What's the matter with the fault code indicating excessively high fuel concentration?
3 Answers
Fault codes are related to the gasoline being used. If the detonation value fails to meet the standard, it indicates a long-term issue with poor fuel quality causing the fault code. It may also result from vacuum leaks in the engine intake system, excessive carbon buildup, or contaminated fuel injectors. Additional information: 1. Types of fuel gauges: The fuel gauge on the dashboard typically comes in analog or digital forms, marked with 'F' and 'E' at each end. 'F' indicates a full tank, 'E' means the fuel is empty, and the middle position shows half a tank. When the fuel warning light comes on, it means the gauge is approaching 'E'. 2. Running out of fuel: Generally, when the fuel gauge pointer reaches the red line, there is about 10% fuel left in the tank, allowing an average driving range of 20-60 km, depending on the vehicle model. If you continue driving without refueling beyond the red line, it may cause the fuel pump to burn out.
I've been driving for over ten years and have encountered the engine light showing a fault code for excessively high fuel concentration several times. This means there's too much fuel being injected, possibly due to leaking fuel injectors or excessively high fuel pressure, causing an imbalance in the air-fuel ratio. If the oxygen sensor is faulty, it can also misjudge the concentration, leading the computer to over-control fuel injection. Last year, my car had this issue—fuel consumption suddenly increased to 13L/100km, and black smoke was emitted. It turned out the oxygen sensor had aged. I rushed to the repair shop to replace it; otherwise, severe carbon buildup could occur, risking engine cylinder scoring. During regular maintenance, always check the sensors and intake pipes for leaks to prevent such faults. If the light comes on, don't ignore it—promptly use an OBD scanner to read the code and leave the repairs to professionals. Safety first.
As a DIY car owner, I've fixed many minor issues. A fault code indicating excessively rich fuel mixture usually points to an incorrect air-fuel ratio. I've personally encountered this, with possible causes being a vacuum system leak (such as a cracked intake pipe) or a dirty oxygen sensor providing incorrect feedback. I connect a scanner to the ECU to check the data stream and confirm low oxygen levels before replacing parts. Sometimes cleaning the fuel injectors or throttle body resolves the issue. The cost is low - a new sensor only costs around 200 yuan. But if the fuel injector is completely broken, you'll need to spend about a thousand yuan to replace it. I recommend first checking basic issues yourself before rushing to a shop - it saves money and builds skills. After repairs, remember to test drive and check fuel consumption; returning to normal levels means you're good to go.
