Camry :: 2003 - P0031 With New A/F Sensor?
Nov 2, 2012
It's time to go thru emissions testing, but I'm getting a P0031. New A/F Sensor (Denso 234-9041) did not fix it. California Emissions compliant.
2003 Camry, 2.4 16-valve
Car runs good, MPGs same as always, 26/27 and 30+
Old sensor has no resistance or continuity thru any of the pins.
New sensor has 2.5/2.8 ohms res between blk/blk pins. (? +B and HT ?)
200K miles, has burned oil since I got it w/ 140K. Have had MIL light on for two years, but did not care until now. Previously had diff DTC's, not P0031.
Swapped EFI relay with Headlight relay, no change.
Checked all fuses, all OK.
Cleaned ground on engine block and fender, no change.
Checking voltage at engine connector, sensor disconnected, car running, I'm seeing
Orange 3.31 = Blue Sensor wire (AF+ ?)
White 3.017 = White Sensor wire (AF- ?)
Blk/Red 3.827 = Blk Sensor wire (HT ?)
Blk/Wht 13/14 = Blk Sensor wire (+B ?)
I cannot find FREE online wiring diagrams anywhere. I have searched TN exhaustively, have not found anyone who actually fixed this problem, or provided a link to a wiring diagram.
So, which wire is the ground ? Should it show 0 voltage ? Is it controlled by ECM ? How do I test the ground continuity ?
Where is ECM located ? I want to unplug and re-plug.
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I own a 2003 Camry LE. I went to Autozone to find out what the check enginge light was for and was given P0031. When the service person checked it out on the computer he said the probable causes were:
1) open or short circuit conditions
2) poor electrical connections
3) failed oxygen sensor
4) EFI relay fault.
I asked how it could be narrowed down and he said it I would have to get the car checked out.
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I have a check engine light come on in my 07 Avalon and had the car scanned. It was throwing error code P0031. I'm gonna go ahead and replace this O2 sensor, however, I'm having a hard time finding the correct part# for this sensor.
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Both the P2195 (Oxygen sensor or A/F sensor stuck lean - bank 1 sensor 1) and P0031 (Oxygen sensor heater control circuit low - bank 1 sensor 1) were pulled on my 2009 LE (77K miles). Is it safe to assume that the upstream b1s1 sensor is the culprit?
I believe I've found the OE Denso part 234-9056 - is this the right one?
General question about O2 sensors - is it recommended to replace both the upstream and downstream at the same time, or is it not necessary to do that?
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I received error code P0031 on my 06 Avalon the other day. It states that the HO2S (Heated Oxygen Sensor) is bad. Bank 1 Sensor 1. I located the sensor but have a few questions...
Just to give an over view for those that don't know where these are, there are 4 sensors the one in the front on the manifold (upper - B2, S1), (lower - B2, S2) and the rear manifold (upper - B1, S1), (lower - B1, S2).
All of the sensors look the same with 4 wires. what the part number is for the sensor? Also since this is the hardest one to get to, I would like to know where the wire routes to. I found the wire up to the connector on every other sensor except the one I need (B1S1). It looks like it runs towards the top of the engine but from the top I don't see it.
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Check engine like on my 03 Camry with 2.4L is own & got an OBD code of P0031. Just bought the car with 38k miles one owner & can't pass local emissions.
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Alright, so I've been battling this for a few hours. I know I need to replace a sensor, and that's about it. The issue, is I don't know if I need to replace an oxygen sensor or an air fuel ratio sensor. I have searched, but I keep finding conflicting information. So which do I need?
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What to do to get rid of P0031 check engine code on my 4 cyl. Camry LE. He replaced O2 and A/F sensor (Denso with CA emission), computer module (got dealer calibrated it), verified wiring/voltages, inspected the catalytic converter. When the code is cleared it will not come up for some time, but when the car is started cold it comes right back again.
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I have 2 x P0031 and 2 x P0051 after an accident. I rear ended an SUV. My hood got bent and the radiator got pushed in. The body shop said they don't think it was due to an accident. I can't possibly have 4 sensors go on me.
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My check engine light says the primary 02 sensor is bad. Camry 4cy has 104000 miles. Do I need to use OEM or will the generic work? I hear they hide a way to shut the check engine light off and sometimes the 02 sensor isn't even bad!
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I thought this strange occurrence I am about to describe was maybe happening because of a faulty air-fuel oxygen sensor, that I knew was bad do to a code test that was done, when my check engine light came on. However, after changing the air-fuel oxygen sensor, doing a reset on my check engine light over the weekend, this same occurrence is happening, to spite the check engine light remaining off. Here is what is happening.
When I start and drive it to normal driving temperature then put the car in "Park" with nothing turned on, the car will shake the idle speed will move up and down until it will eventually kill.
Special Note: It does not always have a idle drop and kill the engine every time. If I turn the A/C on in "Park" it idles up higher and does not ever kill. Could it be a bad Idle Air Control Motor?
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Any resource that I can use to find the part number of the O2 sensor on my wife's 03 v6 Camry.
I have a check engine light, scanned by code scanner to reveal P2195. This OBD code is supposedly sensor 1, bank 1 "stuck lean" which is the upper O2 sensor on the left side of the engine (closest to radiator with transverse mounting).
So it should be easy to change if this is the issue but I'm having a hell of a time finding the right part number. Too many choices.
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I just had an OBD code pulled on my 2010 Camry and it turns out that my Heated O2 sensor for Bank 1 Sensor 2 is failing. I'd rather do this myself if I can but I can't figure out where this thing is. Is this something I can access myself and swap out? Or does this need to be fixed by a mechanic?
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About 2 months ago, the check engine light came on and I had the code read, it came out as P0031, which is the 02 Sensor. Today, I had this 02 Sensor replaced and had the code reset, but later on today the check engine light came on again. The mechanic said I needed to drive it for about 100+ miles before the car resets itself. I drove it for about 30 miles before it did come back on.
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VSC, Check engine light just came on my 2006 GS300. I only have 50k miles on it. I had this happen a few years back and it was the Gas cap o-ring. This time I changed the gas cap and reset the codes but no luck. After starting the car, with a minute the lights come back on. So checked the code and here is what I'm getting:
P0031
Heated Oxygen
Sensor Heater
Control Circuit Low
Bank 1 Sensor 1
Doing a search for the code yields this: [URL] .....
Changing the sensor vs. checking something else that might be the issue?
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2007 GS450h Lexus owner, and have got a few error codes appearing on her They are as follows:
Quote:
P0031 - Powertrain
HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
P2195 - Powertrain
O2 Sensor Signal Stuck Lean bank1 Sensor1
P2238 - Powertrain
2) O2 Sensor Positive Current Control Circuit
Low bank1 Sensor1
P0138 - Powertrain
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
Am I right in saying, these are all just a dodgy bank 1 sensor 1 (engine bay) and possible sensor 2? Is replacing them myself feasible?
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My girlfriend drives an 09 corolla (1.8L I believe). I have an OBDII bluetooth reader w/ Torque App so to identify the issue I can get some data:
Last week I was driving the corolla and I got P0031: HO2S Heater Control Circuit Low (Bank 1 Sensor 1). Car seemed to run fine without any issues. My girlfriend brought her car in to her "mechanic". "mechanic" who will replace have of your engine only to realize that your gas cap was cracked. He apparently replaced 02 Bank 1 Sensor 2 (I'm still trying to confirm this and to get the part # to make sure). He reset the ECU and she drove for about 30 miles after which these codes popped up:
P0172: System too Rich (Bank 1)
P0101: Mass or Volume Air Flow Circuit Range/Performance Problem
The car was idling rough. I reset the codes and the car was running fine until all monitor systems were ready. When Catalyst, 02 Heater & 02 Sensor are not ready everything is running fine and I don't see any error codes. I cleared ECU a few times. The last time I was able to drive for over 20 miles without any issues. Currently the only sensor not ready is 02 and car is running fine but I have a feeling once its ready the car will start having issues again:
Summary (if you don't want to read everything)
*P0031: H02S Heater Control Circuit Low (Bank 1 Sensor 1) - Car runs fine
*Mechanic replaces 02 Bank 1 Sensor 2 (Trying to find part # and double check sensor name)
*ECU reset and car runs fine for 30 miles
*P0172: System too Rich (Bank 1) and P0101: Mass or Volume Air Flow Circuit Range/Performance Problem
*ECU reset - car sputters and hesitates
*When all monitors are ready same codes (P0172 & P0101)
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I've tried everything I can think of and it still runs sluggish.
1. Had dealer change plugs
2. Changed Cop's
3. Cleaned MAF sensor
The 5.4L has slight miss and doesn't respond well at all when trying to pass or going uphills.
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I have a 2007 Camry Hybrid with ~150k miles, 4-cyl engine and last week the water temp gauge starting fluctuating erratically...going from extremely hot to cold and vice versa. It eventually tripped the check engine light and autozone said it was p0117 - Engine Coolant Temperature (ECT) Circuit Low Input. At one point the engine was really shaking the whole car. I haven't driven the car as a result.
I have ordered a new ECT sensor and it should arrive this week. the problem is I can't find where the sensor is located... I have looked all over this forum, google, the internet, nothing. I have looked in a Chilton's manual but it doesn't have a diagram.
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5 months ago I replaced the O2 sensor on the upper part. Now getting a reading that the Catalytic is not performing right. Is there another sensor that could be bad or the one i replaced is bad? Or is there a way to clean out ?
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Have been looking @ my 2010 2.5L I4 and there seems to be a gradual leak around this sensor just below the valve cover. What sensor this is, and how to fix the leak?
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