P0715 = Input/Turbine Speed Sensor A Circuit Malfunction.
P0731 = Gear 1 ratio incorrect.
P0734 = Gear 4 ratio incorrect.
Sounds to me someone installed a used transmission that didn't match the original.
bad vehicle speed sensor
Code P0715 means:Input/Turbine Speed Sensor Circuit Malfunction
Trouble code P0715 means: Input/turbine speed sensor circuit malfunction
The PO715 error code in a Mercedes ML 430 indicates a malfunction with the turbine speed sensor, which measures the rotational speed of the turbine in the transmission. This sensor is crucial for optimal transmission performance and shifting. Typically, it is located on or near the transmission, often found in the valve body or input shaft area. A malfunction can lead to poor shifting behavior, decreased fuel efficiency, or transmission-related issues.
P0715
po715 is the code for the neutral safety switch.
The speed sensor on a 1997 Escort is located on the transmission. It is right behind the bell housing. The Code PO715 means that this sensor needs to be fixed or replaced. This sensor can sometimes pop out of its plug, so do not purchase a new one until this is checked.
In researching other computer trouble codes, I ran across the site that is listed under "Related Links" down below the sponsor links.That site suggests the P0715 code relates to "Input/Turbine Speed Sensor Circuit Malfunction"
Code P0715 is triggered when the transmission's Input Speed Sensor isn't providing a reliable signal. Common Problems are a defective input/turbine speed sensor, defective shift solenoids, a defective engine coolant temperature sensor, a defective valve body, or dirty transmission fluid that restricts the hydraulic passages.
an input speed sensor on the transmission that will usually cause problems with 3rd or 4th gear, get yourself a manual for the location of the sensor and replace.
P0715 Trans Speed Shaft SensorP0715 Transmission Speed Shaft Sensor Circuit Malfunction Possible Causes TSS signal circuit open or shorted to ground TSS is damaged PCM has failed
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