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


Seal 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




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When did your Check Engine Light Come On?
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Does your Car Idle Roughly? Reduced Power?

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Other Comments

P0544 Dodge Sprinter
no other symptoms. Just check engine lights and my scanguage gave me the code


P0544 no symptoms

P0174 o2

P0174 Nissan Sentra
shken


P0174 o2 sensor



Other Check Engine Light Codes

P0252   Injection Pump Fuel Metering Control 'A' Range/Performance (Cam/Rotor/Injector)
P0256   Injection Pump Fuel Metering Control 'B' (Cam/Rotor/Injector)
P0289   Cylinder 10
P0332   Knock Sensor 2 Circuit Low Input (Bank 2)
P0338   Crankshaft Position Sensor A Circuit High Input
P0441   Evaporative Emission Control System Incorrect Purge Flow
P0615   Starter Relay Circuit
P0637   Power Steering Control Circuit High
P0864   TCM Communication Circuit Range/Performance
P0871   Transmission Fluid Pressure Sensor/Switch "C" Circuit Range/Performance




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