Oxygen Sensor, Exhaust, Engine Check Light On

[rav4lkl]

My Rav4 is 1999, 4 doors, basic 4 cylinders 2.0.
1. I got the engine check light on for code P1133 and someone told me is Oxygen sensor needs to be replaced. I replaced the sensor (front) but the check light is still on. how come? It's after market part, I cut the wires and connected to the original plug because the new plug din't fit. Can 2 white wires (for heat element) be connected either way to original 2 black wires?
2. I went to test the code again and got P0171, P1130, and P1133.
Anybody can help?

[hd72m]

1st a check engine light tells the "area" where the trouble is. It could be sensor is reading too much gas or have bad connections or a host of other things.
It can cost a bundle when you throw parts at it to try and fix it.
2nd you should never have to cut off connectors for the right part.
Ask friends or call around and find a good local repair shop,do not use tire,trans or muffler shop.

[rav4lkl]

Originally Posted by hd72m

1st a check engine light tells the "area" where the trouble is. It could be sensor is reading too much gas or have bad connections or a host of other things.
It can cost a bundle when you throw parts at it to try and fix it.
2nd you should never have to cut off connectors for the right part.
Ask friends or call around and find a good local repair shop,do not use tire,trans or muffler shop.

Thanks for replying me but you didn't answer my questions.
I don't have to post message here if I go to car repair shop.
The O2 sensor wires I cut because the new sensor plug didn't fit the old one.
Does anybody know 2 same color wires on O2 sensor can be connected either way in turn? I know they are heat element terminals in the sensor.

[Jazzy]

Originally Posted by rav4lkl

Thanks for replying me but you didn't answer my questions.
I don't have to post message here if I go to car repair shop.
The O2 sensor wires I cut because the new sensor plug didn't fit the old one.
Does anybody know 2 same color wires on O2 sensor can be connected either way in turn? I know they are heat element terminals in the sensor.

P0171 - System too lean. (Probably due to no signal because you cut the sensor off)
P1130 - Air/Fuel circuit out of range. (Probably due to no signal because you cut the sensor off)
P1133 - Air/Fuel circuit no response. (Probably due to no signal because you cut the sensor off)

So what sensor did you replace it with? I ask because as previously stated, if you bought the right part, you shouldn't have to cut anything.

I'm concerned that you have bought the completely wrong sensor and may have used a wideband sensor on in place of the factory narrowband.

This would explain why the check engine light is still on.

[rav4lkl]

Originally Posted by Jazzy

P0171 - System too lean. (Probably due to no signal because you cut the sensor off)
P1130 - Air/Fuel circuit out of range. (Probably due to no signal because you cut the sensor off)
P1133 - Air/Fuel circuit no response. (Probably due to no signal because you cut the sensor off)

So what sensor did you replace it with? I ask because as previously stated, if you bought the right part, you shouldn't have to cut anything.

I'm concerned that you have bought the completely wrong sensor and may have used a wideband sensor on in place of the factory narrowband.

This would explain why the check engine light is still on.

The code P1133 existed before I replaced the new sensor.
Are after market O2 sensors can be used? Many O2 sensors selling in the market without the plug, just with 4 bare wires and have to be connected with the exist plugs by the buyers. I cut the wires and connected with the exist plug is the same situation like to buy senors without the plug.
I have already tested with the meter and connections are fine.
So the question is if can't cut the wires to connect the right plug, why there are so many after market sensors without the plug selling in the market.

[hd72m]

$$$ is why.
I bet if you look it will say no refunds if used.

[Jazzy]

Originally Posted by rav4lkl

The code P1133 existed before I replaced the new sensor.
Are after market O2 sensors can be used? Many O2 sensors selling in the market without the plug, just with 4 bare wires and have to be connected with the exist plugs by the buyers. I cut the wires and connected with the exist plug is the same situation like to buy senors without the plug.
I have already tested with the meter and connections are fine.
So the question is if can't cut the wires to connect the right plug, why there are so many after market sensors without the plug selling in the market.

To quote you: "Thanks for replying me but you didn't answer my questions."

What was the replacement sensor? Is it wideband or narrow band?

Wideband WILL NOT WORK. Wideband sensors are designed to connect to a wideband O2 controller, hence the lack of a plug. You can't connect them directly to the ECU.

I just did a quick eBay search and every narrowband replacement RAC4 sensor I found had a plug.

[barberoux]

Some Rav4s, like mine, have an air/fuel sensor in lieu of a O2 sensor. The electrical plugs are not compatible and won't fit unless you get the right one.

[Jazzy]

Originally Posted by barberoux

Some Rav4s, like mine, have an air/fuel sensor in lieu of a O2 sensor.

Ok, I thought I knew a little bit about cars. But you're telling me an O2 sensor is different to an air/fuel sensor? Damn. My world just came crashing down around me.

[drcoffee]

If you bought a Bosch O2 sensor, they don't work well on Toyotas from my experience. You should look on rockauto.com and buy the Denso O2 sensor. The harness you cut should be a part you can find at a junk yard or on ebay. cutting and connecting O2 wires doesn't work well because it changes the resistance of the wires the meter runs on.