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0
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1answer
28 views

Location of O2 sensor on 1990 Toyota pickup

I'm trying to locate the O2 sensor on my 1990 RWD 22R 2.4 Toyota pickup truck. I've looked all over underneath the car by the driver's side seat. There is no O2 sensor on top of the exhaust pipe, ...
4
votes
1answer
34 views

For the love of all things sacred, what technical reason was there for GM to put a different connector on each side for the rear oxygen sensors?

I just busted my knuckles breaking the oxygen sensors free in hopes of swapping them to see if the problem stayed on the driver side or went with the sensor. Only to find out the connectors are ...
3
votes
1answer
28 views

How long will my motor last having clogged catalytic converters?

My catalytic converters have been clogged for awhile, and the o2 sensors need changed because of this. What is it doing to my engine? And gas mileage for that matter? If i take out my ...
5
votes
4answers
318 views

Can an O2 sensor cause faulty spark plugs on driver side only when the spark plugs were just changed?

I took my truck (2006 chevy silverado 5.3l v8) to chevrolet dealership due to the fact that it kept sputtering then dying. The check engine light was on the whole 9 yards. The fuel pump has been ...
2
votes
1answer
295 views

Changed O2 Sensor and my mileage went down

I changed the O2 sensor on my 97 Mazda 323 BA 1.8L BP DOCH Lantis and my mileage actually went down. The car had the original sensor in it, with about 200,000 kilometers on it and I replaced it with ...
2
votes
1answer
20 views

Using dry moly lube as an alternative to anti-seize

While shopping for some anti-seize for my O2 sensor install, I came across some transmission lube that had me wondering about whether I could use it as an alternative to anti-seize. It appears to ...
1
vote
1answer
40 views

Low MPG for my Ford Focus 2005

I have been driving this car for some time now (Ford Focus ZX4 2005). I have been seeing 25 - 27 MPG every time I fill up. I drive a little (10 min) in city and then the rest of my destination on the ...
3
votes
1answer
85 views

Oxygen sensor PID for 2004 Toyota Camry 4-cyl

My 2004 Toyota Camry with 170k miles is pulling a P0420 code, which I've read can be due to a bad catalytic converter or O2 sensors. I have an OBD-II tool with the DashCommand app on my iPhone. ...
3
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0answers
55 views

O2 Sensor - 1998 Toyota Camry 2.2L 4-cyl

I was getting a few error messages p1135 being one of them, which seems to indicate that the O2 1st bank 1st sensor should be replaced. My car is 4cyl, so there is only one sensor under the hood (pre ...
6
votes
3answers
46k views

Check Engine code P0420 Catalyst efficiency below threshold bank 1

After months of normal driving with no problems, my 2003 Honda Civic EX check engine light came on during a long trip. Got it scanned and it's P0420: Catalyst efficiency below threshold bank 1. They ...
4
votes
1answer
125 views

Do I have to rely on wire color to correctly wire up an O2 sensor?

It seems that everyone and their grandmother has a different color-code convention for 4-wire O2 sensors, which complicates matters when one is trying to wire up a replacement "universal" O2 sensor. ...
9
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3answers
691 views

Is 60/40 solder fine for splicing wires that have to endure hot engine bay temps?

I need to splice the pigtail connectors from my old O2 sensors onto the new O2 sensors since the new connectors have a different shape. As the sensor is right behind the engine and will experience ...
1
vote
1answer
81 views

Replaced 02 sensors, engine light still on

I recently bought a second hand VW Golf. It was 'serviced' and MOTed before the guy sold it to me. He said three 02 sensors were replaced during the servicing. The day I drove it away, the engine ...
4
votes
1answer
62 views

Why would one install widebands on vehicles that are setup for narrowbands?

A recent post on one of the forums I frequent has piqued my curiosity. From my limited reading on the topic, widebands do a better job of quantifying air-fuel ratios than their narrowband ...
2
votes
3answers
311 views

P0420 in a Prius

EDIT #2: I rescanned, looking at the correct data, and found the rear O2 sensor was definitely bouncing up and down with the forward sensor's lambda reading. Since I have looked for leaks and ...
6
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4answers
41k views

Sputtering while driving & idling

[My car: 2004 Mazda 3] So, my wife came home from running some errands and told me the check-engine light was on and that the car was sputtering and felt like it was going to stall while stopped at ...
4
votes
3answers
22k views

How do I resolve error code P1135 in my Toyota Camry?

I recently replaced the downstream O2 sensor in my Toyota Camry. Shortly thereafter, the check engine like came on again providing the following codes: P1135 which I understand to be the upstream ...
4
votes
2answers
175 views

How much improvement from replacing an O2 sensor?

I'm currently getting about 19.6 mpg city in my 97 Mazda Lantis 323 / Protege 1.8L. According to fuelly a car like this should be getting around 26 mpg. The car has about 127k miles on it, and I ...
0
votes
1answer
255 views

Can faulty O2 sensor cause omission check engine light?

I have had a check engine on a 2001 Subaru Legacy for some time now. Went to mechanic to fix few other things and he told me the oxygen sensor and catalytic converter needs to be replaced. The ...
1
vote
1answer
69 views

Location of O2 sensor on '97 Geo Metro

Where is the O2 sensor located on a 97 Geo Metro (4 cylinder)? I have looked at the whole exhaust system. The check engine light is on, and the code indicates that the sensor is defective. I'd like to ...
4
votes
1answer
63 views

Exhaust on a replaced motor

I recently had to change the motor in my 2004 Hyundai Sonata. I bought a used one from the junkyard, and it fired right up after I got it put in, and all the wires, hoses, etc. connected. The only ...
3
votes
2answers
200 views

How to Unscrew stuck O2 sensor in a 2001 Honda Accord, with a F23A4 engine?

I have been trying to unscrew my faulty O2 sensor (to replace it with a new one I purchased), per the following instructions: ...
3
votes
1answer
70 views

Can I use the same AFR sensor on both banks (bank 1 sensor 1 and bank 2 sensor 1)

Have 1mzfe (skip this paragraph if you don't want backstory) codes p1135/p1130/whatever the ones for the other bank are/ all showed up at the same, perfect time. ie when I was broke. Since then car ...
1
vote
1answer
302 views

How to install a California oxygen sensor into a federal catalytic converter assembly?

I have a 2000 Mitsubishi Galant ES 2.4L Engine with California emissions. Installed is a new federal catalytic converter assembly. The problem is that I do not know what kind of oxygen sensor to ...
2
votes
1answer
221 views

How to fix O2 sensor system?

After getting some type of P116x primary heated O2 sensor error (I forget the exact error), I replaced the primary O2 sensor on my car. (I had to make a bracket for the electrical connector because ...
5
votes
1answer
12k views

P0136 Bank 1 Sensor 2 - Sensor location

I'm getting P0136 bank 1 sensor 2 circuit malfunction from my Toyota Camry 4 cylinder, which from past experience means I need to replace it. I've replaced the O2 sensor in the exhaust manifold ...
6
votes
1answer
2k views

P2238 Positive Current Circuit Low on Toyota Camry 2004

I'm getting P2238 Positive Current Circuit Low from my car, for O2 Sensor in Bank 1 Sensor 1 for my Toyota Camry 2004 (4 cylinder). What is it and how can I fix this problem? From what I've read on ...
3
votes
1answer
671 views

Subaru Forester OBD Scan Codes “P0130” and “P0130 P”

My 2002 Forester Check Engine light is on. I connected an Autel MaxiScan MS300 OBD-II scan tool and got indication for two codes. Browsing through the codes, it reads P0130 and P0130 P. The first one ...
3
votes
2answers
4k views

Mass Air Flow Expected Values

I have a 2002 Audi A4 Quattro 3.0. I have a Vagcom USB cable and I am trying to diagnose the MAF sensor. I had a friend get some readings from an OBD2 scanner, which indicated that both precat O2 ...
3
votes
2answers
125 views

Where can I buy the 2005 Mazda 3s 2.3L oxygen sensor plug?

I bought an oxygen sensor with the wrong plug. I wonder were could I buy a plug like the one on my car in order to connect the oxygen sensor properly? This is an image of the plug on my car. Does ...
1
vote
2answers
281 views

Toyota manual transmission problem

I took my 2003 Toyota Matrix in to the dealership for service. It has 105,000 miles - the oxygen sensor needed replacing, but no other issues found. Now I feel as though I need to shift to a higher ...
3
votes
1answer
351 views

CEL code 43 on 1992 Civic

I'm getting CEL code 43 after doing a lot of work on my car (changing the head gasket, which involved removing and reattaching lots of exhaust and intake components, and replacing the fuel filter and ...
2
votes
1answer
1k views

High short term fuel trim on one side when starting car?

2003 Ford Crown Victoria V8 Engine Dual exhaust 2 cats & O2 sensors per side Since some time last year I've been getting an error code throw up, with seemingly no regularity: P2197 - O2 stuck ...
3
votes
1answer
475 views

O2 Sensor Error after replacing spark plugs?

Ford Taurus 2004 Sedan SES DOHC. (The car is actually in the shop right now and I told him to hold off until I get more info.) Took the car to the local shop to get the spark plugs replaced. Because ...
3
votes
1answer
2k views

How do I repair the O2 sensor in a 2001 Toyota Camry?

I have a 2001 Toyota Camry and the O2 sensor near the front of the car is bad (this is confirmed by the code that the computer has returned). Though I'm not particularly knowledgable about cars ...
2
votes
2answers
655 views

Find short circuit in your car

I have three engine code on, two for two O2 sensors and one for EGR Value ($350). My mechanic is suspecting a short somewhere. My O2 sensors give almost 0 home resistance when it should give about 6 ...
-2
votes
2answers
531 views

Check engine light on for O2 sensor (Oxygen) but O2 sensor has been replaced

Someone told me it could be a minor leak somewhere but the check engine light does indicate the above on Mazda 626,year 2000. Could the code be misleading?