Error P0700 – how to fix?

P0700 Code Definition

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

What does the code P0700 mean

P0700 is set when the PCM detects a fault in the transmission control system. This vulnerability turns on the Check Engine light and enters Safe Mode. After entering the emergency mode, it remains active until the fault is rectified or normal operation is detected.

What causes the code P0700?

• Faulty transmission control module
• Faulty gearbox valve body
• Problems with the shift coil
• Wiring harness open or shorted.

What are the symptoms of the P0700 code?

• The “Check Engine” light appears on the dashboard.
• Low fuel economy
• Problems with shifting the gearbox
• Engine stalls, misfires or shuts down

How can a mechanic diagnose the P0700 code?

• The mechanic will start by connecting a scanning tool to the vehicle and checking all the codes in it. If P0700 is found, it is usually not the only one.
• It will check all freeze frame data for all codes to see under what circumstances the engine light has been activated.
• The technician will then erase the code and take the vehicle to a road test to duplicate the problem.
• Upon completion of these steps, a visual inspection of the transmission and all transmission wiring harnesses will be performed.
• Finally, the scan tool will be used to monitor transmission information while driving, such as coil operation and valve body condition.

The most common errors when diagnosing the P0700 code

Mistakes are made when not all or all of the steps are taken. While your car may have a typical repair that will fix the P0700 code, this may not be the case in all circumstances, so diagnosis is made step by step.

How serious is the P0700 code?

• The P0700 code could potentially indicate serious problems with the transmission or the future of the transmission. This code can cause serious driving problems, so be careful.
• Do not drive your car if it has problems with shifting or is stuck in any of them, as this can cause further damage and pose a safety hazard.

What repairs can fix the problem with code P0700?

1. Transmission Control Module (TCM) Replacement
2. Repair or replace damaged wiring
3. Valve body replacement
4. Replacing the gearbox solenoid

Additional notes regarding the P0700 code

Code P0700 is often found with one or more shift coil codes. It can be as simple as a low fluid level caused by a leak in the gearbox, or a gearbox failure at the extreme end of the spectrum.

When a gearbox fails, it is not uncommon to see flakes of metal in the fluid. These petals clog the shift solenoids and valve bodies, which could result in a P0700 code. When excessive metal build-up is found in the gearbox, it is due to mechanical wear and may indicate a need to rebuild or replace the gearbox.