How to Check for Faults in the CRV Engine Emission Control System?
2 Answers
When engine faults occur, they generate a series of codes. After the ECU reads these fault codes, they will appear as indicator lights on the dashboard. Below are the reasons and solutions for the engine exhaust system fault light turning on: 1. Check for engine shutdown: Start and shut down the vehicle three times in a row, or disconnect the negative terminal of the engine battery, wait for 30 seconds, and then reconnect it. After performing the above steps, check if the engine fault light on the dashboard is still on. This method only applies to false engine faults. 2. Fault: If the fault light comes on and the vehicle cannot start after shutting down, this is usually due to a fuel pump or ignition system fault. In such cases, call for a tow truck directly.
As a CR-V owner for several years, whenever the engine warning light appears on the dashboard, I immediately check the emission system. The simplest method is to purchase a basic OBD scanner, like those affordable Bluetooth models priced around a few dozen yuan, and plug it into the port below the steering wheel to read the fault codes. Common issues include oxygen sensor failures or catalytic converter trouble codes like P0420/P0430, which can affect emission efficiency. After checking myself, I usually note down the codes and look up their meanings online, but I don't rush to repair immediately as there might be false alarms. I regularly change the air filter and engine oil to prevent system blockages, since prolonged emission issues can damage the engine and increase fuel consumption. If the light comes on and I don't have tools handy, I drive directly to the 4S shop for a more reliable diagnosis.
