Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-103658-1ihcxznjs:136:3912)
    at m.mountComponent (/tmp/execjs20161208-103658-1ihcxznjs:47:15602)
    at /tmp/execjs20161208-103658-1ihcxznjs:49:31860
    at a.r.perform (/tmp/execjs20161208-103658-1ihcxznjs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-103658-1ihcxznjs:49:31821)
    at r (/tmp/execjs20161208-103658-1ihcxznjs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-103658-1ihcxznjs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-103658-1ihcxznjs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-103658-1ihcxznjs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-103658-1ihcxznjs:173:8

B1250 OBD-II Trouble Code: Air Temperature Internal Sensor Circuit Failure

diagnostic check engine light

B1250 code definition

The B1250 trouble code detects an error with the air temperature internal sensor.

What the B1250 code means

The B1250 code is a generic OBD-II trouble code that notes a circuit failure with the air temperature internal sensor. The air temperature internal sensor records the temperature in the interior of the vehicle, and relays the information to the climate control module. This allows the climate control module to accurately control the automatic climate control system. When the climate control module notes a malfunction in the air temperature internal sensor circuit, or fails to receive a reading from the sensor, then the B1250 trouble code will be stored.

What causes the B1250 code?

The B1250 trouble code is usually caused by:

What are the symptoms of the B1250 code?

The B1250 trouble code will usually be accompanied by an illuminated check engine soon Warning Light on the vehicle’s instrument panel. It is also likely that the automatic climate control system will not work.

How does a mechanic diagnose the B1250 code?

The B1250 code will be diagnosed with the help of an OBD-II trouble code scanner. A reputable technician can use the scanner to view the freeze frame data and assess the code. The scanner will also be used to check for the presence of any other trouble codes that have been detected. If the mechanic finds that there are multiple trouble codes present, then they will need to be inspected and repaired in the order in which they occur on the scanner. The technician will then need to reset the trouble codes, restart the vehicle, and look to see if the code still remains detected. If not, then a faulty trigger, or an intermittent error should be suspected.

If the B1250 trouble code remains detected, then the mechanic should begin with a visual inspection of all of the electrical components. Blown fuses, corroded connectors, and shorted wires will need to be replaced. If the technician notices that the damage is caused by something, such as an oil leakage, then a more thorough inspection will need to take place, as there may be a more critical component failure that needs to be addressed. If all of the electrical components are in working order, then a defective air temperature internal sensor should be suspected.

After any replacements are made, the mechanic will need to again reset the codes, restart the vehicle, and check for the presence of the B1250 code. This will help the technician be alerted as soon as the issue is resolved.

Common mistakes when diagnosing the B1250 code

The most frequently made error when diagnosing this code comes from not complying with the OBD-II trouble code diagnosis protocol. The protocol should be followed step by step at all times, as this ensures a thorough diagnosis, and no erroneous repairs.

Functional air temperature internal sensors are frequently and unnecessarily replaced, when the only issue is a damaged wire, connector, or fuse.

How serious is the B1250 code?

The B1250 trouble code will not keep a vehicle from being drivable, though it may keep the automatic climate control system from working. As with all trouble codes, it’s a good idea to have the vehicle inspected and repaired as soon as the code is detected.

What repairs can fix the B1250 code?

Repairs for the B1250 trouble code include:

Additional comments for consideration regarding the B1250 code

It is very rare for the B1250 code to signal a control module failure, so all possible causes should be thoroughly inspected before the PCM, climate control module, or body control module is condemned. If a control module is replaced, it will need to be reprogrammed.

Need help with a B1250 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...


Related questions

Q: No throttle response on 2012 dodge avenger

In the future, please include the motor size. Thanks. Your electronic throttle system consists of the throttle pedal assembly with an accelerator pedal position sensor, the throttle body which consist of a TPS (Throttle Position Sensor), throttle plate actuator,...

Q: Obd plug in on my 1995 won't read any on my Obd meter

OBD-II came out in late 1995 in some vehicles, and all vehicles from 1996 onwards. You may need to try an OBD-1 scan tool or try to obtain the codes another way. It is also possible that you have some...

Q: Flashing green light next to "D" and check engine light on.

For this particular issue, I would start by checking the continuity of the cruise control switch buttons. You will need to check these with a volt meter to determine if they are getting power. If you need assistance with getting...