Fault Caused by Electronic Control Engine Computer ECU

The electronic control engine computer ECU cannot monitor the failure caused by the following reasons.
(1) Generally speaking, the ECU of low-end cars cannot monitor the failure of the high-voltage ignition circuit caused by the ignition coil not working, the spark plug is contaminated or damaged, and the high-voltage wire core is broken.
(2) The ECU cannot monitor the blockage of the electric gasoline pump inlet filter and fuel filter pipeline, and the fuel inlet failure caused by the flattening of the fuel inlet pipeline or return pipeline.
Smooth, or the mixture is too thin. Mercedes-Benz car rearview mirror loose
(3) The ECU cannot monitor the air filter inlet or the air filter is blocked or throttled. Resolve malfunctions or vibrations caused by changes in air flow. Product brand overview Mercedes-Benz maintenance and repair common accessories
(4) ECU cannot monitor the level of cylinder pressure, or the uniformity of each cylinder pressure
(5) ECU cannot monitor whether the plug and pin are damaged, but it will generate fault codes

(6) The ECU cannot monitor the poor grounding, but this will generate a fault code
(7) The ECU cannot monitor the leakage or throttling of the vacuum line of the vacuum booster in the engine control system. However, the vacuum of the intake manifold absolute pressure sensor will be monitored, and the ECU will also record a fault code.
The above items are the causes of failures that cannot be detected by the electronic control engine, and should be paid attention to when repairing the electronic control engine. Whether it is an electronic control failure or a mechanical failure, the location and performance characteristics must be correctly distinguished in order to accurately and quickly determine and eliminate the failure
During the inspection process, if the engine is faulty and the engine fault warning light does not light up (the fault code is not displayed), it means that the engine fault may occur on the mechanical parts.