Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161209-86798-tph6rajs:136:3912)
    at m.mountComponent (/tmp/execjs20161209-86798-tph6rajs:47:15602)
    at /tmp/execjs20161209-86798-tph6rajs:49:31860
    at a.r.perform (/tmp/execjs20161209-86798-tph6rajs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161209-86798-tph6rajs:49:31821)
    at r (/tmp/execjs20161209-86798-tph6rajs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161209-86798-tph6rajs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161209-86798-tph6rajs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161209-86798-tph6rajs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161209-86798-tph6rajs:173:8

P2709 OBD-II Trouble Code: Shift Solenoid F Electrical

check engine light

P2709 Trouble Code Definition

A P2709 code denotes a problem in one specific shift solenoid. Automatic transmissions are computer controlled and use shift solenoids to actuate gear changes, managing the flow and transfer of fluid between hydraulic circuits and internal passages.

What a P2709 Code Means

While the conditions that trigger a code can vary from one manufacturer, year, or model to another, almost all vehicles select gear ratios based on information from throttle position, engine load, engine speed and vehicle speed. When the desired gear ratio doesn’t agree with the gear ratio detected in real time, the code will be stored and the malfunction indicator lamp (MIL) or Check Engine Light will illuminate. Sometimes, several failure cycles may be needed for the MIL to illuminate.

Common Causes for P2709 Code

A P2709 trouble code can result from:

  • Failed shift solenoid
  • Blocked hydraulic passages inside transmission
  • Mechanical internal failures in transmission
  • Dirty or contaminated fluid
  • Failed PCM
  • Failed transmission control module

Symptoms of P2709 Code

A P2709 code can display symptoms including:

A P2709 code can also be accompanied by other solenoid-related codes.

Diagnosing the P2709 Code

  • Any transmission problem diagnosis should start with an inspection of the transmission fluid dipstick, making sure the fluid level is topped off and that fluid is in good condition. If the fluid level is low, top off with manufacturer-approved fluid and run the unit long enough to determine where the leak is coming from.

  • Dirty or burned fluid is an indication that the transmission has been poorly maintained, and may have been operated with low fluid levels.

  • In case of burned-smelling fluid, drop the transmission pan and check for clutch material and other debris in the bottom of the pan. If such debris is present, the transmission will likely need a complete rebuild of hard and soft parts, a new torque converter and a fluid flush/fill in order to work properly again.

  • If debris isn’t present in the pan, look for any burned or shorted wiring and replace connectors and circuits as needed. In most cases it will be necessary to replace the entire internal wiring harness of the transmission.

  • If the system wiring and connectors appear to be OK, connect a scanner to the diagnostic port. Record trouble codes. Clear the codes and operate the vehicle to see if the code returns. If the code doesn’t return, this could indicate an intermittent condition which may be tricky to diagnose. In some cases, the condition may have to be allowed to worsen in order to make a proper diagnosis.

  • If the transmission seems to operate normally and codes don’t register again, the problem may have been due to low fluid level/pressure. If the code returns and you notice slippage with the transmission fluid level topped off, check the pump’s pressure with a manual pressure gauge.

  • Find a hydraulic pressure diagram for the vehicle and connect the gauge to the opening at the transmission housing in order to get a pump pressure reading. Compare your readings with manufacturer’s specs and make repairs as needed.

  • Low pump pressure can be due to clogged internal passages, faulty shift solenoids, faulty electronic pressure regulator or a defective pump.

  • If the transmission seems to be operating normally but the code returns immediately, suspect the shift solenoid. Check reference voltage and ground signals using a digital volt/ohmmeter. Disconnect all other related control modules before checking circuit resistance, to avoid damage to other components.

  • Replace any circuits/connectors as needed and retest system. Use the manufacturer’s wiring diagram for the shift solenoid involved, then test the solenoid and all other related circuits for resistance and continuity. Compare readings with manufacturer’s specs. Repair/replace circuitry, connectors or components that do not fall within manufacturer’s specs.

  • Retest the system afterward. If all system circuits are within spec, connect the scanner to the vehicle’s diagnostic port and see if you can manually engage the shift solenoids in question.

  • If the solenoid still won’t activate manually, replace the solenoid or solenoid pack. If the solenoid functions properly and all circuits are OK, suspect the PCM—but keep in mind that PCMs rarely fail, and replacement of the PCM will also require reprogramming.

Need help with a P2709 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

How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance Related Trouble Codes: P2158: Vehicle Speed Sensor B P2160: Vehicle Speed Sensor B Circuit Low P2161:...


Related questions

Q: Wont start sometimes

The problem may be from the fuel pump or regulator or one of the sensors. You should have a Check Engine Light that can be scanned and diagnosed to see what may be causing the problem. I recommend having a...

Q: Blinking check engine light.

Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...

Q: Blowing fuse for turn, ABS, and Hvac fan, Also will start in any gear

Hello, thanks for writing in about your Chrysler Town & Country. If it will start in any gear, then there is more than likely a fault in the neutral safety circuit. It can be as simple as the neutral safety...