Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161209-86798-1h1v1kejs:136:3912)
    at m.mountComponent (/tmp/execjs20161209-86798-1h1v1kejs:47:15602)
    at /tmp/execjs20161209-86798-1h1v1kejs:49:31860
    at a.r.perform (/tmp/execjs20161209-86798-1h1v1kejs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161209-86798-1h1v1kejs:49:31821)
    at r (/tmp/execjs20161209-86798-1h1v1kejs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161209-86798-1h1v1kejs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161209-86798-1h1v1kejs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161209-86798-1h1v1kejs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161209-86798-1h1v1kejs:173:8

P2794 OBD-II Trouble Code: Gear Shift Direction Circuit Low

check engine light

P2794 code definition

If the P2794 has been stored by your vehicle, it means that the PMC has detected a problem with the gear shift direction circuit for a specific gear lever direction or position.

What the P2794 code means

The transmission gear shift direction sensor is responsible for inputting data to the PCM. There, the PCM uses it to calculate fuel delivery strategy, engine RPM, and engine timing, amongst other things. This code is only possible in vehicles that are equipped with dual clutch adaptive transmissions, manual transmissions, automated manual transmissions and automatic transmissions.

The PCM can receive an input that would cause a P2794 code from transmission shift solenoids, vehicle speed sensors, the torque converter lock-up solenoid and other types of sensors. When the PCM is signaled that the vehicle is operating in an incorrect transmission shifter range or at the wrong direction, a P2794 code is stored and a Check Engine Light comes on.

What causes the P2794 code?

There are a few reasons that your car may store a P2794 code:

  • By far, the most common reason would be that your transmission shifter components are worn or defective

  • A defective range sensor

  • Wires or electrical connectors that are corroded, shorted, opened or otherwise damaged

What are the symptoms of the P2794 code?

As the code related to a problem involving your gears, it makes sense that most of the symptoms that are most noticeable also affect this same area. For example, you can expect that shifting will be harsh or even difficult to do. In fact, you may even find it impossible to shift at all. Another problem would be reduced fuel efficiency.

How does a mechanic diagnose the P2794 code?

Your mechanic will use a gear shift direction sensor to find which gear your vehicle’s transmission is in at any given interval. Then, they’ll most likely look for any corroded, shorted, open or damaged cords, connectors or other components related to the system.

If everything is in working order, they’ll connect a scanner to the diagnostic connector and take down all stored trouble codes and freeze frame data. Then they’ll do a test drive to see if the codes return.

Should the problem persist, they’ll move on to replace any circuitry or connectors that don’t coincide with the manufacturer’s specifications.

Common mistakes when diagnosing the P2794 code

The transmission gear shift direction sensor is often replaced in error when simply adjusting it would have fixed the problem causing the code.

How serious is the P2794 code?

Put simply, your vehicle will not work correctly until the underlying problem causing the code is addressed. This doesn’t necessarily mean it’s dangerous, but if you keep driving when your gears aren’t working correctly, expect that you’ll be doing a lot of costly damage to your vehicle. The price of your reduced fuel efficiency could really add up too.

What repairs can fix the P2794 code?

To fix your vehicle, your mechanic will do one of the following:

  • Replace or repair any electrical components that have been compromised (e.g. wiring, connectors, etc.)

  • Check for corroded areas that may be affecting the gear shift

  • Test drive the vehicle and retest the system to ensure the fix was successful

Additional comments for consideration regarding the P2794 code

If you recently had your transmission repaired, there’s a chance that your range sensor wasn’t correctly readjusted, which would explain why your vehicle is now storing this code. This is important to keep in mind if the problem occurs shortly after your transmission was worked on. Another common issue to watch out for is excessive corrosion affecting the sensor connector.

Need help with a P2794 code?

If your vehicle isn’t operating correctly because of a P2794 code, YourMechanic can help. You can either call us at 1-800-701-6230 to talk with one of our service advisors or, if you prefer, let us know how we can help by filling out this form. Our mechanic can meet you at your home or place of business – whichever is most convenient – and get you back on the road in no time.

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

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem What the P0121 code means P0121 is a generic OBD-II code which indicates that the Engine Control...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
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....


Related questions

Q: How many crankshaft position sensors are on a 2011 GMC Terrain?

Usually there will only be one crankshaft position sensor. However, there is also a camshaft position sensor as well. It is more likely that there is multiple cam sensors than crank sensors. It is possible for engines to have anywhere...

Q: 2 major issues

The code P0453 is for the purge control valve; it's most likely bad and needs to be replaced. The ticking noise is possibly the oil pressure dropping too low at idle and the camshaft followers are getting noisy. Have the...

Q: i need to know the key sequence to get the check engine codes

Hello. The old style of retrieving codes was indeed done by turning the key on and off again. However vehiles manufactured after 1996 are equipped with OBD-II diagnostic systems. This means the driver or technician can acess and even control...