A full diagnosis must be made in order to rule out all possible causes, including contaminated transmission fluid, wiring harness damage and more. The most common mistake here is replacing the speed sensor when it is not actually the problem.
Common mistakes when diagnosing the P0716 code If there is no open, the mechanic will have to test all the wiring and circuits, as well as all related sensors and solenoids to determine the underlying cause. If either is open, the mechanic will check for continuity, and repair or replace any damaged wiring or circuits.
If the code resets, the mechanic will check the reference voltage and ground signals at the input speed sensor. The mechanic should also check the level and condition of the transmission fluid to rule out low fluid level and fluid contamination as the culprit. These codes will then be cleared, and the vehicle test driven to verify that the codes reset, and that the mechanic is able to duplicate the symptoms stated by the driver. How does a mechanic diagnose the P0716 code?įirst, the mechanic will connect an OBD II scanner to the car and verify the code or codes. Symptoms of the P0716 code can vary greatly depending on the underlying cause, and in some cases, there may be no symptoms. Dirty/contaminated transmission fluid that does not flow properly.Corroded connections at the input or output speed sensor.Several possible causes exist for the P0716 code. If the input speed changes radically, or exceeds the output speed, then the PCM will set the P0716 code.
If the input signal from the input speed sensor is erratic or incorrect, then the computer will lack information crucial for shifting correctly for current conditions. In order for an automatic transmission to shift properly, the car’s computer must know the vehicle’s engine speed. Without accurate input information, the computer will be unable to create the right shifting strategy for the transmission. The P0716 code indicates that the car’s computer has received an input signal from the engine speed sensor that is incorrect in some way.
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