Obd2 Trouble Code

P0700 OBD2 Trouble Code: Transmission Control System TCS Malfunction

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A P0700 Code is stored in the engine control module when it got a signal from the transmission control module, telling something is wrong with the transmission.

In this article, we will discuss the common symptoms, causes, and how to diagnose them properly.

P0700 Definition

Transmission Control System TCS – Malfunction

What does P0700 mean?

A P0700 Code means that the engine control unit got information that there is a trouble code stored in the transmission control module.

There could be a lot of different problems with the transmission, but the P0700 code only tells us that there are more trouble codes stored in the transmission control module (TCM)

P0700 Symptoms

There is a lot of strange symptoms you may experience when the P0700 code appears. It will most likely be problems related to your transmission.

  • Check engine light
  • Transmission control light
  • Shifting problems
  • Slipping transmission
  • Engine stalling
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How serious is the P0700 Code?

Severe – Because just the P700 code in the engine control unit tells us such little information, there might be a serious transmission problem.

It can also be the other way around – it can be a super simple problem or not a problem. But, because it can be serious, it is best not to take the risk.

Causes of the P0700 Code

The P0700 code can literally mean any problem with the transmission. To get more information, you need to read the codes from the TCM also. Here are some common problems with the transmission, though:

  • Faulty Shift Solenoids
  • Low transmission fluid level
  • Defective Valve body
  • Faulty transmission control module (TCM)
  • Broken wires between TCM and ECM
  • Broken wirings to transmission

What repairs can fix the P0700 code?

  • Replace Shift Solenoid
  • Change and refill transmission fluid.
  • Replace Valve body
  • Repair broken wires
  • Replace the transmission control module

Common P0700 Diagnostic mistakes

A widespread diagnostic mistake regarding the P0700 code is starting your troubleshooting without checking the TCM trouble codes. The engine control module stores the p0700 code because it says another code is stored in the transmission control module.

Get a scanner that can handle reading from the transmission control module and check what it says before doing anything else.

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How to diagnose the P0700 Code

  1. Connect a Diagnostic tool that has the ability to read the transmission control module. Check it for the trouble codes.
  2. The next step completely depends on what trouble code you found in the transmission control module. Find information about the given trouble code you found there.
  3. If your diagnostic tool is compatible with reading data from the transmission control module, but now it can’t communicate with the TCM at all – there is a risk that there is a problem with the wirings between the ECM and TCM. It can also be a power – ground problem, CAN-bus, or a fried TCM.

Related Trouble codes:

Estimated P0700 Repair Cost

Here are some examples of P0700 repair costs. The prices include parts and labor, but it does not include diagnosis costs.

  • Transmission shift solenoid replacement – 150$ to 300$
  • Transmission fluid replacement – 100$ to 200$
  • Valve body replacement – 300$ to 700$

Common P0700 Related Questions

What causes code P0700?

The P0700 code is stored in the engine control unit when it gets information from the transmission control module that something is wrong with the transmission. In other words, it can be any problem with the transmission.

What does P0700 mean?

The P0700 code means that there is a problem with your transmission. This can be any problem, and you need to read the codes from the transmission control module.

How to clear code P0700?

To clear the P0700 code, you need to use an OBD2 scanner. You might need an enhanced scanner to read and clear the trouble codes in the transmission control module. Remember that just clearing the code will not repair the problem.

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