2002 Camry P1130 Issues, Need some tips please! - Toyota Nation Forum : Toyota Car and Truck Forums

mocha225 · 10-03-2007, 11:05 AM

Hi all, first poster here.

I'm trying to help a friend with his 2002 Camry. He recently had some DTCs (he doesn't know which) and took it to a shop. They replaced the MAF sensor and the codes went away for a short time. Now they came back, this time he went to me instead.

I scanned it and it has a P1130. I also was looking at the sensor outputs and there is no output coming from sensor 1 bank 1. According to various websites, the P1130 has something to do with sensor 1 bank 1 being out of range.

Anyway, the question is, I'm having a hard time finding out which sensor is sensor 1 bank 1. When I open the hood, I see a sensor attached to the vertical exhaust pipe after the header. It's very easy to get to. I didn't jack it up, but it looked like there was another sensor in the cat as I would expect. So which sensor is sensor 1 bank 1?

Also, I've been doing a lot of reading and it seems that this issue may not necessarily be a bad air/fuel sensor, but might have something to do with the MAF sensor. I wonder if the shop he took it to installed a bad one. Is it reasonable to do a resistance check on the A/F sensor, and then check the MAF sensor in some manner? What else should I look for on the various sensor readings?

Any tips or tricks would be appreciated. Thanks!

JSM1284 · 10-03-2007, 11:09 AM

I assume this is a 4-cyl. If so it only has one bank, Bank 1. Sensor 1 is the sensor before the cat, closets to the exhaust manifold, Sensor 2 is after the cat.

bronzemaxell · 10-03-2007, 11:42 AM

Quote:

Originally Posted by mocha225

Hi all, first poster here.

I'm trying to help a friend with his 2002 Camry. He recently had some DTCs (he doesn't know which) and took it to a shop. They replaced the MAF sensor and the codes went away for a short time. Now they came back, this time he went to me instead.

I scanned it and it has a P1130. I also was looking at the sensor outputs and there is no output coming from sensor 1 bank 1. According to various websites, the P1130 has something to do with sensor 1 bank 1 being out of range.

Anyway, the question is, I'm having a hard time finding out which sensor is sensor 1 bank 1. When I open the hood, I see a sensor attached to the vertical exhaust pipe after the header. It's very easy to get to. I didn't jack it up, but it looked like there was another sensor in the cat as I would expect. So which sensor is sensor 1 bank 1?

Also, I've been doing a lot of reading and it seems that this issue may not necessarily be a bad air/fuel sensor, but might have something to do with the MAF sensor. I wonder if the shop he took it to installed a bad one. Is it reasonable to do a resistance check on the A/F sensor, and then check the MAF sensor in some manner? What else should I look for on the various sensor readings?

Any tips or tricks would be appreciated. Thanks!

for camry, if it is 4cyl, bank1 sensor 1 is the one in front, right after the exhaust manifold
if it is V6, it is the one near firewall, right after rear exhaust manifold.

mocha225 · 10-03-2007, 01:49 PM

Yes, I failed to mention, it is the 4 cylinder.

So that means it is the one that is easy to get to.

Is there anything I should try before changing it? Is there a test for the MAF sensor? Thanks!

TRD VVTi · 10-03-2007, 02:46 PM

Quote:

Originally Posted by mocha225

Yes, I failed to mention, it is the 4 cylinder.

So that means it is the one that is easy to get to.

Is there anything I should try before changing it? Is there a test for the MAF sensor? Thanks!

If you have the code for the O2 sensor and it's not functioning, why would you want to test the MAF sensor?

Change it if the wiring checks out.

johnnyzee · 10-03-2007, 05:03 PM

i highly doubt a MAF sensor is the problem, highly doubt!

check that o2 out first.

mocha225 · 10-03-2007, 05:56 PM

Okay, thanks. The only reason I mentioned the MAF sensor is because he just had that replaced before I got involved. I don't know if the P1130 was one of the original codes prior to the MAF getting replaced. All I know is that the car has a new MAF (due to some unknown to me codes) and is now giving P1130. When connecting it to my computer there is no output from bank 1 sensor 1.

bronzemaxell · 10-03-2007, 06:32 PM

please beware what type of sensor your bank1 sensor1 has,there is a difference between oxygen sensor and air fuel ratio sensor, and they are not interchangable, there should be a part number stamped on the sensor. i am leaning toward the more expensive air fuel ratio sensor is the one giving you the problem.

mocha225 · 10-04-2007, 10:20 AM

Agreed, I plan to get the number off of it first before ordering.

Quote:

Originally Posted by bronzemaxell

please beware what type of sensor your bank1 sensor1 has,there is a difference between oxygen sensor and air fuel ratio sensor, and they are not interchangable, there should be a part number stamped on the sensor. i am leaning toward the more expensive air fuel ratio sensor is the one giving you the problem.

Microman · 03-26-2009, 01:52 PM

Wifes car had check engine light on. Bought a code reader from Harbor-Freight Tools, hoping it was just a code because the engine turned 100,000, and that maybe it was just a reminder to have auto serviced. It read a P1130 Code. Which appears to be a air fuel mixture sensor bank one sensor one, if I remember correctly from other URL;s read, and maybe this one.

I suppose I can change this sensor, but I need some clairfication. WHen looking at the engine there is a sensor that is very easy to get to, LOOKs to be an Oxygen sensor and it is right on the top front middel of the engine and is recessed into and under Heat Protection Metal, and is connected to the top right electrical on the engine. When I look towards the bottom where the exhause starts to aim towards the back of the car I can see another Sensor.

What is the device that is between the two sensors? Is that the Cat Converter which is on the front of the engine?

And which sensor should I look to replace and check for connections the bottom one I am guessing?

USing a 39 dollar OBDII device that gives the codes and can reset the codes, at which time I would imagine that the CEL will go out. But did not want to do that until replace a part.

Read one other thread that talked about guy had read that it could be the battery. I only mention this as this is the original Toyota battery in this car, and 2 months ago, my wife was just reading and listenting to the radio while at lunch and had to have AutoClub come jump her to start the car when battery was dead. Just a thought to mention that the battery may be on its lasst legs, Might go by Costco and just invest in a new battery , Take out the old one, and 30 minutes later put in the new. I would imagine that would reset the CEL, and then if the P1130 happens again, I would replace the Sensor that someone tells me too. Either Top one or Bottom one, or one further back on Exhause is that is not the Cat Convertor.

Thanks.

rajvoSa · 01-08-2010, 04:38 PM

I had the same code on my car, 2.4 vvti engine, automatic transmission. Car misfires at low speeds, CEL was on, code was P1130 -> air/fuel sensor. Went to toyota dealership, paid $203 for the new sensor, installed it and I am still having the same problem. My obd2 scanner didnt throw the code yet but car misfires at takeoff. It would cut 2,3 times before it reaches 2000 rpm and than its fine from there on. It only does this in first gear. When idling its fine, around 750rpm, no problems. Did I just spend $200 for nothing?

What else could cause this?
thanks!