Skip the auto shop - Our mechanics make house calls

The Most Common Error Codes for Transmission Problems

Transmission Error Codes Ovu0ng / Shutterstock.com

If your Check Engine Light has come on, there are a number of conditions that could be causing it. Many are related to the transmission. Your mechanic can perform a computer analysis that will reveal the problems that can be causing the Check Engine Light to come on in the form of alphanumeric codes known as P codes. The following are among the most common P codes:

P0218: Transmission over temperature condition

Your transmission is overheating. Some vehicles have a dash light that will say “trans over temp,” but not all vehicles have this feature. This code could mean that the fluid sensor needs to be replaced, but it could also be something far more complex, especially if accompanied by other P codes.

P0613: TCM processor

You don’t have to worry much about this code – it’s just telling you that there’s an internal error in the transmission control module (TCM). It’s a programming issue. You can take your car to the dealer and have the TCM replaced.

P0614: ECM/TCM incompatible

This is another purely informational code, telling you that the ECM and the TCM aren’t on speaking terms. If you have this code, chances are that one or the other has been recently replaced, and if you installed a used part, it’s not configured to work with the newer part. On newer vehicles, these parts are programmed to work with just one specific vehicle, and can’t be programmed to work with another.

P0700: Transmission control system malfunction

Again, this is an informational code. With most vehicles, the TCM is the only computer that can turn on the check engine light. If there’s a problem preventing the light from coming on, you’ll see this code.

P0706: Transmission range sensor circuit range/performance

The transmission range sensor tells the TCM the position of the gear lever. It also contains a neutral safety switch, which ensures that you can only start your car in neutral or park. This code could indicate corrosion or other problems in the transmission range sensor.

P0715: Input/turbine speed sensor circuit malfunction

Your automatic transmission uses input and output speed sensors to determine whether your transmission is in the gear that the transmission control module (TCM) wants it to be in. If you see this code, it means that the TCM isn’t correctly calculating the shift pattern. You’ll usually find that the transmission goes into “limp” mode if this happens. A corroded connector or a problem with the wiring could be the problem, and the usual solution is to replace the input speed sensor.

P0720: Output speed sensor circuit malfunction

The speed sensors tell you how fast your output or input shaft is moving. If the TCM can’t read this information, your speedometer won’t read accurately. The output speed sensor may need to be replaced.

P0729-P0736

These codes all report problems with the gear ratio. The only difference in these transmission trouble codes is the gear that’s being identified. They’re all reporting the same error, but they’re reporting it for different gears. The TCM’s input and output sensors measure the speed of the input and output shafts, and if they’re not moving at the right speed, you’ll get these transmission trouble codes. Most of the time the problem is as simple as low transmission fluid, although it could also indicate problems with the torque converter clutch or a shift solenoid if combined with other P codes.

The torque converter turns the engine’s rotational speed into a twisting force to propel your vehicle, and delivers additional gear ratio when driving at highway speeds. A solenoid regulates the torque converter clutch, and if you see this P code it could mean that the solenoid is corroded or otherwise damaged. If that’s not the case, then it could be a problem in the wiring around the solenoid.

P0750-P0770

These codes all relate to shift solenoid failure. Your TCM tells your transmission how and when to shift by opening one of these solenoids to allow transmission fluid to pass into the transmission’s hydraulic control section for the specific gear. If one shift solenoid malfunctions, the gear that it’s intended to control won’t work properly, if it even works at all. You’ll usually see other P codes along with these.

These are the most common transmission trouble codes. Once your mechanic has completed the computer diagnostics for transmission problems, he or she can advise you as to what repairs are needed.

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

More related articles

How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...


Related questions

Q: The transmission will not shift out of 1st gear. The engine code reads TCM malfuction & P2714 Control solenoid stuck

Chevrolet released a Technical Service Bulletin about this issue in 2013. TSB Number:PI-1131. It suggests code P2714 may be caused by a stuck or non-functioning pressure control solenoid. If you've eliminated that as the cause and replaced the TCM, then...

Q: Shifting too slow p0106

Hello. This is actually a common issue on this car. I usually start by making sure that all of the intake tubes are installed tight and correctly and that there are not any leaking vacuum lines. If those are all...

Q: What does "Service Stabili Trak mean?"

The fault(s) that have caused the check engine light to illuminate should be investigated and resolved first because occasionally resolving those also removes the cause for the Stabilitrak warning light light. The recommended service is a check engine light diagnostic....