THE MOST COMMON TRANSMISSION RELATED ENGINE CODES
"The meaning behind the most frequently seen Transmission-related Engine Error Codes”
If your transmission is experiencing issues, your engine's computer system may attempt to report the unexpected behavior to you through your Check Engine Light. This doesn't mean your vehicle is going to breakdown immediately, but it does mean that something is happening under the hood that your vehicle believes you need to be aware of. It is very important that you visit your local repair shop after your Check Engine Light comes on in order to catch maintenance issues and concerns before they develop into engine failure and expensive repairs in the future. We will scan your engine for free and discuss our findings with you. Call us today at (503) 656-6825 to arrange for your Complimentary Engine Code Scan.
Engine Code 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.
Engine Code 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.
Engine Code 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.
Engine Code 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.
Engine 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.
Engine Code 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.
Engine Code 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.
Engine Code 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.
Engine Code 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.