P0718 - OBD Trouble Code

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When do you find the error code P0718 in your vehicle? If you find the diagnostic trouble code P0718 in your vehicle, then it means that the powertrain control module has identified an irregular voltage input signal from the turbine or the input speed sensor which has been given the title A. Though the turbine and input speed sensors are virtually the same, which carries out the same purpose, the module terminology differs between the manufacturers.

You have to permanently attach as notched reluctor wheel or grooves that are specifically designed to the transmission main or the input shaft. During the running of the engine, as it transfers the RPM’s to the transmission, the input shaft or the reluctor wheel will pass very close to the end of the sensor. The steel shaft or the reluctor wheel will sufficiently complete one electronic or electromagnetic circuit within the sensor. You will see an electronic pattern formed as the circuit is interrupted by the grooved or jagged areas passing by the sensor. The pattern is recognized as a waveform by the power control module to understand it as transmission input/ turbine sensor.

What causes this problem with the Input/Turbine Speed Sensor A Circuit Intermittent

• The input speed sensor is faulty or damaged.
• The wires and connectors are defective, lose or burnt.
• A faulty powertrain control module or a programming error in the PCM.
• Buildup of metal remains in the magnetic sensor.

1. Speed Sensor - Is your speed sensor damaged or defective? Looking for right replacement part. Get them at Parts Avatar at affordable prices online.
2. Engine Speed Controller - the speed controller controls the speed of your engine and in any case if you find it defective, replace them immediately with the right component.
3. Automatic Transmission Fluid - You can find the right replacement part for your vehicle, from Parts Avatar at the best prices online.
4. Engine Coolant Temperature Sensor - This component needs immediate replacement if there are any leaks.
5. Multimeter - A damaged multimeter can cause trouble to your system. Replace them as desired.
6. PCM - A damaged or faulty component is the common defective part in most vehicle which leads to the OBD error code. Replace them immediately or get the issues fixed.

Willing to know some common symptoms of OBD Code P0718? Your wish is our demand. Have a look at them below:

Common Symptoms

• The operation of the speedometer also known as odometer is irregular.
• Improper transmission of the shifts.
• The speedometer or the odometer does not operate properly.
• The shift points of the transmission are irregular or harsh.
• Reduced or decreased fuel efficiency.

We have listed out some ways which would help you to correct the occurrence of OBD Code P0718. They are mentioned here as follows:

• Replacement of the input speed sensors.
• Repairing or fixing the broken or damaged wires and circuits.
• Repairing the faulty power control module or the programming error.

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If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• Usually the technician will visually inspect the system wires and connectors. If there are any shorted or open circuits or connectors, repair them before proceeding for further diagnosis. Also, never forget to check the battery, cables, and cable ends and test the alternator output at this point.
• Next you have to connect the scan tool to the diagnostic port of the vehicle and recover all the stored codes. You can also note them down for further reference including the freeze frame data.
• With the help of scanner data stream identify which of the circuit is not functioning properly and if it has input and output sensor codes in them.
• In order to get the most precise information available with the help of scan toll, narrow down the data stream so as to include only relevant information.
• Check for metal debris on the input and output speed sensors by removing them, as it can cause an irregular sensor output data. If there are excessive debris, clean them before reinstallation.
• You can also visually check for the interruption of the grooves or reluctor wheel notches if there are any signs of damage or faults.
• With the help of a DVOM test the individual sensor resistance and circuit voltage by following the guidelines of the manufacturer.
• Replace those sensors which do not obey the manufacturer’s specifications.
• A faulty controller may be the result, if the related controllers are not properly disconnected prior to testing resistance or continuation with the DVOM.

Common mistakes when diagnosing the P0718 error

• Faulty PCM.
• Faulty Input speed sensor.
• Accumulation of metal debris in the sensor.