Question about 2004 Volvo XC90

1 Answer

Vovo XC90 Engine light is on

The dealer says the front oxygen sensor is bad. Is this the sensor that simply screws in the exhaust system. How many are there? Is this something I can replace myself?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 141 Answers

You are correct. Spray with some wd40 before trying to remove as it will help getting it out.

Posted on Jan 30, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

0152 coed


P0152 P0152 - O2 Sensor Circuit High Voltage Bank 2 Sensor 1Possible causes - Faulty Front Heated Oxygen Sensor Bank 2
- Intake air leaks may be faulty
- Exhaust gas leaks
- Front Heated Oxygen Sensor Bank 2 harness is open or shorted
- Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
eplacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem
Symptoms- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust P0152 Description The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

Mar 19, 2013 | 2005 Dodge Ram 1500

1 Answer

Oxygen Sensor location


The oxygen sensors are on the exhaust pipes in front and behind the catalytic converter(s).
Bank two is the side with cylinder number 2, and sensor one is in front of the cat.

Dec 13, 2012 | Volvo Cars & Trucks

1 Answer

What is the best way to remove O2 sensor bank 1 sensor 2?


Here is the low-down on oxygen sensors, and their location designations explained:

Oxygen sensors are screwed into the exhaust system at various points. Some people say that there are 4 oxygen sensors, but technically, that is not correct. Only the front 2 are considered oxygen sensors.

These oxygen sensors are screwed into the exhaust pipe or directly into the exhaust manifold, one on each bank. Because they are in front of the catalytic converter, this is often referred to as 'upstream'.

The other 2 are actually called catalyst monitors. They are oxygen sensors, but they serve a different purpose. They monitor the activities of the catalytic converters, thus the name, catalyst monitors. They are screwed into the exhaust one on each bank, after, or downstream, of the catalytic converters.

On a 4 cyl engine, there are only a total of two such sensors, the one in front of the catalytic converter is the O2 sensor, the one behind the cat is the catalyst monitor.

The location names for them are as follows:
  • On a 4 cyl, the front / upstream is called "bank 1 sensor 1" and the rear / downstream sensor is called "bank 1, sensor 2."

  • On a V6 or V8 engine:

    • the passenger side bank on a forward facing engine, or the bank closest to the firewall on a transverse mounted engine, is bank number 1, so the forward / upstream sensor on that bank would be "bank 1, sensor 1."

    • The driver's side bank (forward facing mount engine), or front bank (transverse engine) would be bank number 2, thus the forward / upstream sensor on that bank would be "bank 2, sensor 1," and the rearmost / downstream sensor on that bank would be "bank 2, sensor 2."

Jul 28, 2012 | 2004 Mitsubishi Endeavor

3 Answers

Where is the oxygen sensor bank 1 sensor 1?


From the 2002 Oldsmobile Alero manual:
A device found in the exhaust manifold, which generates a small voltage dependent on the amount of oxygen present in the exhaust stream, used as a signal to the engine-control computer to determine the amount of fuel necessary to maintain a proper air/fuel ratio.
What this means to me is search the exhaust manifold for it - its screwed into it.
Unscrew it with a specialty oxygen sensor socket (a slotted 7/8-in hex socket) - available for
$10 at any parts store. This is likely the HO2S (heated oxygen sensor) Bank 1 Sensor 1, since
it is before the catalytic converter, the second oxygen sensor (Bank 1, Sensor 2) should
be the one located after the catalytic converter.

codes:
P0130 - HO2S-11 (Bank 1 Sensor 1) Circuit Closed Loop Performance
P0131 - HO2S-11 (Bank 1 Sensor 1) Circuit Low Input
P0132 - HO2S-11 (Bank 1 Sensor 1) Circuit High Input
P0133 - HO2S-11 (Bank 1 Sensor 1) Insufficient Activity
P0135 - HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction

Note the P0131 can be also be caused by a bad MAP (Manifold Absolute Pressure) sensor,
so yank the MAP sensor and check the computer for a lean fuel condition (P0131=low input).

Mar 24, 2011 | 2002 Oldsmobile Alero

1 Answer

Check engine light on, replaced oxygen sensor before catalyst,


  • Water or corrosion in the connector
  • Loose terminals in the connector
  • Wiring burnt on exhaust components
  • Open or short in the wiring due to rubbing on engine components
  • Holes in exhaust allowing unmetered oxygen into exhaust system
  • Unmetered vacuum leak at the engine
  • Bad o2 sensor
  • Bad PCM

Jun 18, 2010 | 1999 Lexus RX 300

1 Answer

Location of oxygen sensors on 2002 dodge grand caravan with 3.3 liter engine after considerable maintance work done by a dodge dealer my gas mileage dropped by as much as 6 to 8 miles per gal. after a time...


The o2 sensors are located on the exhaust system.The upstream in on the rear exhaust manifold and the down stream is in front of the catalytic converter.Usually when they are bad they will make the check engine like go on.Make sure the air filter is clean,tires at correct inflation,alignment is to specs.If the vehicles pulls to one side or the other or steering wheel is not straight when driving down a straight stretch of road.Also tires are wearing normal.Use cruise control where ever on highway.If you let your vehicle warm up in winter.This also uses gas.Hope this helps.Good luck.

Dec 23, 2009 | 2002 Dodge Grand Caravan

1 Answer

MY 2003 TOYOTA SEQUOIA GOT ENGINE AND VSC LIGHTS ON. ON THE DEALER, THE COMPUTER READ A OXIGEN SENSOR B1 S1Y GOT THE PART, I NEED TO KNOW HOW TO INSTALLED AND WHERE IS LOCATED.


That model Sequoia should have four oxygen sensors. There will be two in each exhaust line. One will be in front of the catalytic converter, and one will be behind it.

B1 should mean bank one. This is the driver side. S1 is probably the oxygen sensor located before the catalytic converter; however, I am not certain of the number sequence here.

The sensors screw into the exhaust pipe. They will have wires coming out the top.

Oct 20, 2009 | 2003 Toyota Sequoia

2 Answers

1998 Saturn SL2 engine light


Possible Causes
The following are malfunctions that could cause a rich condition:
^ Fuel pressure too high. Perform fuel pressure test.
^ Leaking fuel injector(s). - Perform pressure leak down test.
^ Vacuum leak around the MAP sensor grommet.
^ Oxygen sensor contamination.
^ Restricted exhaust or air intake.
^ Fuel Vapor Canister saturated with fuel.

IMPORTANT:
If the front oxygen reading voltage is above 600 mV and the rear HO2S is above 600 mV all the time, the O2 sensors are probably not
at fault.

Sep 22, 2009 | 1998 Saturn SL

2 Answers

WHERE DOES THE KNOCK SENSOR, AND OXYGEN SENSOR GO?


The knock sensor is located on the side of the engine block. And the oxygen sensors are located in the exhaust system. There will be one oxygen sensor (upstream) screwed into either the exhaust manifold or the exhaust pipe before the catalytic converter. The other oxygen sensor (down stream) will be screwed into the exhaust pipe just after the catalytic converter.

May 12, 2009 | 1999 Isuzu Rodeo

1 Answer

Engine code p0421


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.

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


To Do list

* 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

Jan 04, 2009 | 2001 Hyundai Sonata

Not finding what you are looking for?
2004 Volvo XC90 Logo

Related Topics:

303 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volvo Experts

yadayada
yadayada

Level 3 Expert

61037 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Mark Jones

Level 2 Expert

76 Answers

Are you a Volvo Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...