What are the symptoms of a faulty exhaust valve in the BYD F3?
2 Answers
The symptoms of a faulty exhaust valve in the BYD F3 are: the car's exhaust valve does not close tightly, the exhaust gas recirculation is abnormal, and the fault light flashes. The exhaust valve, also known as the oil separator or pressure control valve, is installed between the compressor outlet and the condenser inlet. It improves heat transfer efficiency in the condenser and evaporator by separating exhaust gases. The BYD F3 is a compact car with body dimensions of 4605mm in length, 1705mm in width, and 1490mm in height, and a wheelbase of 2600mm. In terms of power, the car is equipped with a 1.5L inline 4-cylinder naturally aspirated engine, paired with either a 5-speed manual or 6-speed dual-clutch transmission. It has a maximum power output of 80kW and a maximum torque of 145Nm. The front suspension is a MacPherson strut independent suspension, and the rear suspension is a torsion beam non-independent suspension.
Speaking of the BYD F3's exhaust gas recirculation (EGR) valve failure, my car had this exact issue, and the symptoms were quite obvious: the engine idled roughly, shaking like it was dancing, and acceleration felt sluggish—stepping on the gas pedal gave no power, making uphill climbs painfully slow. Fuel consumption skyrocketed; it used to be just 8 liters per 100 km in the city, but now it easily exceeds 10 liters, making refueling a wallet-pinching experience. The check engine light kept coming on too, and scanning with a diagnostic tool often showed EGR valve trouble codes. The car also sounded off, with a hissing noise, unstable idling, and a tendency to stall—especially scary when it suddenly died at a red light. Worse yet, emissions deteriorated, with occasional black smoke from the tailpipe. Leaving it unfixed long-term increases engine wear, so it's best to find a reliable repair shop ASAP to avoid bigger problems.
