensor, the way to tell if the MAF or a vacuum leak is at issue is that both O2's will code lean, if only one codes lean then it is most likely just a faulty O2 sensor, I don't have your codes but this is the way we do things at the dealer for problems like yours. Remember the O2's are before the Cat's., after the Cat's they are called Cat efficiency monitors in the book.

Posted on Jan 03, 2009

  • 95 Answers

SOURCE: Temperature sensor 2000 Mecury Grand Marquis

Make sure that is the sensor. That should be your oil pressure sensor. Follow the top radiator hose to the thermostat look closest to that for the wire going to the sensor. This should be the temp sensor. Good luck

Posted on Mar 20, 2009

c17hydro
  • 2984 Answers

SOURCE: Intake manifold gasket

prev.gif next.gif Intake Manifold REMOVAL & INSTALLATION 1.9L SOHC Engine

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Properly relieve the fuel system pressure.
  3. Drain the coolant system.
  4. Remove or disconnect the following:
    • Negative battery cable
    • Air cleaner fresh air hose
    • Positive Crankcase Ventilation (PCV) valve hose
    • Fuel line from the rail
    • Throttle cable from the throttle body
    • Throttle cable bracket nuts
    • Fuel injector electrical connectors
    • Throttle Position (TP) sensor electrical connectors
    • Idle Air Control (IAC) valve electrical connectors
    • Manifold Absolute Pressure (MAP) sensor electrical connectors
    • Exhaust Gas Recirculation (EGR) valve electrical connectors
    • Heater hose from the intake manifold outlet
  5. Position the wiring harness over the brake master cylinder
  6. Remove or disconnect the following:
    • Intake manifold support bracket bolt
    • Label the vacuum line for proper assembly
    • Drive belt
    • Power steering pump
    • Upper intake manifold bolts
    • Evaporative Emissions (EVAP) canister purge valve solenoid vacuum hose
    • Brake booster vacuum hose
    • Lower intake manifold bolts
    • Intake manifold
    To install:
  7. Thoroughly clean all gasket mating surfaces. Be careful not to damage or score the aluminum surface. If replaced, use Loctite® 290, to seal the new PCV valve inlet tube into the manifold. NOTE: Refer to Section 1 of this manual for the intake manifold torque sequence illustration. The illustration is located after the Torque Specification Chart.
  8. Install or connect the following:
    • New gasket and manifold. Torque the nuts in sequence to 22 ft. lbs. (30 Nm).
    • Power steering pump. Torque the fasteners to 27 ft. lbs. (38 Nm).
    • Drive belt.
    • Heater hose and install the manifold support bracket bolt. Tighten the bolt to 22 ft. lbs. (30 Nm).
    • Lubricate the male ends of the fuel lines with a few drops of clean engine oil, then connect the fuel supply and return lines.
    • Fuel line(s) in the retaining bracket. Torque the mounting screw to 36 inch lbs. (4 Nm).
    • Throttle cable to the throttle body and attach the accelerator cable bracket. Torque the bolts to 22 ft. lbs. (30 Nm).
    • Reposition the wiring harness and connect the wiring and vacuum hoses to their original locations. The harness leads to the TP sensor and EGR solenoid must be routed between the intake manifold runners.
    • Negative battery cable
  9. Fill the coolant system.
  10. Prime the fuel system by cycling the ignition ON for 5 seconds and OFF for 10 seconds a few times without cranking the engine.
  11. Start the engine, check for leaks, and repair if necessary.

Posted on Mar 27, 2009

wyatt1582
  • 453 Answers

SOURCE: coolant in # 1 cylnder\clean intake port of intake manifold

Check the lower intake gasket again the new gaskets that are being use made out of plastic with rubber port seals sometimes don't seal right I still used gasket sealer with the new plastic gasket even if it has rubber seals. MY 4.2 v6 had that problem but I went ahead and replaced the head gaskets also just to cover all the bases. And my F-150 has 210,000 miles on it. Make sure you tight the bolts I know it probably calls for something like 8 ft lbs which to me is not tight enough. Double it.

Posted on Apr 18, 2009

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1 Answer

What is code p0101/p0300/p0171


code p0101 refers to MAF sensor and VAF sensor--range /performance problems===causes --intake leakage/blockage ---MAF/VAF sensor failure.

code p0300 refers to random misfires multiple cylinders ---causes --spark plugs /HT leads --injector /s-- ignition coil/ s--low compression ---wiring

check fuel pressure in manifold and HT leads

code p0171 refers to system too lean bank 1 ===causes --intake /exhaust air leak---AIR system---MAF/VAF sensors ---fuel pressure /pump---injectors ---HO2S sensor

Basically there are two codes referring to the MAF/VAF sensors so check them out and two codes referring to fuel pressure and pump so have a pressure test done on the fuel manifold to determine if pump or pressure regulator.

Aug 24, 2014 | Cars & Trucks

1 Answer

2000 mazda b2500 2.5l flutters &stalls after reving engine has tdc p1401 what is the problem


The dfpe is essentially a flow meter that measures the flow of exhaust gasses returning to the intake manifold when the pcm opens the egr valve. This code is telling you it is not getting data from sensor. Could be the sensor has failed, has been disconnected, or the wiring/connector is bad. Since the engine is stalling, it may be that the egr valve is stuck open or the pipe between the exhaust manifold and the intake manifold has come loose. Inspect the egr pipe, valve, and sensor connections.
The figure below is for the 3 l engine. I could not find the 2.5. See the two ports near the top of the tube? Those will vave vacuum lines attached that lead to the dfpe sensor.

0996b43f8021b8c0-lxsvs4ftyjtcqsaualeaxmu4-5-0.gif

Sep 02, 2017 | Cars & Trucks

1 Answer

2003 jaguar s type r 4.2ltr. check engine light still on after replacing o2 sensors for code po172.can anyone help?


Don't think the sensors were the problem

You never change the rear monitors anyway

You use the code & reference material, to diagnose
what the code tells you,doubt that was done

Look at fuel trim on that bank, it should be rich

Check & clean MAF Sensor & all intake ducting for vacuum leaks
Smoke test intake & manifold, as well as exhaust before cat if you need to

If fuel pressure is good & only one bank is rich scope O2 Sensor
to confirm then scope the injectors on that bank & you will se if they stick

May have to remove all injectors & mail away for ultra sonic cleaning

Feb 17, 2013 | Jaguar S-Type Cars & Trucks

2 Answers

After testing the MAF sensor, changing the PCV & CO sensors, I still get the check engine light, 1999 ford explorer sport 4.0 SOHC 6 cyl I've read to check the intake manifold and then go fu


What is a CO sensor? Never heard of it. a 1999 OBD2 ford has approximately 1600 possible fault codes most of which can turn on the light. If you dont know which one is turning it on, you are guessing randomly which is expensive and usually unsuccessful. get the code(s) and then diagnose the possible causes. The vehicle you list (99 4L explorer) rarely had injector problems. Much more common were EGR sensor(DPFE) sticking at voltage, evap problems, misfires, and lean conditions due to dirty MAF, or vacuum leaks. get the fault code, or you will not fix the problem.

Dec 29, 2012 | 2007 Toyota Land Cruiser

1 Answer

P 0171 (m)


PO171 refers to "system too lean - bank #1", This means that the upstream oxygen sensor detected too much oxygen in the exhaust. Cleaning out the MAF (mass air flow) housing and sensor will help eliminate the PO171 code. It's also necessary to clean the upper portion of the engine and fuel injectors, to make sure they are not clogged or "fouled." check for vacuum leaks and around intake manifold. spray around manifold with engine running, if it flares up you have a leak. in most cases. cleaning the MAF sensor does the trick !

May 03, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Hesitation on acceleration


Most common problem is a failed mass airflow sensor. Remove sensor and carefully inspect the sensor for debris building up on the diode. Another possibility is the egr valve may be partially stuck open. The upper intake manifold is made of plastic. The egr gases enter the intake just behind the throttle body inside the plastic intake. It is pretty common for the hot exhaust gases to burn through the plastic and possibly cause coolant to enter combustion chambers. A restricted catalytic convertor from previous engine misfires will accelerate this due to exhaust gases having no place to escape.

Mar 25, 2012 | 2000 Buick LeSabre

2 Answers

No power backfires,engine code PO134,replaced 02 sensors,map sensor,idle air sensor,throttle position sensor,took to chrysler,paid 150.00 to check,they said they need more time & money.Is a 2000 ULEV...


p0134 is the upstream 02 sensor staying center and will cause a drivability problem. you don't need to replace both of them, the one at fault is the upstream one, mounted on the exhaust manifold.I do it under the vehicle while on a lift, if you can see it from behind the engine and access it, just remove it. spray it down with some penetrating liquid before attempting to remove it

Oct 20, 2011 | 2000 Plymouth Neon

2 Answers

I have a 2000 ford expedition 5.4L and I just replaced my intake manifold and am having a lean code in bank one. I've checked the MAF sensor and vacuum lines and there good. do you know what else could...


You had the intake manifold gaskets replaced ,causing
a vacuum leak & thus a lean condition ?

Have the front (2) O2 Sensors been replaced at 100,000 miles
They will be in the converter inlet or pipe before it

Bank 1 is the right or passenger side
If you do an O2 sensor do bothe side if you have daul exhaust

As you said you can not have any vacuum leaks in the ducting
buy the air filter,maf or anywhere

O2 Sensors also come loose from the heat & thus exhaust leaks
& codes
The sensors doesn't know where the air comes from & just reports
what goes past it

Aug 05, 2011 | 2000 Ford Expedition

3 Answers

CODE P0171 KEEPS ON COMING BACK ON,REPLACE O2 AND MAP


Hi Jonah,

I have the same problem and it only propped up after i had my exhaust manifold repaired, do you think the mechanic didnt do the weld it right?

James
2001 Saturn L200

Apr 27, 2010 | 2000 Saturn SL

2 Answers

How do i replace a mass flw air sensor on a 1998 chevy blazer 4.3 engine


The mass flow sensor on the 1998 Blazer is along the intake tube right after the air filter intake housing. Loosen the two clamps that hold the MAF sensor between the Air filter box cover and air intake tube, disconnect the wire leads at the MAF sensor connection and remove the MAF. Note it's uncommon for the MAF sensor to go bad and 95% of the time, cleaning it with MAF sensor with MAF cleaner will fix any problem it may of had to trigger the DTC codes.
Start with trying to clean it first just by following the instruction on the MAF cleaner. This should save you time and money to get your Blazer running 100% again soon.
Good luck and thank you for using Fixya.

Mar 17, 2010 | 1998 Chevrolet Blazer

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