Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161208-99848-zogoy9js:136:3912)
    at m.mountComponent (/tmp/execjs20161208-99848-zogoy9js:47:15602)
    at /tmp/execjs20161208-99848-zogoy9js:49:31860
    at a.r.perform (/tmp/execjs20161208-99848-zogoy9js:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161208-99848-zogoy9js:49:31821)
    at r (/tmp/execjs20161208-99848-zogoy9js:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161208-99848-zogoy9js:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161208-99848-zogoy9js:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161208-99848-zogoy9js:173:8), <anonymous>:17:3)
    at /tmp/execjs20161208-99848-zogoy9js:173:8

P0864 OBD-II Trouble Code: Traction Control Module (TCM) Communication Circuit Range/Performance

diagnostic check engine light

P0864 code definition

The P0864 code is a generic powertrain code related to transmission problems, including sensor failures and pressure faults. In this case, the engine control module (ECM) has detected a fault with the traction control module, specifically related to the communication circuit.

Codes related to the P0864 include:

What the P0864 code means

The P0864 code only applies to vehicles with an electronic traction control system.

Due to the large number of modules utilized, current vehicle’s with a communication area network (CAN) utilize a communication bus to help the ECM share input and output information with the various modules.

When the vehicle’s ECM has failed to receive input or the correct signals from the traction control module, a P0864 code may be stored. The traction control module communication circuit sends information to the ECM, as well as other related controllers, to help determine proper engine RPM and timing, fuel delivery, and more.

What causes the P0864 code?

Several problems may cause a P0864 code including:

What are the symptoms of the P0864 code?

Symptoms of a P0864 code may include:

  • Check engine or warning light may illuminate
  • Traction control light may flash or stay illuminated
  • Decrease in fuel economy
  • Transmission may shift harshly
  • Transmission may not shift at all
  • Transmission may go into “limp” mode
  • Some lack traction may be felt in more slippery road conditions
  • Traction control may fail

How does a mechanic diagnose the P0864 code?

A mechanic may use several methods to diagnose a P0864 trouble code, including:

  • Utilize an OBD-II scanner to check for a stored P0864 trouble code
  • Visually inspect all wiring and connectors for signs of damage or corrosion
  • Ensure the traction control module is inactive on the network, and check if any other modules are also inactive
  • If multiple modules are offline, the error is related to the CAN bus
  • Utilize a specialized scanner (such as an Autohex) to help pinpoint the location of the error
  • Use a memory saving device to ensure controllers do not lose their memory during reprogramming
  • Test for power and ground and at the traction control module
  • Check the traction control module data communication line

Common mistakes when diagnosing the P0864 code

The traction control module may be incorrectly replaced when the root of the problem is a damaged or defective switch or poor electrical connection. It is recommended to visually inspect and fully diagnose all possible causes for a P0864 code prior to replacing the traction control module.

How serious is the P0864 code?

Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P0864 code, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.

What repairs can fix the P0864 code?

Several repairs can fix a P0864 trouble code and include:

Additional comments for consideration regarding the P0864 code

Due to the amount of electrical componentry and circuitry related to the transmission control module communication circuit, it is recommended to seek the assistance from a professional. Use of a specialized scanner can help pinpoint the location more easily.

Need help with a P0864 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 Long Does a Throttle Return Spring Last?
Not all vehicles on the road feature an electronic throttle control (ETC), which is also called drive-by-wire. For vehicles that don't offer this system, they have a throttle cable instead that...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...


Related questions

Q: The Check Engine Light is on but the scanner shows no codes.

The brand, type, quality, and manufacturer coverage of the scanner you bought will dictate how they read the codes. Unfortunately, not all scan tools are created equal. When it comes to hybrid vehicles, you may want to make sure you...

Q: OBD-II scanner read code P0108

Hello. The MAP sensor reading on a scanner should read about 1.0 to 1.5 volts at idle and 4.5 to 4.8 volts at wide open throttle. The MAP should read 4.8 volts or more when you have the key on...

Q: I have a 2009 VW Jetta S 2.5L. Why does my car turns on but then it turns off after driving it for a bit/while?

These are the following definitions for the codes you've received: P0864 - Transmission control module (TCM) communication circuit -range/performance problem P0070 - Ambient Air Temperature Sensor - (possibly shorted but most likely not related) P0734 - Gear 4 Incorrect...