What are the symptoms of a faulty intake bypass valve in the Haval H6?
3 Answers
The symptoms of a faulty intake bypass valve in the Haval H6 are turbocharger air leakage, which reduces its compression efficiency, resulting in engine weakness, difficulty in acceleration, or black smoke emission. The basic function of the bypass valve is to act on the turbine side when the engine intake pressure exceeds a certain value, allowing exhaust gas to bypass, thereby reducing the exhaust flow through the turbine and controlling excessive cylinder pressure. Taking the 2021 third-generation 2.0T automatic two-wheel drive Max model of the Haval H6 as an example, its length, width, and height are 4653mm, 1886mm, and 1730mm respectively, with a wheelbase of 2738mm. It is equipped with a 2.0T turbocharged engine, with a maximum power of 155kw and a maximum torque of 325nm, matched with a 7-speed dual-clutch transmission.
Speaking of the intake bypass valve failure in the Haval H6, as someone who's been driving and repairing cars for decades, I've seen plenty of such symptoms. First, the engine performance drops significantly – at idle, the car shakes like an earthquake, acceleration becomes sluggish, and even climbing a small hill feels like the turbo has gone on strike. Then, you might hear a hissing air leakage sound from the engine bay, which is really annoying, or experience difficulty starting the engine. The check engine light coming on is a common signal, but don't ignore it – otherwise, fuel consumption will skyrocket, and the engine might overheat and get damaged. It's even more dangerous on highways, as sudden deceleration could lead to accidents. I recommend taking it to a professional repair shop ASAP. Haval parts are easy to find, and replacement costs aren't high, so don't delay too long. Regular maintenance with extra attention to the turbo system can prevent such issues.
My Haval H6 had a bypass valve issue, and I could tell something was off while driving. The idle speed fluctuated erratically, and the engine ran like it was gasping for breath. When accelerating, there was no response when I pressed the throttle, making overtaking a real challenge. There was also a slight "puffing" sound, like air leakage, especially noticeable after a cold start. Later, the engine malfunction light came on, and fuel consumption increased—a full tank would only last about 400 km. A visit to the 4S shop confirmed it was a bypass valve failure. After replacement, the driving became smooth again. Sharing this experience to remind everyone not to wait until the issue gets severe before fixing it, to avoid being stranded on the road and affecting both mood and budget.
