What are the symptoms of engine control system failure?

The engine is a sign that looks like a faucet and an engine. The fault light of the engine is generally due to the fault of the electronic control system, sensor and circuit of the engine, and then the fault light is on.

As shown in the figure, it is always on, indicating that the engine control system is faulty. ? Engine control system failure, this sign is on.

Common faults of engine electronic control system;

Poor connection of wires and connectors There are many wires and connectors in EFI system. With the increase of mileage, there may be normal transmission of signals such as disconnected solenoid valves, loose, oxidized and dirty connectors, which will cause poor contact, affect sensors and electricity, and eventually lead to abnormal or non-working engines.

In this regard, when disassembling the components of the electronic control system, attention should be paid to whether the wiring and connectors are reliable. When troubleshooting, when a fault code indicating poor sensor signal appears, the connection of the sensor and the contact of the connector should be checked first. Some fault codes indicate sensor failure, which is actually caused by poor line contact.