How to solve the P0720 fault and how to solve the P0717 fault code

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Car failure is a phenomenon in which the car cannot complete its functions, such as difficulty in starting the engine, not starting the car, oil and water leakage in the car, and failure of the lighting system.

The common faults are: sudden change in working conditions, abnormal sound, abnormal smell, abnormal smoke exhaust, abnormal temperature, abnormal appearance, abnormal consumption of fuel and lubricating oil, and leakage. Common faults are those that occur frequently and are frequently encountered in use.

Common faults of electronically controlled gasoline injection engines.

The phenomenon of not starting may be that the ignition switch is turned on and the engine does not have any signs of starting, the starter is loud but cannot rotate, the starter can turn but cannot move the engine, or the engine can be driven by the starter but cannot start. Difficulty in starting may be the slow rotation of the engine, or the uneven sound when the engine rotates.

Starting difficulties may occur in freezing weather or very hot weather, or at room temperature, or it may be difficult to start a cold car for the first time, and it may start normally when the car is hot.

These phenomena are related to the poor operation of the main injector, cold start injector, temperature control switch, ECU and control circuit, battery power loss, ignition or pulse generator damage, fuel system does not supply oil or abnormal oil supply and other factors. For automatic transmission cars, failure to start may be due to the wrong position of the transmission handle.

Fault Diagnosis** (P0720) Vehicle speed sensor circuit (for automatic transmission vehicles only) Even when the engine speed is less than 4000r min and the fuel is cut off, the vehicle speed sensor does not output for more than 4 seconds).

1) When turning off the ignition switch, remove the connector of the vehicle speed sensor.

2) Check that the terminals of the "V" and "LG" wires are properly mated.

3) If the plug-in terminal connection is normal, detect the resistance of the vehicle speed sensor.

Resistance between terminals: 100-300

The resistance between the terminal and the transmission housing is 1m, and the resistance is measured to meet the specified value!

Summary. Hello, P0717 is a problem caused by the damage of the gearbox turbine input speed sensor, when the gearbox computer can not receive the turbine speed signal, it will keep the fault code, the common reason is that the line appears virtual and the sensor itself is damaged. You can first try whether the gear car can drive, so that you can determine if there is a problem with the coupler itself.

There is an impact when overshifting, but it can be driven, indicating that the coupling is basically normal, and the cause of the failure is the damage to the turbine sensor itself, the plug and the virtual connection of the line, and the transmission computer. There is a time limit for the first reply, if you have any questions, you can reply and answer them in detail.

Hello, don't click to end, I'm textual to give you the full answer, 2-3 minutes.

Hello, P0717 is a problem caused by the damage of the gearbox turbine input speed sensor, when the gearbox computer can not receive the turbine speed signal, it will keep the fault code, the common reason is that the line appears virtual and the sensor itself is damaged. You can first try whether the gear car can drive, so that you can judge whether the coupler itself has a question. There is an impact when overshifting, but it can be driven, indicating that the coupling is basically normal, and the cause of the failure is the damage to the turbine sensor itself, the plug and the circuit are falsely connected, and the three places of the gearbox computer in the silver town.

There is a time limit for the first reply, if you have any questions, you can reply to the mega disturbance and answer it for you in detail.

When the P0700 fault code occurs, the car should be sent to the auto repair shop for repair in time to avoid accidents. Because the P0700 fault code is a problem of the gearbox, there are many reasons, such as the gear tooth surface is seriously worn, so that the meshing gap is too large; Gear tooth fatigue peeling or chipping, or intermediate shaft, second shaft excessive wear, or spline shaft and gear spline wear is serious, the gap is too large, etc.

The Chinese definition of p0700 is transmission control system fault (fault indicator request). The transmission control module helps the transmission decide when and how to shift gears by collecting information, and the fault indicator, also known as the check engine light, lights up a yellow or red engine symbol on the instrument panel when the control module detects a fault. This fault code indicates that the powertrain system has received a request from the transmission control system to light up the fault light.

The P0700 fault code is a problem with the gearbox, and the reasons for this failure are as follows:

Insufficient quantity of gear oil or poor quality of gear oil; The tooth surface of the gear is seriously worn, so that the meshing clearance is too large; Fatigue spalling of gear teeth or chipping and chipping; Excessive wear of the intermediate shaft and the second shaft, or serious wear of the spline shaft and the spline in the gear, and the clearance is too large; bending of the shaft or loosening of the locking parts on the shaft; loose bearings or damaged cages; Factors such as non-working parts of the fork contact, friction and so on.

Therefore, when the P0700 fault code occurs, the car should be sent to the car repair shop for repair in time to avoid accidents.

P0700 indicates that the transmission requests that the fault light be lit.

A fault like yours** just tells you that your transmission is malfunctioning and at the same time lights up the fault light.

The specific transmission problem also needs to be analyzed by data flow, and the general occasional failure is recovered as long as the fault code is clear.

If it persists, accompanied by transmission jitter, then a data stream analysis is required, usually caused by the sensor.

The P0720 fault code, which is applicable to all automotive manufacturers, means Output Speed Sensor Circuit. to get the corresponding fault code explanation and solution.

Background: The output speed sensor (OSS) is tasked with transmitting the speed signal from the transmission output shaft to the electronic control unit (ECU). If the ECU detects that the OSS signal is zero during normal driving, the fault code will appear.

When the car is troubleshooting, it is often necessary to clear the fault code. When the fault is cleared, it must be carried out in accordance with the fault removal method specified in the specified model, and the negative pole must not be directly removed to remove the fault by taking the iron wire. Otherwise, it is likely to cause problems in the following two situations:

First, cause some models of the control center computer to lose normal records, we know, some models of control computer has an automatic memory function, after removing the battery negative pole tie wire, it will automatically clear the engine operation data stored in RAM (random memory), so that the car after the maintenance of a considerable long slag scale for a period of time performance is not good, and may not be long after driving, and there is a processed fault code; The second point may cause the loss of normal functions, such as the audio lock function is one of the very common cases, in this case, to the sound system to work normally, it is necessary to repair the sound again, this situation, it is very troublesome.

The fault code P0703 indicates the circuit fault of the brake switch B, and the function of the brake switch is to transmit the information of whether the brake pedal is pressed to the electronic control unit (ECU) in the form of an electrical signal, which is an important basis for stopping the cruise control and separating the torque converter.

The electronic adjustment unit does not receive a change in the input signal from the brake pedal position. Causes of failure include BPA BPP switch failure, incorrect calibration, faulty circuitry and connectors, or faulty electronic modules connected to BPA or BPP. The function of the brake switch is to transmit the information of whether the brake pedal is pressed to the electronic adjustment unit in the form of an electrical signal, which is an important basis for stopping the cruise control and separating the torque converter.

Every time you troubleshoot your car, you need to clear it**. When clearing the fault code, Biwu should strictly follow the fault code removal method specified by the specific model, and shall not remove the negative terminal wiring of the battery to clear the fault code. Otherwise, it may affect the adjustment of some models, and the loss of the history of the computer.

Many friends basically know that most models of ** computers have memory functions. When the ground wire on the negative end of the battery is easily removed, useful engine operation data stored in the RAM is erased, which can affect your car to show undesirable symptoms long after repair, or to reproduce erased faults after a period of driving**. @2019

Recently, a friend asked me about the car, and then I wanted to know the maintenance method of P0 607? This question is covered by a small series of networks. Now, I would like to share my thoughts with my friends.

Well, let's stop talking nonsense. Let me tell you what I think. The symptoms of the P0607 fault code are signs such as weak engine acceleration and can be used to detect flywheel ring gears.

If there is any wear, remove the crankshaft sensor. However, it will be found that the iron filings are basically absorbed and accumulated by the crankshaft sensor. As soon as it needs to be washed, the car will be back to normal.

The English meaning of this defect code is that when translated into Chinese, that is, the category it covers is computer or auxiliary output circuit; The most critical function is to regulate the optimal amount of fuel injection and ignition timing throughout the engine, and then a function is an integral part of monitoring vehicle emissions regulations.

When driving a car normally, the motor gears caused by the starting motor of the car will scratch the flywheel teeth and stare the circle, and the stamped iron filings will be adsorbed by the crankshaft sensor. If a cumulative amount is required, the sensor will check if the speed signal is abnormal. At this time, the ECU detects an uncertain speed signal, and then turns on the self-protection measures, that is, it will restart itself, so over time, it will cause the fault code P0607.

From this, we can draw a conclusion: the speed signal is the most important main parameter to fully ensure the normal rotation of the car Youxiang engine.