What is the P0726 fault code What is the Engine Speed Impedance Circuit Range/Performance Failure description? How do I fix the P0726 fault code What are the causes and symptoms of P0726 malfunction code?
What is the P0726 Fault code? What does it all mean?
A code P0726 is an indication that the powertrain management module (PCM), has been receiving an incorrect, unreasonable, and erratic signal from the engine shaft speed sensor circuit. The engine input shaft sensor is also known as the speed sensor or transmission shaft speed sensor. This code can be set to indicate an electrical or mechanical fault.
To allow the PCM to decide the right time to shift gears it must read the RPMs from engine. This function is performed by the motor input shaft speeds sensor. The PCM can’t determine the engine speed if it is not receiving a signal from the sensor. It cannot also manage the shifting strategy. This means that the transmission can’t shift gears correctly.
The P0726 fault code can affect vehicles of all makes and models, including but not limited to: Volkswagen, Chevrolet, Nissan Mazda, Duramax Audi, Jeep, Skoda, Duramax Audi, Jeep, and Skoda.
What is the P0726 Fault Code?
Fault code P0726 can be triggered by the following common causes:
- – Defective motor input shaft speed sensor
- – There are metal deposits at the tip end of the input shaft speed sensor
- – Defective gearbox output shaft speed sensor
- – Defective in shaft speed sensor reluctor wheels
- – Defective crankshaft position sensor
- – Damaged wires to sensor, loose connectors and open or short circuit problems
- – Defective shift solenoid
- – Transmission fluid that is not working properly or is missing
- – A PCM is not working properly or has to be reprogrammed
What are the symptoms of P0726 Malfunction Code?
You may experience the following symptoms if your vehicle has the code P0726:
- – Illumination for the check engine light
- – Hard, delayed, and erratic shifting
- Transmission cannot change gears
- Gearbox slip/slip
- – Increased fuel use
- – Non-working or wave speedometer
- – Engine misfires
- – Engine hesitation during acceleration
- – Engine stalling when the engine is idle or stopped
- – PCM may enter failsafe mode (limp Mode) to limit engine power
How to Fix the P0726 Fault Code
First, you must scan the fault codes in the PCM. Usually, P0726 is found along with other codes. To determine if the vehicle returns to normal, the mechanic should check the codes and clear them. Next, inspect the cables and connectors to the motor input shaft speed sensor circuit and cable. Any corrosion should be cleaned and replaced with newer cables. The vehicle should then be tested again to make sure that loose connectors are repaired. If the code is returned, your mechanic should test the reference voltage of an input shaft speed sensor. Both circuits should be tested for continuity and resistance. These tests should be performed on both circuits.
Near the front of the shaft is the engine input shaft speed sensor. It can be found inside the transmission box. The rubber O-ring seals the sensor housing to the transmission case. To collect any fluids that may have escaped from the sensor housing, you should place it under the transmission. Hot transmission fluid can cause serious health problems if the sensor is removed from its housing.
The following repairs may be able to resolve the P0726 fault code:
- – Replacing defective motor input shaft speed sensor
- – Replacing the defective transmission output shaft speed sensor
- – Replacing the defective crankshaft position sensor
- Repair damaged wires, connectors and open or short circuits to sensors
- – Replacing defective motor input shaft speed sensor reluctor wheels
- – Replacing a defective shift solenoid
- – Filling in the gaps with transmission fluid
- – Replacing dirty or contaminated transmission fluid
- – Reprogramming or replacing the PCM
How Serious Is the P0726 Fault Coding?
A code P0726 should be set on your vehicle. This code should be taken seriously and dealt with immediately. The sudden engine stop during acceleration can lead to an accident in heavy traffic. This code can lead directly to increased fuel consumption, engine stumbling during acceleration, and other driving problems. If the gear isn’t shifted correctly, or is stuck, it is possible that the transmission could be damaged.
