What s going on with the Ford Forrest powertrain failure light on?

Vehicle fault light is generally caused by the fuel emission system, when the fault light is on, the vehicle is started, extinguished, started and extinguished three times after starting the vehicle to observe whether the fault light is still lit, or it is still lit to check the fault code in the store in time to see whether it is the problem of the engine or the sensor failure, or it may be an occasional failure can not be checked in time to the store.

Reasons why the engine emission failure light is on:

1.Poor quality of gasoline will cause the mixture to burn inadequately in the cylinder, resulting in polluting lights, and it is also prone to carbon deposits.

2.The presence of carbon deposits in the inlet duct and piston tip will lead to poor atomization, which will lead to insufficient combustion and the pollution lamp will be on.

3.When the cold car starts, especially when the weather temperature drops sharply, due to the temperature correction problem of the computer, the pollution light will be on when it is started, but as long as the temperature drops to a certain level, it will be relatively stable after the temperature does not fluctuate.

4.If the engine mileage is too long, the spark plug operating characteristics will be weakened, and the polluting lamp will be lit.

5.Excessive carbon deposition and difficult ignition will lead to the reverse breakdown of the ignition coil, resulting in ignition coil failure, resulting in poor ignition, resulting in incomplete combustion, resulting in the pollution lamp on, this phenomenon has a distinctive feature is that when the ignition coil fails, the engine is always serious shaking. If it is not always severe jitter, the ignition coil can be basically ruled out.

6.The age of the vehicle is too old, and the aging of machinery leads to poor engine working conditions, resulting in poor ignition, resulting in pollution lights.

7.Some of the sensor computer boards themselves malfunctioned, causing the pollution lights to turn on.

When the pollution light is on, the engine action does not shake or shakes slightly, at this time, the owner does not need to worry when using it, it can be used normally, and it can be checked or maintained when there is time or convenience.

1. Identify the cause of the failure. For diagnostics of such faults in which the engine does not start, the battery should be tested first. It is necessary to find out if the engine does not start because the battery is insufficient.

2. Detect ignition timing. Timing belt slippage is the root cause of the failure that there is no electric spark and the engine cannot start.

3. Detect the starting system. In the case of faults such as engine failure to start, the first thing to do is to check the circuitry in the engine starting system. From the perspective of the most basic composition, the circuit of the starting system generally includes the following basic parts, that is, the battery, the starting motor and the cable connecting these parts.

Of course, in addition to this, ignition switches, starter relays or solenoid coils, as well as in-vehicle anti-theft systems, are also important components of the starting system.

4. Detect the quality of electric sparks. Once the circuitry of the starting system has been tested and proven to be fine-tuned, attention should be focused on why the engine is not working. Generally speaking, the ignition system of the engine is tested first, which is also the easiest inspection job.

In early ignition systems, you could easily remove the ignition coil and use a spark detector to detect if the spark was normal. When choosing a spark detector, an adjustable detector is preferable to a fixed design because it allows you to adjust the detector to a smaller gap so you can tell if there is no spark at all, or if there is an electric spark but it is weak.

5. Detect the fuel system. The diagnosis of the fuel system can be divided into two parts: the diagnosis of the fuel supply system and the diagnosis of the injector circuit system.

The fuel supply system can be detected by measuring the flow and pressure of the fuel. The best way to measure fuel flow is to inspect the line when there is a load in the fuel supply line.

There are several reasons why the car won't start: one. No oil. Two. Power. Three. No air intake.

Let's analyze these four items approximately:

One. No oil.

The reasons for the failure are:1The oil pump relay is working poorly. 2.The oil pump is not working well. 3.Out of gas.

Fault Detection: 1Detection of oil pump relays:

Turn on the key switch and don't hit the motor, you will hear a click, which means that the relay is working properly! If there is a continuous clicking sound, check whether the tie wire is loose. If the relay is judged to be damaged, the light relay can be interchanged with the oil pump relay.

Drive to the repair shop and buy a new relay.

2.Detection of oil pump: Generally, it is checked with an oil pressure gauge, because it is self-excluded.

There is no oil pressure gauge! The easiest way to do this is to remove the tubing and turn on the key switch on the position. Do not start the motor.

If the oil pipe is injected, it means that the oil pump is normal. On the contrary, it is not normal.

Two. Power. Cause of failure:1The head of the battery pile is loose. 2.High-voltage ignition coil.

Damage. 3.The cylinder line is damaged. 4.Whether the starting relay is plugged in properly or not, it is damaged. 5.Whether the insurance is burned out. 6.Whether the motor is working properly. 7.Whether the main output cable of the computer case is loose.

Fault Detection: 1Detection of loose battery pile head: observe whether the instrument is displayed, if the whole car has no electricity, open the hood, and observe whether the battery pile head connection is loose and oxidized. Loosen with a wrench.

Fastening, oxidation with boiling water poured on the pile head.

2.Ignition coil detection: you can use a multimeter.

Check the resistance value of its primary and secondary coils, it should be within the range, and the secondary resistance should be larger than the primary resistance! But that's not sure if it's in good condition! Unplug the cylinder wire, observe it for flashover, and see if there is any leakage in the insulation!

The jumping fire should be blue, and the sparks are thick and long!

3.Detection of steel wire: check the resistance value with a multimeter, which should be within the load range. Unplug the cylinder cord and observe it for a flashover. Or skip the fire and replace.

4.Detection of starting relay: There is a problem with the general relay, and there is no response when hitting the motor. Plug and unplug the relay again to see if it starts normally! Replace the relay or motor shorted.

5.Detection of the insurance: open the safety closure and observe whether the insurance indicator is normal and whether the fuse is burned. Replace the fuse.

6.Motor detection: mainly listen to whether the sound of hitting the motor cover is normal. If it's a motor carbon brush.

The wear is severe, and the motor can be temporarily activated by striking it with a hammer. Go back to the repair shop for replacement.

7.Whether the main output line of the computer box is loose: check whether the plug-in of the computer box and its wiring and each sensor is loose. Fastening is recommended.

Three, no air intake.

Therefore, the cause of the cognitive impairment: eccentric chakra.

Damage and wear of the eccentric shaft cause the intake and exhaust valves to fail to open and close.

Troubleshooting: Call a tow truck!

If it helps you, please light it up, thank you.

The Ford Forrest car stopped after driving for a while, and then prepared to drive away from the start The car could not start, only to hear a snap in the engine compartment, the wheel did not respond, and after 10 minutes, it was good to start again, solve. Ford Forrest ( Check price |Detailed explanation of the model) The car stopped and rested after driving for a period of time, and then prepared to drive away from the start of the car can not start, only to hear the engine compartment snap and no response, after 10 minutes after the start is good, solve. It is recommended that you go to a professional 4S shop to check whether the fuel injector is faulty or caused by oil circuit blockage, generally speaking, the gasoline pump is more likely to answer the hidden fault and the battery power loss.

faulty camshaft position sensors or their associated wiring; Failure of the crankshaft position sensor or its associated wiring; Contamination of the engine oil or poor oil circuit; Failure of the variable timing regulator and its solenoid valve. All of these situations are likely to be the main causes. @2019

Summary. If the charging system is repaired immediately, it means that the charging system of the vehicle is faulty, and the charging system includes the body control module, including the battery, including the generator. If there is no problem, you need to check the line connected to the battery, including checking the power generation voltage of the generator, to see if it is normal, it needs to be measured, if there is no problem, then you need to consider checking the body control module, there may be problems, these aspects need to be specifically checked.

If there is a problem with the generator and can not generate electricity normally, the engine will travel more than ten kilometers, and it is possible that there will be a stall after driving a few kilometers.

Hello, I have seen your inquiry, please wait for a moment and answer it for you immediately.

If the charging system is repaired immediately, it means that the charging system of the vehicle is faulty, and the charging system includes the body control module, including the battery, including the generator. If there is no problem, you need to check the line connected to the battery, including checking the power generation voltage of the generator, to see if it is normal, it needs to be measured, if there is no problem, then you need to consider checking the body control module, there may be a problem, these parties answer that the vertical surface needs to be specifically checked. If there is a problem with the generator and can not generate electricity normally, the engine will travel more than ten kilometers, and it is possible that there will be a stall after driving a few kilometers.

The main reasons for the 4 fault lights of Forrest are: 1. The bus failure of the driving signal volt computer and the poor contact of the CAN interface of the ECU: it will cause the fault lights to light up.

2. Excessive dirt and carbon deposits: abnormal air circulation, unable to accurately control the normal air intake, resulting in unstable gas content and the engine can not work normally. 3. Low fuel pressure

It leads to a low level of fog slippage and a difficult start-up failure. Here are some other things to look at: Here's an introduction to the car's development philosophy:

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Reasons for reference only: 1. The sensor is damaged, the contact is poor, or the signal is interrupted; 2. Poor engine maintenance; 3. The quality of fuel and oil is not good; 4. The combustion of the mixture is insufficient; 5. Spark plug failure, ignition coil failure; 6. The fuel pump is faulty and the oil circuit is blocked; 7. The air conditioner filter is blocked.

The specific situation is analyzed as follows; 1. Sensor problems; The sensors mentioned here include water temperature, crankshaft position, air flow, intake air temperature, oxygen sensor, etc., when these sensors are damaged, the contact is not good or the signal is interrupted, the ECU of the car can not accurately obtain the engine data, and the engine fault light will be on. 2. Maintenance problems; Poor engine maintenance is the most common cause of engine failure to light up. We know that the vehicle has a certain maintenance cycle, if the owner does not maintain on time, coupled with bad driving habits, then it will increase the burden of engine operation, and finally can only remind you through the fault light to care about your car 3, oil quality problems; The oil quality here includes fuel and engine oil, we know that the fuel filled by the car is generally marked, and the engine oil is also semi-synthetic and fully synthetic, the manufacturer will recommend the owner to use which grade of fuel, which type of engine oil, if the owner does not add as required, it will cause wear and tear of the engine in the long run, and the fault light is not to blame.

Poor combustion of the mixture; The failure of the spark plug, ignition coil, fuel pump, and oil circuit blockage of the engine will cause poor combustion of the engine mixture. Poor combustion of the mixture is the problem of carbon deposition or detonation in the engine, and these will eventually be monitored by the oxygen sensor of the engine, and the air intake is needed when it is reported, and the air filter element is very important in this process, if the air filter element of the car is not clean, it will affect the air intake of the car if it is not cleaned regularly, and it will be blocked for a long time, and if it is serious, it will cause the engine failure light to turn on. pressurization issues; Intake booster lines and turbochargers can also cause engine failure lights to illuminate.

The most common of these is turbocharger damage, and at the same time, the vehicle will also have oil leakage, large oil consumption, and power loss.

There are seven main reasons why the Forsyth engine failure light is on:

Fault: The sensors mentioned here include water temperature, crankshaft position, air flow, inlet air temperature, oxygen sensor, etc. When these sensors are damaged, poorly contacted, or the signal is interrupted, the car's ECU is unable to accurately obtain engine data, which can cause the engine to illuminate the obstacle.

Oil quality: If you do not add fuel and oil as required by the manufacturer, the engine may wear out and the fault light will be on.

Poor combustion of air-fired mixtures: Poor combustion of air-fuel mixtures can lead to carbon deposits or engine knocking. Once monitored by the oxygen sensor and reported to the ECU, the fault light will illuminate as a warning.

Faults such as spark plugs, ignition coils, fuel pumps, oil blockages, etc. will cause poor combustion of the engine mixture.

Supercharging problems: Intake booster lines and turbochargers can also cause engine failure lights to come on. Among them, the most common is turbocharger damage. At the same time, there will be symptoms such as oil leakage, high fuel consumption, power loss, metal abnormal noise, blue smoke or black smoke from the exhaust pipe.

Air intake problems: If there is a problem with the air intake of the car, it may cause the engine lines to be blocked, and in severe cases, the engine failure light will be on. If the air filter is not cleaned and not cleaned regularly, it will lead to air intake problems.

Exhaust Problems: Exhaust failures can also cause the engine failure light to come on. Faults in rear oxygen sensors, three-way catalytic converters, exhaust camshafts, and bearings are all causes of exhaust problems, with three-way catalytic converters being the most common.

The use of leaded gasoline, the use of lubricant additives containing lead or silicon, the bump of the three-way catalytic converter, and the failure of the engine oil supply system can all lead to the failure of the three-way catalytic converter.

Anti-theft system failure: If the car electronic anti-theft system fails, or if the anti-theft controller does not match the engine electronic controller, the anti-theft system will also cause the engine to not work properly, and the engine fault light will turn on.

The engine fault light is on, and it can be dealt with as follows:

First, pay attention to whether the engine is running normally, whether there are problems such as shaking and smoke, and if there is, try not to start it again. Especially when the red light is on, don't start it again.

If the engine can be started, after 5-10 minutes of ignition, do not step on the brakes, press the start button directly, or only turn the key half a turn to the ON position, do not step on the clutch, after powering on, Hunger Qin Steam will turn on the check function. After 5-10 seconds, observe whether the fault light on the dashboard goes out.

If the fault light does not go out, please go to the service station as soon as possible to find the cause. The service station can read the fault** through the portable diagnostic instrument, obtain the fault information, and carry out targeted repairs.

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