What are the symptoms of a faulty ECU in a Haval H3?

1 Answers
Stacey
07/29/25 2:02pm
If there is an issue with the vehicle's ECU, the malfunction indicator light will illuminate. Persistent Malfunction Light: The engine malfunction light stays on continuously. If other engine hardware checks out fine but the light remains on, it may indicate a faulty ECU. Difficulty Starting the Vehicle: During startup, the ECU is responsible for increasing the fuel injection volume. If the ECU is damaged, the concentration of the combustible air-fuel mixture may be too low, making it difficult to start the vehicle. Internal Program Disruption: Fuel injection volume, ignition timing, transmission shift logic, and other functions may be affected. If the vehicle experiences poor performance or fails to start, it's advisable to check the ECU for potential damage.
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