The company was also still preparing for change of China's emissions standards from State V to State VI in the three months from January to March.
The company offers artificial intelligence-backed technologies to help self-driving vehicles better comprehend the surrounding environment and make decisions, to increase automation, lower the incidence of traffic accidents and ensure people's safety, it said.
The company will replace defective parts free of charge. The recall will start on June 20.
The company, which owns the largest number of gas stations nationwide, will take advantage of its station network and mainly focus on the construction of hydrogen refueling stations for vehicles.
The company's efforts around self-driving technology was marred in March 2018 when one of its automated test vehicles hit and killed a woman, the first death involving the technology. The backup Uber driver involved in the crash was charged with negligent homicide for being distracted in the moments before fatally striking the woman in suburban Phoenix.
The company's businesses include organic silicon products, chemical materials and the production and sale of butanone oxime, a substance used in coating products that is harmful if it comes into contact with skin.
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The company is based in Irvine with manufacturing operations in Moreno Valley, California. It is owned by Chinese automotive supply company Wanxiang Group.
The company said on Friday it has suspended the planned purchase of Le Vision Pictures, a filmmaking arm of LeEco, and will hold a briefing on Tuesday related to the termination of a reorganization of the company's major assets and operating situation.
The complaints include improper photographing of genitals, improper touching during pelvic exams, and making sexually suggestive comments.
The company, also known as PetroChina, said its natural gas production reached 138.02 billion cubic meters in 2018, of which 109.37 billion cubic meters were domestic output, a year-on-year increase of 5.9 percent and which accounted for 70.2 percent of the domestic natural gas production last year, according to the 2018 Environmental Protection Communique 2018.