How To Solve Transmission Control System Mil Request?

The MIL request circuit/open transmission control system can take place for different causes, and for this code will be initiated on the dash, the mechanic has to diagnose the particular cause. An automatic transmission control system malfunction lamp or MIL demonstrates that if the P0802 code is stored in the database, then it is not working correctly.

In rare situations, though, the control system could have been illuminated by a huge malfunction. Since this code can produce a non-illuminated Check Engine Light, it may mean that other stored codes will not be examined and addressed. Learn how to solve transmission control system mil request in this article.

Causes For Transmission MIL Request

For transmission control system mil request, a very generic code, the P0700 or any related OBD2 code, should be taken carefully. It shows that the transmission monitoring system has detected a malfunction and prevents your automobile from correctly shifting the ratios, putting you and others on the road at risk.

If malfunctions are discovered in your transmission controls, the MIL will be flashed by the TCU. Most advanced automobiles feature a specific control module called the transmission control module or TCM for the automatic transition system. You have to delve a bit deeper to locate the specific root of the problem.

How To Solve Transmission Control System MIL Request?

If a malfunction in the transmission system is detected by a PCM, P0700 is set. This failure leads the car to adjust the control engine light and to start a secure mode. Once the failsafe mode has been set, the problem will persist until normal operation is detected or restored. Here are the ways to solve it-

1. Scan For Codes

First hooks up a scan tool and inspects all existing codes. It’s usually not alone if P0700 is found. To see under what circumstances checking engine light has been triggered, check for all freeze frame data for all the codes. Then clears the code and uses a driving test for the car to reproduce the problem.

Once done, the transmission and all cable harnesses of the transmission will be visually inspected. Finally, the scanning tool is used to monitor transmission information during the drive, like the operation of the solenoid and the state of the valve body.

2. If Low Fluid Is The Cause

The main reason for transmission control system mil request. One or more shift solenoid codes are typically observed as P0700. The transmission leaks or a failure on the extreme side of the spectrum may result in this being as simple as a low fluid. It is not unusual to witness metal flashes in the fluid when a transmission fails.

The flowers block the shift of solenoids and valve bodies, which might lead to the code P0700. The mechanical wear might cause excessive metal accumulation in the transmission and indicate the necessity to reconstruct or replace the transmission.

3. Failing Shift Solenoid

Unpredictable gear shifts are one or more of the most prevalent signals of a failure of your transmission solenoids. You might suddenly see your automobile jumping to another gear as you drive at a fixed speed. It often takes 2-4 hours to replace the transmission solenoid, giving you an estimate of how much labor costs will be incurred.

Alternatively, you can try to clean them too, sometimes the old fluid is stuck in them and causes them to malfunction. Repacing shift solenoid is not a complex job but takes time.

4. Bad Transmission Valve Body

The principal signs of a poor body of a valve are: When pressure is applied to the brakes, hear slamming or knocking noises. The car slows down while the car is in reverse or reverse mode. When changing the gears, the shifting stick slips constantly. Over time, your entire gearbox could become a huge issue with a small problem with your transmission valve body.

When you have a faulty transmission valve body, you will put great stress on your transmission. Rebuilding transmission is less expensive if not done at the plant level. You can also get used valve body fairly easily. 

How To Prevent Transmission Problems?

When you begin to see something unusual with your car, it is time to start thinking about the problem and to find a solution to remedy it. It’s excellent that you can sort your problem without any problem, but even better not first of all to have a problem. Around 1,600 kilometers, your liquid should be checked.

The liquid should also be changed every 80,000 km or every other year, whichever is the first one. Fluid types vary between vehicles. Some additional new fluids may be more costly, but they will probably increase the transmission protection, which is worth the cost.

Can You Drive With An Active Transmission MIL?

A brief reply: no! You should not do anything other than go for a little jaunt to your neighborhood technician if you fear you have a defective transmission. It’s just a matter of time before your vehicle can practically drive anyplace if you have a broken transmission.

It won’t transfer the rotation of the engine to the wheels of your car when you fail the transmission. Your engine will essentially rotate, but your wheels will not. Reconstruction of a transfer can save you plenty of money in the short run and keep auto payments out of your monthly budget.

Cost Of Fixing Transmission Faults

Average repairs may cost approximately $900, ranging between $300 to $1,500 depending on which type of repair is required. For example, new transmission clutches will cost roughly $1,150 and will cost between $800 and $1,500 on average. Reconstruction of a transfer can save you plenty of money. In the short-run and keep auto payments within your monthly budget.


Solving the transmission control system mil request is not that of a great deal, however, the repairs can be very expensive. So in order to avoid it, you should periodically change your transmission fluid and car not to overheat it. This practice will keep your transmission healthy.  Comment down below for any further questions.

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