P0031 OBD Engine Code Logo   Code #P0031 -
HO2S Heater Control Circuit Low (Bank 1 Sensor 1)

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The Code P0031 appears to be related to the Oxygen Sensor that is in FRONT of the Catalytic Converter and that it is reporting a voltage that is lower than expected. Generally this means that either the Oxygen Sensor itself is bad, the wiring is bad/damaged/frayed/etc or that there is a disconnection or broken connection to the Powertrain Control Module (PCM). You should also check your PCM and make sure its operational and all wiring is good as well.

Mazda Mazda3
u0155


Volkswagen Jetta
P0031


Volkswagen Golf/Jetta
P0031


Received this code , also have had loud exhaust due to blown baffes in muffler , wondering if the muffler might actually be causing the code as the code indicates O2 sensor problem 06 Yaris 90K

Chrysler PT Cruiser
has codes p0031, p0037


Mazda Mazda3
p0031


p0031

nothingyet

Mini Cooper
the car will not start


replaced both pre o2 sensors

Kia Sedona
p0051 after 2 mins driving


Toyota 4Runner
HO2S, reappears after erase


2 other codes set @ same time P0204 and P0304

Jeep Grand Cherokee
Just engine light on dash


90030 i have no symptoms the light is currently off on my dashboard as i have cleared it with an obdii. if it illuminates will i need a new o2 sensor or is it a fuse

Ford Ranchero
my car does not have any of the above symptoms what so ever. it seems to run fine which is why i am confused


Check engen light is on

Jeep Liberty
Code 0138


Jeep Liberty
Code 0138 Check engen light on


running very rich, misfiring, and shutting off between start and stops...

Jeep Grand Cherokee SRT-8
upon starting engine yes yes yes yes yes


Unavailable code

PO31

Toyota Yaris
Replaced A/F ratio sensor for 2008 Yaris as diagnosed by OBD II but code still persists. Harness and connector checked and are fine. Engine runs fine without any irregularity. Toyota dealer suggested ECU change but the suggestion was not convincing. What could have caused this beside the A/F ratio sensor ?


no fuel getting to engine

Volkswagen Golf
change cam and crank sensor still wont start


Señal muy alta de sensor de oxigeno

Where is the location of this sensor

engine re-appears after it's erased

The sensor is on

Dodge 1500
When the truck starts the temperature goes all the way up


Golf 2004I already change the sensorand keep saying the same problemoxygen sensor.I have the check engine



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Does your Car Start?
Does your Car Vibrate? Shake?
Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0841 Stuck in park... 2008 Jeep commander sport/xk 4.7L V8 automatic. Symptoms: Shift lever physically moves when attempting to shift from park to reverse, neutral or drive, there is no mechanical action in transmission. Causes engine RPM to fluctuate between 400-700 RPM for 5-20 seconds then idles at a consistent 600 rpm. I have crawled under the jeep while someone is attempting to shift (from park to reverse, neutral and drive) and watched the mechanical linkage moving on the side of transmission. The only error code that pops on the OBD 2 reader is: p0841 transmission fluid pressure sensor.

P0842 when I start the car and put it drive it takes off normal but when it shifts to the other gear it jumps and is alittle sluggish but it shifts again and goes back to normal again

P0139 Kia Spectra
replaced few parts for code po139 and check engine light pops up same cde po139


P0024 p0024&p0021 & p0300

P0811 excessive clutch slippage



Other Check Engine Light Codes

P0042   HO2S Heater Control Circuit (Bank 1 Sensor 3)
P0043   HO2S Heater Control Circuit Low (Bank 1 Sensor 3)
P0044   HO2S Heater Control Circuit High (Bank 1 Sensor 3)
P0050   HO2S Heater Control Circuit (Bank 2
P0161   O2 Sensor Heater Circuit (Bank 2 Sensor 2)
P0212   Injector Circuit - Cylinder 12
P0450   Evaporative Emission Control System Pressure Sensor
P0618   Alternative Fuel Control Module KAM Error
P0714   Transmission Fluid Temperature Sensor Circuit Intermittent
P0992   Transmission Fluid Pressure Sensor/Switch "F" Circuit




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