Skip the auto shop - Our mechanics make house calls

P0706 OBD-II Trouble Code: Transmission Range Sensor Circuit Range/Performance

Check Engine Light

P0706 Code Definition

The P0706 code is a generic powertrain code related to the transmission. This code is non-emission related. The transmission range sensor circuit is not communicating correct data to the engine control module (ECM). This code only applies to vehicles with an automatic transmission.

Codes related to the P0706 include:

  • P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input)
  • P0707: Transmission Range Sensor Circuit Low Input
  • P0708: Transmission Range Sensor Circuit High Input
  • P0709: Transmission Range Sensor Circuit Intermittent
  • P0814: Transmission Range Display Circuit
  • P0819: Up and Down Shift Switch to Transmission Range Correlation

What the P0706 Code Means

A transmission range sensor is also called a park/neutral switch or safety switch. The sensor communicates with the vehicle's transmission control module and ECM and is attached to the manual valve of the transmission.

The transmission range switch detects whether the selector lever is in park or neutral and sends the signal to the transmission control module. This is to ensure the vehicle on starts in the park and neutral position.

When a P0706 code appears, the transmission is not receiving clear data from the transmission range sensor. This mostly occurs when the vehicle is in motion and reads that the vehicle is traveling at a speed that does not match what the ECM sees as the current shift position (such as traveling at any speed when the transmission is reporting it is still in park or neutral).

What Causes the P0706 Code?

Several problems may cause a P0706 code including:

  • Dirty or poor quality transmission fluid
  • Damaged or defective park/neutral position switch
  • Damaged or improperly adjusted park/neutral position switch
  • Damaged or defective transmission range sensor
  • Damaged, defective, or shorted wiring to the transmission range sensor
  • Damaged or defective valve body
  • Damaged or faulty manual shift valve linkage
  • Shorted or open park/neutral position switch harness
  • Bad electrical connection to the park/neutral position switch circuit
  • Damaged or defective control cable
  • Damaged or defective ECM (rare)

What are the Symptoms of the P0706 Code?

Symptoms of a P0706 code may include:

  • A Check Engine or Warning Light may illuminate
  • Poor shifting
  • Decreased acceleration
  • Inability to switch gears
  • Poor fuel efficiency
  • The vehicle may go into “limp” mode

How Does a Mechanic Diagnose the P0706 Code?

A mechanic may use several methods to diagnose a P0706 trouble code, including:

  • Utilize an OBD-II scanner to check for a stored P0706 trouble code

  • Visually inspect the range sensor and wiring harness for damage

  • Visually inspect all wires and connectors related to the transmission range sensor and ECM for damage

  • Determine if the vehicle will start while in the reverse shift position or drive shift position

  • Clear codes, test drive the vehicle to see if code reappears

  • Check for circuits continuity and resistance

Common Mistakes when Diagnosing the P0706 Code

At times, a P0706 code is the result of an engine misfire or driveline problem. Always check for any other stored codes that could be the ultimate cause of the problem before replacing parts unnecessarily.

How Serious is the P0706 Code?

Because the vehicle’s operation could suffer and the transmission may go into “limp” mode, the P0706 code is considered potentially serious, and it is recommended that you take your vehicle to your local mechanic for diagnosis and repair as soon as possible.

What Repairs can Fix the P0706 Code?

Several repairs can fix a P0706 trouble code and include:

  • If necessary, flush and fill transmission fluid
  • Repair or replace any damaged or faulty wiring or connectors
  • Check battery voltage levels
  • Repair or replace any damaged or defective circuits or connectors
  • Repair or replace damaged or defective transmission range sensors
  • Repair or replace a damaged or defective ECM (rare)
  • Clear all codes, test-drive the vehicle, and rescan to see if any codes reappear

Need Help with a P0706 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

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...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP)...


Related questions

Q: The Check Engine Light came on after washing my Durango

It sound like you got water into some of the electrical connections from the water that is sprayed sideways and from the bottom of some of these car washes. Also, your car was running, which could cause the water to...

Q: Battery light came on went and bought a new battery battery light comes on about 1 minute after starting car.

The alternator on this vehicle is computer controlled and if the alternator is not communicating to the computer then it may default to a set charging rate that will show up as good when testing using standard methods. The computer...

Q: P0706. don't want to pay Audi $2,000. or more.

Hello and thanks for contacting YourMechanic. The dealership Audi is likely trying to sell you. I am fairly your problem is not the TCM (Transmission Control Module - transmission computer). What is wrong with your transmission is the transmission range...