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Questions tagged [o2-sensor]

Questions and discussions about oxygen (O2) sensors. Oxygen sensors are used to measure the exhaust gas concentration of oxygen for internal combustion engines in automobiles and other vehicles.

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Matching up connections on O2 Sensor for 2001 Honda Accord

I purchased a new O2 Sensor for my 2001 Honda Accord and I cannot understand why it has a female plug and not a male plug as the existing one has so I assume I have to move the wires from the new unit ...
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1answer
35 views

Test 3 wire NTK, Bosch O2 sensor signal after heat up, but, not signal. Why?

I have a 1996 Nissan Altima O2 + Catalytic converter not ready. I want make sure O2 sensor really work. Upstream sensor (before CAT) work by measuring voltage when heated up with torch. Downstream ...
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1answer
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O2 sensors located

need to know on a 2012 dodge caravan sxt v6 where are the o2 sensors located. Esp. upstream sensor 1 bank 1? Tried to look for them from above but no luck so far.
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1answer
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2001 Vw beetle 02 sensor car will not go over 65mph

I have a 2001 vw beetle 2.0 engine with 171,000 miles on it. I have a check engine light on saying that bank 1 lean. It has been like this for years and I have had no problem with it. Yesterday I ...
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1answer
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2003 toyota sequioa oxygen sensor upstream color code diagram

2003 toyota sequia 4wd engine side the harness connector ripped, i need the color code.Engine side the wires are green with red stripe, green with white stripe, black, white I dont know how to rewire ...
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0answers
645 views

My BMW X5 won't stay running

Hello I have a 2003 BMW X5. I just got the engine replace a couple days ago. I went to pick it up but because the shop was done installing the motor but now I have to deal with the other problems I ...
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0answers
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Nagging P0430 (and now a pending P0420 too!) 2004 Lexus ES330

I've got a 2004 ES330 (2nd owner) with roughly 315,000. We didn't pay much for the car in 2012 with 164,000 miles. So, i've never gone overboard in maintenance of it. A year ago, when it was time for ...
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0answers
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Gasket Shellac on Flange gasket Dripping on O2 sensor Jeep XJ

Background I recently replaced some cracked headers on my Jeep XJ. When attaching the new headers to the exhaust with a flange gasket I didn't slide the graphite gasket ring on correctly and it went ...
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0answers
352 views

What is the normal voltage of 5-wire oxygen sensor (lambda probe)?

I have got a 2007 Opel Vectra GTS 2.2 Direct car (which still has a high pressure fuel pump problem, yet to be solved). Petrol, 114 kW, engine Z22YH. After getting an P0130-52 (No Plausibility ...
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0answers
818 views

P0420 Catalyst efficiency below threshold bank 1 With CO emission only!

I saw this code in OBD2 scanner on Skoda Fabia 1.2 2006 64hk petrol. It doesn't matter to me except that the car failed the inspection and I'm not allowed to drive it any more. The problem was too ...
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0answers
110 views

HP Tuners disable downstream O2 sensors (FAOSC)

I deleted my catalytic converters on my Ford Taurus 2013 N/A because was giving p420 CEL, and tuned with HP Tuners to disable CEL from p420 , p430 and disabled catalyst test and downstream O2 heaters ...
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o2 sensor problem

I have a SEAT Toledo 1.6L 16V with engine code AZD. I was getting an error code for the Bank1 Sensor1 because of a blown fuse but I didn't know that then and I replaced the Bank1 Sensor 1 with this ...
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233 views

2001 Toyota Rav4 O2 sensor change

When changing O2 sensor B1 S2 on 2001 rav4 do you have to loosen the engine mount to access sensor with o2 socket, or is there an easier way?
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0answers
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2002 Nissan Sentra XE (1.8) bogs down under heavy acceleration

This is my first time asking for help here so please bear with me. As the title says, my 2002 Sentra XE bogs down when my try to accelerate hard. It's more noticeable from a stop, but seems to do ...
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0answers
2k views

Affect of burning oil on O2 Sensors

I got a P0420 code and took my car to have a service and an investigate. I was told my car failed an emissions test and that is likely because the O2 sensors have failed causing a rich mix and higher ...
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0answers
72 views

Translating raw CAN responses into meaningful min/max/value

http://www.scangauge.com/support/x-gauge/xgauges-for-cansf-vehicles/ This website lists data reported by certain sensors. Lets take an example: Gauge = Short Term Fuel Trim Bank 1 TXD = 07E00106 ...
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29 views

AF/O2 and Fuel Trim data - Normal or not?

I'm learning to diagnose my car's poor gas mileage: Car: 2010 Toyota Matrix (Base). Engine: 1.8L, 4 cylinders, Auto, FWD. ODO: 103,000km (64,000 miles). City gas mileage: 12.6L/100km = 18.6 mpg (...
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Does anyone know the OEM for the 2006 Infiniti qx56 oxygen sensors

I've got the part numbers and some cross references for the 2006 Infiniti QX56 oxygen sensors, but I would like to buy from the OEM. Bosch? Denso? infiniti front left/right 226937S000 bosch 17204 5 ...
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0answers
51 views

Check engine light won't stay off

I've attempted to get my check engine light fixed a couple times and at each repair facility they've scanned the code and told me it was a bad oxygen sensor. I had the oxygen sensor replaced at both ...
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0answers
166 views

p0140 and p0172

I have a 2005 Elantra (205K miles). I replaced the second o2 sensor (downstream; after cat), added a defouler to second o2, replaced cylinder # 2 injector, air filter, tune-up. If the car is at idle ...
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0answers
20 views

1996 Infiniti g20 fails smog

I am the original owner of this CA car, and have been gradually having higher HC readings on smog checks. It failed in 2016, cleaned out the Air flow components; it passsed, but this increased the NO ...
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0answers
112 views

Variance - What is on the Vehicle and what the FSM states

2007 Honda Accord Manual Transmission DTC indicated: P1157 Usual remedy is to replace the oxygen sensor But I wanted to follow the diagnostic tree in the service manual until I discovered something ...
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0answers
76 views

Frequent Oxygen Sensor dirty problems (volvo diesel)

I have a volvo S60 diesel for 10 months (more than 30.000 Km), and I already have to clean the oxygen sensor once and seems that I have to clean it again. My question is what can I do to reduce the ...
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0answers
47 views

Need help fast with my truck please

My 1994 dodge Dakota v8 starts fine and ildes fine. If I drive for about 10m my engine light comes on and my code for the 02 sensor goes off. My truck is straight piped and has no cat it has a steel ...
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0answers
129 views

1991 Chevy Astro - O2 Sensor and Low Compression

I have a 91 Chevy Astro van with 15x,xxx miles. It idles very rough and drives extremely poorly at around 40mph, and, overall, seems to lack a bit of power. A compression test was performed on the ...
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0answers
24 views

Why are my oxygen sensors staying at 1.275v most of the time?

I have an old Volvo s40. Because I had gotten a P0420 code and because of it, an OBD scan tool, I noticed that my fuel trims were very high. Or they could be the result of the age of the car (17 years ...
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147 views

O2 Sensor Voltage Output

I have an Acura legend (1995) that I did a header swap on and replaced the o2 sensors. They aren’t connected as of now and the car is running rich because of it. If I wanted to trick the car into ...