My check engine light has been on for three days and when a scanner was placed on it the following information came-up. Trouble code P0031, H02S Heater Control Circuit Low (Bank #1 Sensor #1). However, I do not have a service manual to reference. Please help me out.

Get the suspension springs checked. Park the vehicle on a flat, level surface with no-one in it. Stand back and carefully look at the vehicle. Sometimes when a spring fails the vehicle will lean towards the broken side. The tail ends of the spring can break off when they are old and the broken bits don't always fall out when it happens.
The stall could be something separate. Do you have any warning lights on the dash? If the charcoal canister is starting to fail it often causes the check engine light to turn on as it will affect the emissions. This will trigger other engine sensors to flag up a trouble code.

Check all the fluids in the engine first. If those are good, then take your vehicle to an auto parts store (Autozone, discount auto parts, etc). They have a scanners onsite for most vehicles to get the trouble code/s.

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.

To confirm the problem, the basic troubleshooting is required.

Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------
For OBD code problems check the list of help links below. Click the link below to go through its procedure.--------------Diagnostic Code P2195?http://schematicsdiagram.blogspot.in/2012/02/diagnostic-code-p2195-on-toyota-avalon.html--------------Diagnostic code P1330?http://technoanswers.blogspot.in/2012/02/diagnostic-code-p1330-on-kia-2wd.html------------Diagnostic code P0700, P1330, P1121?http://technoanswers.blogspot.in/2012/02/diagnostic-code-p0700-p1330-p1121-on.html-------------shows error code P1330?http://technoanswers.blogspot.in/2012/02/2003-kia-sorento-shows-error-code-p1330.html--------OBD code P1330?http://technoanswers.blogspot.in/2012/02/obd-code-p1330-on-2003-kia-sorento.html------------OBD code P01300?http://technoanswers.blogspot.in/2012/02/obd-code-p01300-on-toyota-rav4.html--------------OBD code P0768?http://repairhelpcenter.blogspot.com/2012/01/obd-code-p0768.html------------Evaporative Emissions System codes details?http://schematicsdiagram.blogspot.com/2011/11/evaporative-emissions-system-codes.html--------------- Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

----------------

Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

--------------
ABS trouble codes for all models?

http://repairhelpcenter.blogspot.com/2011/11/abs-trouble-codes-for-all-1994-00-acura.html

------------
Diagnostic code P0010?http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-p0010.html-------------Diagnostic Code P1396?

http://howtobyme.blogspot.com/2011/11/diagnostic-code-p1396.html

--------------
Code P0452?

http://howtobyme.blogspot.com/2011/11/code-p0452.html

-------------

OBD code P0172 on Buick?

http://howtobyme.blogspot.com/2011/11/obd-code-p0172-on-buick-park-avenue.html

-------------
DTC Code P0321?

http://howtobyme.blogspot.com/2011/11/dtc-code-p0321-on-buick-park-avenue.html

------------------

Error Code P0471?

http://howtobyme.blogspot.com/2011/11/error-code-p0471-on-2007-dodge-ram-3500.html

-------------
P0304 Error code?

http://howtobyme.blogspot.com/2011/11/p0304-error-code-on-dodge-neon.html

-----------------

OBDII scan is receiving NO BUS CODE?

http://howtobyme.blogspot.com/2011/11/obdii-scan-is-receiving-no-bus-code.html

-----------
How to Clear OBD error Codes?

http://repairhelpcenter.blogspot.com/2011/11/how-to-clear-obd-error-codes-on-acura.html

----------------
Diagnosis and Testing Car Components?

http://vwrepairhelp.blogspot.com/2011/11/diagnosis-and-testing-car-components.html

--------------
Diagnostic Trouble Codes list?

Part 1.

http://repairhelpcenter.blogspot.com/2011/11/diagnostic-trouble-codes-list-for-acura_18.html

--------------
Diagnostic Trouble Codes list?

Part 2.------

http://repairhelpcenter.blogspot.com/2011/11/diagnostic-trouble-codes-list-for-acura.html

------------
OBD Code is cleared but check engine light will not RESET?

http://schematicsdiagram.blogspot.in/2012/02/obd-code-is-cleared-but-check-engine.html

--------------
Diagnostic Code 43 and 71?

http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-43-and-71-on-1991.html

------------------
Code P0132?

http://schematicsdiagram.blogspot.com/2011/12/code-p0132-on-acura-tl.html

-------------
P0031 code?

http://schematicsdiagram.blogspot.com/2011/12/p0031-code-on-dodge-dakota.html

--------------
How to get diagnostic Code without OBD Scanner on Pre 1995 cars?

http://schematicsdiagram.blogspot.com/2011/12/how-to-get-diagnostic-code-without-obd.html

------------
OBD-II Trouble Code P0300?

http://schematicsdiagram.blogspot.com/2011/12/obd-ii-trouble-code-p0300.html

-------------
Getting diagnostic code P0016?

http://schematicsdiagram.blogspot.com/2011/12/getting-diagnostic-code-p0016.html

--------------
How to Read Codes from Check Engine Light?

http://schematicsdiagram.blogspot.com/2011/12/how-to-read-codes-from-check-engine.html

-------------
Diagnostic Code P0540 continues to return and the MIL light is on?

http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-p0540-continue-to.html

-----------
DTC Trouble Code P0401?

http://schematicsdiagram.blogspot.com/2012/01/dtc-trouble-code-p0401.html

-----------------
Car misfires and error code P0306 and P0303 is shown?

http://technoanswers.blogspot.com/2012/01/car-misfires-and-error-code-p0306-and.html

-------------
Diagnostic code P0463?

http://technoanswers.blogspot.com/2012/01/diagnostic-code-p0463-on-ford-f250.html

-------------
Check engine light with codes P2195 and P2197?

http://howtobyme.blogspot.in/2012/01/check-engine-light-with-codes-p2195-and.html

------------
Diagnostic error code P0121,P0505,P1000,P2101,P2104, P2110,P2135,P2106?

http://technoanswers.blogspot.in/2012/01/diagnostic-error-code.html

--------------
P0174, P0037 and P2197?

http://technoanswers.blogspot.in/2012/02/p0174-p0037-and-p2197-on-toyota-rav4.html

-----------
P0352 Obd code?

http://technoanswers.blogspot.in/2012/02/p0352-obd-code-on-toyota-rav4.html

-------------
Error code p0402?

http://technoanswers.blogspot.in/2012/02/error-code-p0402-on-ford-escape.html

---------
Obd Code P0763?

http://technoanswers.blogspot.in/2012/02/obd-code-p0763-on-lexus.html

-------
OBD code P0301, P0430 and P0174?

http://schematicsdiagram.blogspot.in/2012/02/obd-code-p0301p0430-and-p0174.html

---------
OBD code P0500?http://schematicsdiagram.blogspot.in/2012/02/obd-code-p0500-on-lexus-rx-300.html
-----------This will help.Thanks.

For OBD code problems check the list of help links below. Click the link below to go through its procedure.--------------Diagnostic Code P2195?http://schematicsdiagram.blogspot.in/2012/02/diagnostic-code-p2195-on-toyota-avalon.html--------------Diagnostic code P1330?http://technoanswers.blogspot.in/2012/02/diagnostic-code-p1330-on-kia-2wd.html------------Diagnostic code P0700, P1330, P1121?http://technoanswers.blogspot.in/2012/02/diagnostic-code-p0700-p1330-p1121-on.html-------------shows error code P1330?http://technoanswers.blogspot.in/2012/02/2003-kia-sorento-shows-error-code-p1330.html--------OBD code P1330?http://technoanswers.blogspot.in/2012/02/obd-code-p1330-on-2003-kia-sorento.html------------OBD code P01300?http://technoanswers.blogspot.in/2012/02/obd-code-p01300-on-toyota-rav4.html--------------OBD code P0768?http://repairhelpcenter.blogspot.com/2012/01/obd-code-p0768.html------------Evaporative Emissions System codes details?http://schematicsdiagram.blogspot.com/2011/11/evaporative-emissions-system-codes.html--------------- Engine Misfire codes?

http://schematicsdiagram.blogspot.com/2011/12/engine-misfire-codes-on-chevrolet.html

----------------

Misfire on cylinder 4?

http://schematicsdiagram.blogspot.com/2011/12/misfire-on-cylinder-4.html

--------------
ABS trouble codes for all models?

http://repairhelpcenter.blogspot.com/2011/11/abs-trouble-codes-for-all-1994-00-acura.html

------------
Diagnostic code P0010?http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-p0010.html-------------Diagnostic Code P1396?

http://howtobyme.blogspot.com/2011/11/diagnostic-code-p1396.html

--------------
Code P0452?

http://howtobyme.blogspot.com/2011/11/code-p0452.html

-------------

OBD code P0172 on Buick?

http://howtobyme.blogspot.com/2011/11/obd-code-p0172-on-buick-park-avenue.html

-------------
DTC Code P0321?

http://howtobyme.blogspot.com/2011/11/dtc-code-p0321-on-buick-park-avenue.html

------------------

Error Code P0471?

http://howtobyme.blogspot.com/2011/11/error-code-p0471-on-2007-dodge-ram-3500.html

-------------
P0304 Error code?

http://howtobyme.blogspot.com/2011/11/p0304-error-code-on-dodge-neon.html

-----------------

OBDII scan is receiving NO BUS CODE?

http://howtobyme.blogspot.com/2011/11/obdii-scan-is-receiving-no-bus-code.html

-----------
How to Clear OBD error Codes?

http://repairhelpcenter.blogspot.com/2011/11/how-to-clear-obd-error-codes-on-acura.html

----------------
Diagnosis and Testing Car Components?

http://vwrepairhelp.blogspot.com/2011/11/diagnosis-and-testing-car-components.html

--------------
Diagnostic Trouble Codes list?

Part 1.

http://repairhelpcenter.blogspot.com/2011/11/diagnostic-trouble-codes-list-for-acura_18.html

--------------
Diagnostic Trouble Codes list?

Part 2.------

http://repairhelpcenter.blogspot.com/2011/11/diagnostic-trouble-codes-list-for-acura.html

------------
OBD Code is cleared but check engine light will not RESET?

http://schematicsdiagram.blogspot.in/2012/02/obd-code-is-cleared-but-check-engine.html

--------------
Diagnostic Code 43 and 71?

http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-43-and-71-on-1991.html

------------------
Code P0132?

http://schematicsdiagram.blogspot.com/2011/12/code-p0132-on-acura-tl.html

-------------
P0031 code?

http://schematicsdiagram.blogspot.com/2011/12/p0031-code-on-dodge-dakota.html

--------------
How to get diagnostic Code without OBD Scanner on Pre 1995 cars?

http://schematicsdiagram.blogspot.com/2011/12/how-to-get-diagnostic-code-without-obd.html

------------
OBD-II Trouble Code P0300?

http://schematicsdiagram.blogspot.com/2011/12/obd-ii-trouble-code-p0300.html

-------------
Getting diagnostic code P0016?

http://schematicsdiagram.blogspot.com/2011/12/getting-diagnostic-code-p0016.html

--------------
How to Read Codes from Check Engine Light?

http://schematicsdiagram.blogspot.com/2011/12/how-to-read-codes-from-check-engine.html

-------------
Diagnostic Code P0540 continues to return and the MIL light is on?

http://schematicsdiagram.blogspot.com/2011/12/diagnostic-code-p0540-continue-to.html

-----------
DTC Trouble Code P0401?

http://schematicsdiagram.blogspot.com/2012/01/dtc-trouble-code-p0401.html

-----------------
Car misfires and error code P0306 and P0303 is shown?

http://technoanswers.blogspot.com/2012/01/car-misfires-and-error-code-p0306-and.html

-------------
Diagnostic code P0463?

http://technoanswers.blogspot.com/2012/01/diagnostic-code-p0463-on-ford-f250.html

-------------
Check engine light with codes P2195 and P2197?

http://howtobyme.blogspot.in/2012/01/check-engine-light-with-codes-p2195-and.html

------------
Diagnostic error code P0121,P0505,P1000,P2101,P2104, P2110,P2135,P2106?

http://technoanswers.blogspot.in/2012/01/diagnostic-error-code.html

--------------
P0174, P0037 and P2197?

http://technoanswers.blogspot.in/2012/02/p0174-p0037-and-p2197-on-toyota-rav4.html

-----------
P0352 Obd code?

http://technoanswers.blogspot.in/2012/02/p0352-obd-code-on-toyota-rav4.html

-------------
Error code p0402?

http://technoanswers.blogspot.in/2012/02/error-code-p0402-on-ford-escape.html

---------
Obd Code P0763?

http://technoanswers.blogspot.in/2012/02/obd-code-p0763-on-lexus.html

-------
OBD code P0301, P0430 and P0174?

http://schematicsdiagram.blogspot.in/2012/02/obd-code-p0301p0430-and-p0174.html

---------
OBD code P0500?http://schematicsdiagram.blogspot.in/2012/02/obd-code-p0500-on-lexus-rx-300.html
-----------This will help.Thanks.

Hi,
Firstly you need to have the Crank Angle Sensor checked on and off vehicle. The beast why to do this is to use a Consult handheld diagnostic tool which will check the component and the wiring circuit also. Then check to see if the other fault code is still there. In most case's the H2O sensor are just indicating that there is a emission problem which could be something leading to a vacuum leak.
Let me know if you need more information.
Thanks
Jason

P0031 is H02S heater control circuit Low ( bank #1 sensor #1). Good Luck and have a good XMASS.

I suggest making use of Autozone's(or similar part stores) free engine light diagnosis. They can print you off a receipt with the codes as well as most likely causes and solutions. This will give you a great start in fixing the issue(s) with your vehicle.

Follow this link http://www.wjjeeps.com/faultcodes.htm Good Luck!

Hi,
See if this link helps:

http://www.engine-light-help.com/generic-check-engine-light-codes.html

Good luck!

What does that mean? A P0031 DTC (diagnostic trouble code) refers to the O2 sensor (oxygen sensor) located on Bank 1 in front of the catalytic converter. There is also an oxygen sensor behind the converter which is Sensor #2.
This O2 sensor #1 may also be refered to as an air/fuel ratio sensor since on some vehicles it is. It detects the amount of oxygen in the exhaust gas compared to the outside air and then vehicle's computer adjusts the air/fuel ratio going into the engine. The sensor is less effective when the exhaust gas temperature is low, so it includes a heater which is activated to help get better readings from the A/F O2 sensor. Essentially this P0031 code means that the resistance of the heater circuit is lower than normal. In most cases, that resistance level must fall below 0.8 A to trigger the DTC code.
Note, this code is very similar in nature to P0032, P0051, and P0052

Potential Symptoms Most likely you'll not notice any symptoms other than the MIL (malfunction indicator lamp, a.k.a. the check engine light) will illuminate.
Causes A P0031 DTC trouble code may be caused by one or more of the following:

• A short or open in the heater circuit in the sensor
• A failed O2 sensor heater
• Wiring/connectors broken/frayed leading to sensor and/or relay
• Failed PCM/ECM

Possible Solutions Need an O2 Sensor? Visit our O2 Sensor shopping area for the lowest price on your replacement sensor!
To fix a P0031 DTC code, you'll need to do a proper diagnosis. To do that, you'll want to inspect the wiring and connectors leading to the sensor. Also if equipped with a heater relay and fuse, you'll want to check those as well. Use a digital volt ohm meter to:

• check for 12 volts at the heater circuit feed (hint: unplug the sensor and check at the wiring connector to do this measurement)
• check the ground circuit for continuity
• measure the resistance of the heater circuit (done on the sensor itself)
• measure the resistance and voltage of the wiring

Refer to a service manual for the correct specifications (volts, ohms) for your vehicle. On some Toyota vehicles this code is triggered when the resistance of the heater circuit is below 0.8 A.
With that said, a common fix for this DTC is to replace the air/fuel (O2 oxygen) sensor #1 on bank 1.
Please keep in mind that OEM (original equipment) replacement sensors are recommended (from the dealer). Aftermarket sensors can be less reliable and of poorer quality (not always, but more often). There's also a chance that replacement parts for the P0031 code may also fall under a federal emissions warranty (check with your dealer to see if it's covered).