What is the issue with the Haval H6 transmission failure?

[VanAsher]

Haval H6 transmission failure is caused by improper operation or lack of timely maintenance. If the transmission malfunctions, it is necessary to promptly visit a 4S shop for repairs. The Haval H6 is a compact SUV under the Haval brand. The Haval H6 is equipped with two engines: a 1.5-liter turbocharged engine and a 2.0-liter turbocharged engine. As the flagship model of the Haval brand, the Haval H6 is positioned as an urban intelligent SUV and was launched at the Great Wall Motors Tianjin new factory. It offers Mitsubishi 2.0L gasoline-powered models and Green Power 2.0T diesel models, available in three versions: Urban, Elite, and Premium.

[EmersynAnn]

A friend's Haval H6 had a similar issue last year, where the car jerked violently during low-speed gear shifts. Common problems fall into several categories: First, a faulty control module where the transmission computer fails to receive correct signals, causing erratic gear shifts. Second, sensor malfunctions, such as a wheel speed sensor covered in mud, which confuses the car about which gear to engage. For dual-clutch transmissions, it could be excessive wear on the clutch plates, especially in city traffic where frequent semi-engagement wears them out faster. Hydraulic system issues, like stuck shift solenoids or valve body leaks, can also make shifting rough. Lastly, don’t forget to check the transmission fluid—low levels or degraded oil (unchanged for 3-4 years) will hinder lubrication and cooling, directly impacting performance. It’s best to start by scanning for trouble codes to pinpoint the issue.

[KathrynFitz]

My H6 had its transmission repaired last month, and now it keeps jerking when shifting gears after a cold start. Such issues are often caused by aging seals in the hydraulic control unit leaking oil, resulting in insufficient oil pressure and delayed gear shifts. Loose or poorly connected sensor plugs can also cause the ECU to misjudge the vehicle speed, especially with wheel speed sensors and input shaft speed sensors having higher failure rates. For the 1.5T version with a dual-clutch transmission, wear on the clutch actuator can create a shuddering sensation similar to a manual transmission in semi-engaged state. Frequent short-distance driving leads to excessively low transmission oil temperature, accelerating wear—I installed an additional oil cooler later, which helped a lot. Remember, regular replacement of genuine transmission oil is crucial.

[DeclanAnn]

Transmission issues depend on specific symptoms. Sudden jerking during hard acceleration is mostly caused by clutch slippage, whereas hydraulic valve body blockage typically causes more noticeable shaking during steady-speed driving. A P0700 code from the onboard computer indicates a module failure, while P0846 usually points to an oil pressure sensor problem. Our club members have tested that oxidized solenoid valve pins can be treated with precision electrical cleaner, but if the valve body is internally worn, the entire assembly needs replacement. The 7-speed wet dual-clutch in the H6 is particularly prone to rust after wading through water—if water exceeds the wheel hub height, always check the transmission breather hole.