Skip the auto shop - Our mechanics make house calls

P0700 OBD-II Trouble Code: Transmission Control System Malfunction

Check Engine Light

P0700 code definition

P0700 is a generic OBD-II code that is indicating a fault within the transmission control system. This code may be seen with shift solenoid codes or other transmission codes.

What the P0700 code means

P0700 is set when the PCM detects a malfunction in the transmission control system. This malfunction causes the vehicle to set a Check Engine Light and trigger a failsafe mode. Once the failsafe mode is set it will remain until the fault is repaired or normal operation is detected.

What causes the P0700 code?

  • Faulty transmission control module
  • Transmission valve body fault
  • Shift solenoid issues
  • Open or short in the wiring harness

What are the symptoms of the P0700 code?

  • Check Engine Light displayed on the dashboard
  • Poor gas mileage
  • Transmission shifting problems
  • Engine stalling, running poorly, or dying

How does a mechanic diagnose the P0700 code?

  • A mechanic will begin by hooking up a scan tool to the vehicle and checking for all codes present. If P0700 is found, it is generally not alone.

  • Check all the freeze frame data for all codes to see under what circumstances the Check Engine Light was set.

  • Next, the technician will clear the code and take the vehicle for a road test to duplicate the concern.

  • Once this is performed, a visual inspection will be performed of the transmission and all wiring harnesses of the transmission.

  • Lastly, the scan tool will be used to monitor transmission information while driving, such as solenoid operation and the condition of the valve body.

Common mistakes when diagnosing the P0700 code

Mistakes are made when all steps are not followed or are not completed at all. Though a car may have a typical repair that fixes the P0700 code, this may not be true in all circumstances, which is why diagnosis is performed step-by-step.

How serious is the P0700 code?

P0700 can potentially indicate larger issues with the transmission or the future of the transmission. Some serious drivability problems can come along with this code and care should be taken.

The vehicle should not be driven if it is having trouble changing gears or it is stuck in one gear as this will cause further damage and is a safety hazard on the road.

What repairs can fix the P0700 code?

Additional comments for consideration regarding the P0700 code

P0700 is commonly seen with one or more shift solenoid codes. This may be as simple as low fluid due to a transmission leak, or a failure of the transmission on the extreme side of the spectrum.

When a transmission is failing, it is not uncommon to see metal flakes in in the fluid. These flakes clog shift solenoids and the valve bodies and can result in the P0700 code. When excessive metal buildup is found in the transmission, it is due to mechanical wear and can be an indication the transmission needs rebuilt or replaced.

Need help with a P0700 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

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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.


Post a question and get free advice from our certified mechanics.


More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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,...

Related questions

Q: Multiple error codes.

Those codes are mostly for the transmission control module. I would have a technician come out and test fuses and check voltages and look for a shorted wire. It will probably be a 20 amp fuse for the ECM. If...

Q: VSC Off, VSC Trac and check engine lights on

It sounds like you may have a vacuum leak somewhere that is causing the EVAP system to have a leak, therefore affecting power to some of the traction control parts. Traction control systems can often use vacuum assisted parts to...

Q: Getting Red Lighting Bolt Warning Light and Check Engine Light

Hi there. Assuming the Check Engine Light and red lightning bolt were on before your vehicle experienced the no start condition. This would indicate a malfunction in the electronic throttle control system. The computer has recognized the fault and stored...