In a car with an automatic transmission, the transmission range (TR) sensor tells the transmission control module (TCM) whether the gear selector is in Park, Reverse, Neutral, Drive, or Low (PRNDL). When the signal from the TR signal is not what the TCM expects, code P0706 is set.
Diagnostic trouble code (DTC) P0706 stands for “Transmission Range Sensor “A” Circuit Range/Performance.” It warns that the PCM detects an incorrect signal from the TR sensor.
The transmission control module(TCM) regulates the transmission, much like how the engine control module (ECM) runs the engine and its related systems.
The ECM will only allow the engine to start with the transmission at park or neutral transmission. To find out the position of the gear shifter, it consults with the transmission range sensor.
Also called the neutral safety switch or the PRNDL input switch, this sensor sits right next to the transmission’s manual valve. It checks the position of the gear shifter and sends voltage signals to the control modules that correspond to the transmission positions.
A code P0706 may allow the engine to start outside of neutral or park. The PCM may also force the vehicle into a safe mode.
If you’re planning to troubleshoot code P0706 yourself, you can read our technical discussion about how transmission range sensors work for more useful information.
Note: The Society of Automotive Engineers (SAE) set the generic code P0706. The vehicle’s manufacturer may have programmed a different definition for this code. Check the appropriate repair manual.
These include:
When your car experiences a problem that triggers the P0706 code, it may cause the following warning signs:
Some instances may involve issues with the engine’s performance. On rare occasions, the driver may not notice any conditions associated with the P0706 code.
Car owners with sufficient knowledge and experience in DIY auto repair can attempt to determine what caused the P0706 code. The following video can give you an idea of what the diagnostic process might involve:
The P0706 code is a generic trouble code that could apply to different makes and models. The symptoms experienced by vehicles from different manufacturers may be similar, but the steps for fixing a P0706 code in a Chrysler may not be the same for fixing one in a Honda.
You can leave the fixing to your mechanic or you can do it yourself if you have the necessary tools and automotive DIY skills. If you decide to try the fix yourself, it will be helpful to refer to your repair manual or get factory vehicle repair information from an online subscription service.
Don’t let your vehicle hang out in the garage for days because of the issues caused by the P0706 code. If you need to replace any of the transmission parts mentioned above, don’t put off shopping for the component you need. Whatever you’re in the market for to clear this trouble code, you’ll find it without any hassle at CarParts.com.
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